Method for decomposition and removal of organic compound in air using platinum as main catalysis, method for formation of photocatalytic article and photocatalytic layer, and photocatalyst
22 claims: 10 independent, 12 dependent
- 1白金を主触媒とし、光触媒物質である二酸化チタンを補助触媒とする技術的思想に基づいて、バインダーと白金と粒径6nm以上10nm未満の二酸化チタンを混合して基体に塗布し、二酸化チタンの含有量に対して5~50%とする白金は光のないときでも常温で有機化合物を吸着し、吸着の際に白金は空気中の有機化合物を吸着し、分解し、このまま放置すると数時間で分解された物質で白金が覆われてしまい触媒毒となり吸着、分解をしなくなるので、太陽光などのあたる昼間、光触媒により白金の表面に覆われた物質を酸化させて触媒毒を取り払い、触媒毒がなくなった白金は吸着分解能を回復し、昼間は光触媒反応を行う二酸化チタンと併用させて効果を発揮し夜間は白金で吸着分解をする よう明暗を繰り返す ことで昼夜を問わず空気清浄機能を長期間継続的に発揮させることを特徴とする白金を主触媒として空気中の有機化合物を分解し除去させる方法。
- 2白金は光がない夜間に空気中の有機化合物を分解、吸着し昼間は二酸化チタンが太陽光の390nm以下の波長の光を利用して光触媒反応を起こして白金の周りについた触媒毒を酸化させて除去することで24時間有機化合物を分解除去できることで昼夜を問わず空気清浄機能を長期間継続的に発揮させることを特徴とする請求項1に記載の白金を主触媒として空気中の有機化合物を分解し除去させる方法。
- 3白金が主体とした光触媒なので、以後白金担持光触媒と呼ぶところの、白金担持超光触媒はその機能を発揮させるためには、白金および二酸化チタンが空気と接触していなければならないし、加えて白金の粒子と二酸化チタンの粒子が程よく攪拌されて混ざって担持されなくてはならないので、塗布する際によく伸ばせるようバインダーとして珪藻土を微粉末20nmから100nmにしてバインダー補助材である植物油を加え、必要に応じて寒冷地にも使用できるように不凍液としてエチレングリコールを加え、さらに拡散材としてタウリン、カテキンを加えることで昼夜を問わず空気清浄機能を長期間継続的に発揮させることを特徴とする請求項1に記載の白金を主触媒として空気中の有機化合物を分解し除去させる方法。
- 4出来上がった白金担持超光触媒を樹脂製のへらを使用して、ガラスを清掃するように5~100nm程度に塗り伸ばし、次に不織布でできたタオル状の布で拭き取る作業によって白金担持二酸化チタンが空気と触れることができるようにしたことで昼夜を問わず空気清浄機能を長期間継続的に発揮させることを特徴とする請求項1に記載の白金を主触媒として空気中の有機化合物を分解し除去させる方法。
- 5室内の有機化合物を分解除去するに十分の紫外線量が室内で一番多く確保できる窓ガラスの室内側に塗布し、建築物に必要な塗布面積は床面積に対して換算するなら1/7以上を塗布面積にし、容積に対して換算するなら1立方メートルに対して0.08平方メートル以上を必要とすることで昼夜を問わず空気清浄機能を長期間継続的に発揮させることを特徴とする請求項1に記載の白金を主触媒として空気中の有機化合物を分解し除去させる方法。
- 6塗布されたガラスは透明になり、塗布したガラスは樹脂製のへらを使用して、ガラスを清掃するように5~100nmレベルに塗り伸ばし、次に不織布でできたタオル状の布で拭く取ることにより、塗布されたガラスを基体として塗布された白金担持超光触媒は10~30nmで塗布することができるためガラスは透明になることで昼夜を問わず空気清浄機能を長期間継続的に発揮させることを特徴とする請求項1に記載の白金を主触媒として空気中の有機化合物を分解し除去させる方法。
- 7透明性が要求されない基体としいの建物内外に使用するタイル又はコンクリートブロック材、外壁材等に塗布するときは吹きつける二種類の 液 として最初にバインダーを塗布して半渇きの間に白金担時超光触媒を付けることで昼夜を問わず空気清浄機能を長期間継続的に発揮させることを特徴とする請求項1に記載の白金を主触媒として空気中の有機化合物を分解し除去させる方法。
- 8建物内外に使用するタイル又はコンクリートブロック材、外壁材等を焼き付けて製品を製造する場合は、温度は400°C以下であれば白金担持超光触媒を焼付けしても性能は変化しないことで昼夜を問わず空気清浄機能を長期間継続的に発揮させることを特徴とする請求項1に記載の白金を主触媒として空気中の有機化合物を分解し除去させる方法。
- 9窒素化合物の分解を促進させるために、二酸化チタンの酸化熱や白金の酸化熱を利用して窒素化合物を酸化還元することができる酸化セリウムを白金担持超光触媒に加えてNO X の分解を促進させることで昼夜を問わず空気清浄機能を長期間継続的に発揮させることを特徴とする請求項1に記載の白金を主触媒として空気中の有機化合物に加えて窒素化合物を分岐し除去させる方法。
- 10白金担持超光触媒のため、空気中の有機化合物の吸着分解を白金側で行い、酸素の酸化還元を二酸化チタン側で行うための空気中のシックハウスの原因物質や花粉症の原因の花粉を分解し、アトピー性皮膚炎、アトピー性喘息およびアトピー性鼻炎の原因であるダニの糞の分解速度が速くなることで昼夜を問わず空気清浄機能を長期間継続的に発揮させることを特徴とする請求項1に記載の白金を主触媒として空気中の有機化合物に加えて窒素化合物を分解し除去させる方法。
- 11白金担持超光触媒は撥水性であるため無機質の汚れがつきにくいことで昼夜を問わず空気清浄機能を長期間継続的に発揮させることを特徴とする請求項1に記載の白金を主触媒として空気中の有機化合物を分解し除去させる方法。
- 12清掃用部材と、 バインダーと粒径6nm以上10nm未満の二酸化チタンと二酸化チタンの含有量に対して5~50%の白金とを含有する 白金担持超光触媒表面塗布剤を含浸した白金担持超光触媒表面塗布部材と、拭取り用部材とを備えた白金担持超光触媒物品であって、 前記清掃用部材は、窓ガラスなどの基体表面を清掃するものであり、 前記白金担持超光触媒表面塗布部材は、前記基体表面を前記清掃用部材で清掃した後、前記基体表面に前記白金担持超光触媒表面塗布剤を塗布するものであり、 前記拭取り用部材は、前記基体表面に前記白金担持超光触媒表面塗布剤を塗布した後、前記基体表面を拭き仕上げるものであることで昼夜を問わず空気清浄機能を長期間継続的に発揮させることを特徴とする請求項1に記載の白金を主触媒として空気中の有機化合物を分解し除去させる方法に使用するための白金担持超光触媒物品。
- 13清掃用部材、白金担持超光触媒表面塗布部材、拭取り用部材は、それぞれ独立に密閉包装袋に内包され、前記白金担持超光触媒表面塗布部材を内包する密閉包装袋は、光不透過性の部材で形成されていることを特徴とする請求項12に記載の白金担持超光触媒物品。
- 14基体はガラスであり、 清掃用部材、白金担持超光触媒表面塗布部材及び拭取り用部材は、何れも、超極細化学繊維の多孔質不織布を用いることを特徴とする請求項12又は13に記載の白金担持超光触媒物品。
- 15基体に、少なくともバインダ剤と有機溶剤と 粒径6nm以上10nm未満の二酸化チタンと二酸化チタンの含有量に対して5~50%の白金と を含有する白金担持超光触媒下地剤を塗布して前記基体の上に白金担持超光触媒下地層を形成し、 この白金担持超光触媒下地層に、少なくとも白金担持超光触媒組成物と分散剤とを含有する表面塗布剤を塗布して前記白金担持超光触媒下地層の上に白金担持超光触媒層を形成することを特徴とする請求項1に記載の白金を主触媒として空気中の有機化合物を分解し除去させる方法に使用するための白金担持超光触媒層の形成方法。
- 16バインダ剤は、変性エポキシ樹脂または酸化珪素(SiO 2 )のいずれか一つを含有していることを特徴とする請求項15に記載の白金担持超光触媒層の形成方法。
- 17少なくとも 粒径6nm以上10nm未満の二酸化チタンと二酸化チタンの含有量に対して5~50%の白金とを含有する 白金担持超光触媒組成物と、バインダ剤と、油成分を含有するバインダ補助剤と、を含有してなる白金担持超光触媒体において、 分散剤を含有する構成であることを特徴とする請求項1に記載の白金を主触媒として空気中の有機化合物を分解し除去させる方法に使用するための白金担持超光触媒体。
- 180.1~20質量%の 、粒径6nm以上10nm未満の二酸化チタンと二酸化チタンの含有量に対して5~50%の白金とを含有する 白金担持超光触媒組成物と、 0.1~20質量%のバインダ剤と、 20~70質量%の有機溶剤を含有するバインダ補助剤と、 0.01~1質量%の分散剤と、を含有することを特徴とする請求項1に記載の白金を主触媒として空気中の有機化合物を分解し除去させる方法に使用するための白金担持超光触媒体。
- 190.1~20質量%の 、粒径6nm以上10nm未満の二酸化チタンと二酸化チタンの含有量に対して5~50%の白金とを含有する 白金担持超光触媒組成物と、 0.1~20質量%のバインダ剤と、 20~70質量%の油成分を含有するバインダ補助剤と、 0.1~1質量%の研磨剤と、 0.01~1質量%の分散剤と、を含有することを特徴とする請求項1に記載の白金を主触媒として空気中の有機化合物を分解し除去させる方法に使用するための白金担持超光触媒体。
- 20分散剤は、アミノ酸を含有していることを特徴とする請求項17~19に記載の白金担持超光触媒体。
- 21分散剤は、ショ糖脂肪酸エステルを含有していることを特徴とする請求項17~20に記載の白金担持超光触媒体。
- 22分散剤は、ポリフェノール類を含有していることを特徴とする請求項17~21に記載の白金担持超光触媒体。
Independent claims22
8 paragraphs, as filed
The present invention relates to various related techniques for maximizing the air cleaning effect using a photocatalyst such as titanium dioxide, and specifically relates to the following techniques. That is, we are trying to propose a new method that makes it possible to remove harmful organic compounds in the air day and night by using platinum as a main catalyst and a photocatalytic substance as an auxiliary catalyst. Further, the present invention relates to a photocatalyst article, and more particularly to a photocatalyst article capable of easily applying the photocatalyst article to a substrate surface such as a window glass. The present invention also relates to a method for forming a photocatalyst layer that excites a photocatalyst composition with light such as ultraviolet rays to decompose and remove dirt and harmful organic substances adhering to the substrate. Further, the present invention relates to a photocatalyst which is provided on a substrate such as a plastic plate or a glass plate and which excites a photocatalyst composition by light such as ultraviolet rays to decompose and remove stains and harmful organic substances adhering to the substrate.
Many proposals have been made so far for methods for removing harmful organic substances in the air using photocatalytic substances such as titanium dioxide and related technologies related to them. That is, conventionally, the photocatalyst is applied to the window glass in the room by a conventional method such as dipping, spraying, spin coating, roll coating, doctor plaid, etc., and the photocatalyst film is coated with a photocatalyst paint and heat-dried, or , A method for easily forming a film by a coating method using a binder (without firing) is disclosed (see, for example, Patent Document 1). Further, conventionally, as a method for removing dirt and harmful organic substances adhering to the surface of a substrate, a method of decomposing and removing using a photocatalyst composition is known. In this case, in order to decompose an organic substance such as dirt, it is necessary to irradiate the photocatalyst composition with light such as ultraviolet rays in a state where the organic substance or the like is in contact with the photocatalyst composition. Therefore, the photocatalyst composition is exposed on the outermost surface. Without it, it will not be effective. Therefore, conventionally, a surface coating agent containing a photocatalyst composition and a binder agent, or in some cases, a liquid photocatalyst containing an organic solvent or the like is directly applied onto a substrate, and then the binder agent or the like is wiped off. As a result, the photocatalyst composition was exposed on the outermost surface to form a photocatalyst layer (see Patent Document 2).<patcit num="1"><text>Japanese Unexamined Patent Publication No. 11-323188</text></patcit><patcit num="2"><text>Japanese Unexamined Patent Publication No. 2004-230263</text></patcit>
<p> Conventionally, a method of purifying air using a photocatalytic reaction made of titanium dioxide as a main means has been considered. For sunlight, which is natural light, 350 to 1500 μW / cm near the inside of the window glass on a sunny day<sup>2</sup>There is a light source. However, since it does not work at night, there is a drawback that the purification function cannot be performed by using a photocatalytic reaction. However, if it is assisted by artificial light, energy will be consumed and resources will be wasted. Also, NO on the outer walls of buildings and roads<sub>x</sub>For other functions of removing dirt, the light source is unreasonable with the photocatalyst using titanium dioxide of the prior art. Further, in the prior art, since the photocatalyst is contained in the binder and the photocatalyst is not sufficiently applied to the surface of the binder in a cueed state, the effect of the photocatalyst is observed so that the organic matter removal rate is lowered when the amount of the binder is large. There was a problem that it could not be fully exhibited. The present invention provides a photocatalytic article that eliminates the above problems. Further, in the prior art, the surface coating agent is applied to a substrate on which a photocatalyst layer is formed having irregularities larger than the particle size of the photocatalyst composition or having holes such as a screen door. In this case, when the binder agent or the like is wiped off, the photocatalyst composition and the binder agent are accumulated in the recesses and holes of the substrate, and the photocatalyst composition is not sufficiently exposed on the outermost surface. There was a problem that it could not be done. The present invention has been made to solve the above-mentioned problems, and is a case where the surface of the substrate has irregularities larger than the particle size of the photocatalyst composition or the substrate has holes. Another object of the present invention is to provide a method for forming a photocatalyst layer capable of sufficiently exposing and fixing the photocatalyst composition to the outermost surface. Furthermore, the photocatalyst composition is a very small granular substance with a diameter of about 6 to 10 nanometers, and when it is mixed with a binder agent, an organic solvent, etc. and liquefied so that it can be applied onto a substrate, a large number of photocatalyst compositions can be obtained. Particles of a substance aggregate to form large particles (hereinafter referred to as "secondary particles"), and these secondary particles are localized on the substrate. Therefore, depending on the site on the substrate, the photocatalytic composition No matter was applied, and organic matter such as dirt could not be sufficiently decomposed and removed. The present invention has been made to solve the above-mentioned problems, and to provide a photocatalyst capable of suppressing the formation of secondary particles and evenly dispersing the particles of the photocatalyst composition on a substrate. I am aiming.</p>
<p> The present invention was devised after repeated studies in order to solve such problems in the prior art, and a method of utilizing platinum as a main catalyst by changing the viewpoint of the conventional concept of a photocatalyst using titanium dioxide was considered. It was. That is, the problem can be solved by a method of compensating for the shortcomings of the photocatalyst and fully exerting the adsorption and decomposition functions of platinum. Specifically, it is as follows. (1) Based on the technical idea of using platinum as the main catalyst and titanium dioxide as a photocatalyst as an auxiliary catalyst, a binder, platinum and titanium dioxide are mixed and applied to the substrate, and the content of titanium dioxide is 0.05 to 50. Platinum as a% adsorbs organic compounds at room temperature even in the absence of light, and at the time of adsorption, platinum adsorbs and decomposes organic compounds in the air, and if left as it is, the platinum is covered with the decomposed substance in a few hours. Since it becomes a catalyst poison and does not adsorb and decompose, the substance covered on the surface of platinum is oxidized by a photocatalyst in the daytime when it is exposed to sunlight to remove the catalyst poison, and platinum without the catalyst poison recovers the adsorption resolution. However, a method of decomposing and removing organic compounds in the air using platinum as the main catalyst, which is effective in combination with titanium dioxide that undergoes a photocatalytic reaction during the day and is adsorbed and decomposed with platinum at night. (2) Platinum decomposes and adsorbs organic compounds in the air at night when there is no light, and in the daytime titanium dioxide uses light with a wavelength of 390 nm or less of sunlight to cause a photocatalytic reaction and oxidize the catalytic poison around platinum. A method for decomposing and removing an organic compound in the air using platinum as a main catalyst according to item (1), which is characterized in that the organic compound can be decomposed and removed for 24 hours. (3) Since it is a photocatalyst mainly composed of platinum, it is hereafter referred to as a platinum-supported superphotocatalyst. In order for the platinum-supported superphotocatalyst to exert its function, platinum and titanium dioxide must be in contact with air. In addition, platinum particles and titanium dioxide particles must be moderately agitated and mixed and supported, so diatomaceous soil is made into a fine powder of 20 nm to 100 nm as a binder so that it can be spread well when applied, and vegetable oil, which is a binder auxiliary material, is used. In addition, ethylene glycol is added as an antifreeze solution so that it can be used in cold regions as needed, and taurine and catechin are added as diffusing materials. A method of decomposing and removing organic compounds. (Four) Using a resin spatula, spread the finished platinum-supported superphotocatalyst to about 5 to 100 nm to clean the glass, and then wipe it off with a towel-like cloth made of non-woven fabric to release the platinum-supported titanium dioxide with air. A method for decomposing and removing an organic compound in the air using platinum as the main catalyst according to item (1), which is characterized by being touchable. (5) If the amount of ultraviolet rays sufficient to decompose and remove organic compounds in the room is applied to the indoor side of the window glass that can secure the largest amount in the room, and the application area required for the building is converted to the floor area, 1 The organic compound in the air using platinum as the main catalyst according to item (1), which is characterized by requiring 0.08 square meters or more per cubic meter when the coating area is 7 or more and converted to volume. How to disassemble and remove. (6) The applied glass becomes transparent, and the applied glass is spread to a level of 5 to 100 nm so as to clean the glass using a resin spatula, and then wiped with a towel-like cloth made of non-woven fabric. The platinum-supported superphotocatalyst coated using the coated glass as a substrate can be coated at 10 to 30 nm, so that the glass becomes transparent. The platinum as described in item (1) is used as the main catalyst in the air. A method of decomposing and removing organic compounds in the glass. (7) When applying to tiles or concrete block materials, outer wall materials, etc. used inside and outside the building as a substrate that does not require transparency, first apply a binder as two types of liquid to be sprayed, and then platinum during half-thirst. A method for decomposing and removing an organic compound in the air using platinum as the main catalyst according to item (1), which comprises attaching a supported superphotocatalyst. (8) When manufacturing products by baking tiles or concrete block materials, outer wall materials, etc. used inside and outside the building, if the temperature is 400 ° C or less, the performance will not change even if the platinum-supported superphotocatalyst is baked. A method for decomposing and removing an organic compound in the air using platinum as the main catalyst according to item (1). (9) In order to accelerate the decomposition of nitrogen compounds, cerium oxide, which can oxidize and reduce nitrogen compounds by utilizing the heat of oxidation of titanium dioxide and the heat of oxidation of platinum, is added to the platinum-supported superphotocatalyst and NO.<sub>x</sub>A method for decomposing a nitrogen compound in addition to an organic compound in the air using platinum as the main catalyst according to item (1), which is characterized by accelerating the decomposition of the above. (10) Since it is a platinum-supported superphotocatalyst, organic compounds in the air are adsorbed and decomposed on the platinum side, and oxygen is oxidized and reduced on the titanium dioxide side. The organic compound in the air using platinum as the main catalyst according to item (1), which is characterized by a high decomposition rate of tick feces, which is the cause of decomposition, atopic dermatitis, atopic asthma and atopic rhinitis. How to disassemble and remove. (11) The method for decomposing and removing organic compounds in the air using platinum as the main catalyst according to item (1), which is characterized in that the platinum-supported superphotocatalyst is water-repellent and therefore does not easily stain inorganic substances. The photocatalyst article according to claim 12 of the present invention for achieving the above object is a photocatalyst article including a cleaning member, a photocatalyst surface coating member impregnated with a photocatalyst surface coating agent, and a wiping member. The cleaning member cleans the surface of a substrate such as a window glass, and the photocatalyst surface coating member cleans the surface of the substrate with the cleaning member and then coats the surface of the photocatalyst with the photocatalyst surface. The agent is applied, and the wiping member is formed by applying the photocatalyst surface coating agent to the surface of the substrate and then wiping the surface of the substrate. The photocatalyst article according to claim 13 is the photocatalyst article according to claim 12, wherein the cleaning member, the photocatalyst surface coating member, and the wiping member are independently enclosed in a sealed packaging bag, and the photocatalyst surface coating member is used. The enclosed sealed packaging bag is made of a light-impermeable member. The photocatalyst article according to claim 14 is the photocatalyst article according to claim 12 or 13, wherein the substrate is glass, and the cleaning member, the photocatalyst surface coating member, and the wiping member are all ultrafine. A porous non-woven fabric made of chemical fibers is used. Further, the means according to claim 15 is to apply a photocatalyst base material containing at least a binder agent and an organic solvent to the substrate to form a photocatalyst base layer on the substrate, and at least the photocatalyst base layer is formed on the photocatalyst base layer. This is a method for forming a photocatalyst layer by applying a surface coating agent containing a composition and a dispersant to form a photocatalyst layer on the photocatalyst base layer. The means according to claim 16 is the invention according to claim 15, wherein the binder is a modified epoxy resin or silicon oxide (SiO).<sub>2</sub>) Is a method for forming a photocatalyst layer containing any one of the above. Furthermore, the means according to claim 17 is a photocatalyst having a structure containing a dispersant in a photocatalyst containing at least a photocatalyst composition, a binder agent, and a binder auxiliary agent containing an oil component. is there. The means according to claim 18 are a photocatalyst composition of 0.1 to 20% by mass, a binder agent of 0.1 to 20% by mass, a binder auxiliary agent containing 20 to 70% by mass of an oil component, and 0.01 to 1% by mass. It is a photocatalyst having a composition containing the dispersant of. The means according to claim 19 are a photocatalyst composition of 0.1 to 20% by mass, a binder agent of 0.1 to 20% by mass, a binder auxiliary agent containing 20 to 70% by mass of an oil component, and 0.1 to 1% by mass. It is a photocatalyst having a constitution containing 0.01 to 1% by mass of the abrasive and 0.01 to 1% by mass of the abrasive. The means according to claim 20 is the photocatalyst according to claims 17 to 19, and the dispersant is a photocatalyst having a constitution containing an amino acid. The means according to claim 21 is the photocatalyst according to claims 17 to 20, and the dispersant is a photocatalyst having a constitution containing a sucrose fatty acid ester. The means according to claim 22 is the optical medium according to claims 17 to 21, and the dispersant is an optical medium having a constitution containing polyphenols.</p>
<p> Based on the technical idea of using platinum as the main catalyst, platinum, which is a mixture of binder, platinum and titanium dioxide and applied to the substrate to make the content of titanium dioxide 0.05 to 50%, is at room temperature even in the absence of light. At the time of adsorption, platinum decomposes organic compounds in the air, and if left as it is, platinum will be covered with the decomposed substance in a few hours and will not be adsorbed or decomposed. In the daytime, the photocatalyst oxidizes the substance covered on the surface of platinum to remove the catalytic poison, and the platinum without the catalytic poison undergoes adsorption decomposition, and in the daytime, it is effective when used in combination with titanium dioxide, which undergoes a photocatalytic reaction. At night, it is a method of decomposing and removing organic compounds in the air using platinum, which is adsorbed and decomposed with platinum, as the main catalyst. By efficiently combining with the ability of the photocatalytic material, air purification, day and night, will be efficiently realized. In addition, since it is sufficient for titanium dioxide to exert a photocatalytic effect with light having a wavelength of 390 nm or less, it is possible to continue the effect of the present invention 24 hours a day by using ordinary sunlight shining into a room from the outdoors. Become. By using a platinum-based platinum-supported super photocatalyst in which titanium dioxide, which is a photocatalyst, is supported on platinum far exceeding the conventional level, the air cleaning effect can be maintained for a long time even in the absence of light. Titanium dioxide, which supports a sufficient amount of platinum, effectively contacts the air by spreading it on the surface of transparent window glass, which is the substrate, to a thickness of 5 to 100 nm using a spatula, and then wiping it off with a cloth such as non-woven fabric. Therefore, an efficient air cleaning function is realized. The air cleaning effect according to the present invention is fully exhibited by setting the coating area to 1/7 or more when converted to the floor area and 0.08 square meters or more per cubic meter when converting to the volume. I confirmed that I could do it. It has been found that the transparency of the transparent glass as a substrate can be ensured by making the coated platinum-supported superphotocatalyst as thin as 10 to 30 nm. When applying to tiles or concrete block materials, outer wall materials, etc. used inside and outside the building as a substrate that does not require transparency, first apply a binder as two types of liquids to be sprayed, and then apply platinum during half-thirst. By attaching a photocatalyst, the most effective coating state can be realized according to the characteristics of the substrate. When manufacturing products by baking tiles or concrete block materials, outer wall materials, etc. used inside and outside the building, we found that the performance does not change even if platinum-supported supercatalyst baking is performed if the temperature is 400 ° C or less. Simple construction on such a substrate has been realized. In order to promote the decomposition of nitrogen compounds, cerium oxide, which can oxidize and reduce nitrogen compounds by utilizing the heat of oxidation of titanium dioxide and the heat of oxidation of platinum, is added to the platinum-supported supercatalyst and NO.<sub>x</sub>We found that it promotes the decomposition of air, and showed the possibility of air purification for various substances. Because it is a platinum-supported superphotocatalyst, the adsorption and decomposition of organic compounds in the air are performed on the platinum side, and the oxidation and reduction of oxygen is performed on the titanium dioxide side, so the causative substances of sick house in the air and pollen that causes pollinosis are decomposed and atopy. It is an effective invention for many symptoms because it accelerates the decomposition rate of tick feces that cause atopic dermatitis, atopic asthma and atopic rhinitis. Since the platinum-supported superphotocatalyst is water-repellent, it has been found that it is difficult for inorganic stains to adhere to it, and it is possible to make it difficult for the effect to be reduced due to surface stains. According to the photocatalyst article according to claim 12, the photocatalyst article includes a cleaning member, a photocatalyst surface coating member impregnated with a photocatalyst surface coating agent, and a wiping member, and the cleaning member is a window. The photocatalyst surface coating member cleans the surface of a substrate such as glass, and the photocatalyst surface coating member applies the photocatalyst surface coating agent to the surface of the substrate after cleaning the surface of the substrate with the cleaning member. Since the removing member is formed by applying a photocatalyst surface coating agent to the surface of the substrate and then wiping the surface of the substrate, a simple procedure of cleaning member photocatalyst surface coating member wiping member is used in the room. The photocatalytic composition is fixed to the surface of a substrate such as a window glass, finished with a wiping member, and the indoor air can be purified by the photocatalytic effect of decomposing floating organic substances. Further, according to the photocatalyst article according to claim 13, in addition to the effect of the invention of claim 12 described above, the cleaning member, the photocatalyst surface coating member, and the wiping member are each independently contained in a sealed packaging bag. Therefore, the photocatalyst composition can be easily fixed to the surface of a substrate such as a window glass in a room by the procedure of using a cleaning member a photocatalyst surface coating member a wiping member without using a coating device such as a spray. Moreover, since the closed container containing the photocatalyst surface coating member is formed of a light-impermeable member, deterioration of the photocatalyst surface coating agent impregnated in the photocatalyst surface coating member can be prevented. Further, according to the photocatalyst article according to claim 14, in addition to the effects of the invention according to claim 12 or 13, the cleaning member, the photocatalyst surface coating member and the wiping member are all ultrafine chemical fibers. Since the porous non-woven fabric of No. 1 is used, it is possible to prevent the surface of the glass as the substrate from being damaged. Further, in the method for forming the photocatalyst layer according to the present invention, since the photocatalyst base layer is formed on the substrate and the photocatalyst layer is formed on the photocatalyst base layer, the particle size of the photocatalyst composition is larger than that on the surface of the substrate. Even when there are irregularities or holes in the substrate, the photocatalyst composition can be exposed to the outermost surface and fixed, and the effect of the photocatalyst composition can be exhibited. Further, in the present invention, at least a photocatalyst, a binder agent, and an oil component are contained, and if necessary, a liquid photocatalyst containing a binder auxiliary agent contains a dispersant. It is possible to suppress the formation of secondary particles, prevent the localization of the photocatalyst composition on the substrate, and evenly disperse the particles of the photocatalyst composition on the substrate. Become. Further, since the photocatalyst contains amino acids, sucrose fatty acid esters, and polyphenols as the dispersant, it is possible to enhance the dispersibility of the particles of the photocatalyst composition contained in the photocatalyst.</p>
A specific embodiment of the method for decomposing and removing an organic compound in the air using platinum of the present invention as a main catalyst will be described. First, in order to appropriately decompose and remove organic compounds and the like to exert an air cleaning effect, the technical idea of using platinum as a main catalyst and titanium dioxide as a photocatalytic substance as an auxiliary catalyst will be described. Is based on the idea of decomposing and removing organic compounds in the air using photocatalytic oxidation / reduction reactions when purifying air using photocatalytic substances such as titanium dioxide. As has been done, the origin of the present invention is to investigate the cause of the fact that the theoretical result cannot be easily obtained. That is, in order to achieve a more efficient air cleaning effect with the photocatalyst substance, the photocatalyst substance particles are evenly dispersed by the method for forming the photocatalyst layer, the article for realizing an effective coating state on the substrate, and the dispersant. Although diligent research and development has been carried out regarding methods, etc., the current situation is that the results according to the theory have not yet been obtained. In the process of investigating the cause of the current situation, the inventor uses a photocatalytic substance containing a very small amount of platinum as an auxiliary agent that fulfills an auxiliary function, and the inventor emits light from the outside like at night. We focused on the fact that the air purifying effect continues repeatedly for a certain period of time even when the air is cut off. In other words, if the air purifying effect is achieved only by the photocatalytic action, the effect should not be exhibited when the light beam is blocked, but the effect should be sustained due to a cause other than the photocatalytic action. Yes, I did the investigation. Here, the inventor paid attention to the fact that platinum contained in a very small amount as an auxiliary agent also has a redox action as a catalyst, but when platinum functions as a catalyst, its surface is covered with a decomposing substance, and this There is a drawback that the effective effect cannot be maintained unless the surface catalytic poison (substance that inhibits the catalytic function) is continuously removed. The inventor repeated studies to overcome this difficulty, and by continuously removing the catalytic toxic substance on the platinum surface by the decomposition and removal function of organic compounds, etc., which applied the redox action of the photocatalytic substance, the presence or absence of light rays was determined. Regardless of the day and night, it has made it possible to continuously exert the air purification function for a long period of time . That is, the inventor has reached a new idea that platinum is used as the main catalyst that performs the air purification function, and a photocatalytic substance such as titanium dioxide is supplementarily used to remove the catalytic poison on the surface of platinum. , The present invention has been completed. Specifically, using platinum as the main catalyst sufficiently fulfills the function of decomposing and removing organic compounds and the like to purify the air by decomposing and removing platinum, which was added in an extremely small amount even if it was added in the prior art. In order to achieve this, a considerable amount is evenly supported on titanium dioxide, which is a photocatalytic substance, and the content is 0.05 to 50%, more preferably 5 to 30%, based on the titanium dioxide content. Is. In other words, it does not mean that it occupies the main amount as the content, but that it plays the main role in fulfilling the function of air purification. In Fig. 1, the platinum-supported photocatalyst according to the present invention is applied to the window glass and walls of a laboratory in which new furniture is placed in a newly constructed room, and the formaldehyde concentration in the room is measured every 30 minutes. It is a graph showing an example of the result when the function of the air purification function according to the present invention is tested after a lapse of time, and it is understood that the formaldehyde concentration is kept low day and night (note that the graph). Shows the results up to the lapse of 24 hours, but it has been confirmed that the same effect can be sustained even if the experiment is continued after that). The graph shows the temperature and humidity conditions related to the amount of formaldehyde generated and the change in the amount of ultraviolet rays in the room related to the action of the photocatalytic substance by the change in the measurement time. In other words, formaldehyde in the laboratory evaporates more when the temperature inside the room rises, so the amount of sunlight from the outside is small, and the amount of ultraviolet rays from the outside is small, so the photocatalyst functions. It is difficult to do, and it occurs frequently in the daytime on cloudy or rainy days. On the other hand, photocatalytic substances such as titanium dioxide receive a lot of sunlight and work more in the daytime on a sunny day with a large amount of ultraviolet rays. Interpreting the experimental results in Fig. 1 on the premise of the above, it can be understood that the slight increase in formaldehyde concentration in the laboratory in the morning is due to the temperature rise in the laboratory. In addition, it can be understood that the formaldehyde concentration is suppressed below a certain value in the daytime when the amount of ultraviolet rays in the laboratory is abundant because of the air purification function of the photocatalytic substance (naturally affected by other conditions such as temperature). Yes). Furthermore, it can be understood that the reason why the formaldehyde concentration rises from the evening to the night is that the sunlight disappears and the ultraviolet rays do not enter the room, so that the photocatalytic action is not performed. However, when interpreted only from the above assumptions, the formaldehyde concentration should rise clearly at night (from 19:00 to before dawn) when the amount of ultraviolet rays in the laboratory is significantly low, but it is shown in the graph. As can be seen from the experimental results, on the contrary, the formaldehyde concentration in the laboratory remains low even in such an environment where the amount of ultraviolet rays is absolutely low (again, under other conditions such as room temperature). Certainly there is an impact). It is considered that such a result is because an amount of platinum sufficient to purify the air in the laboratory is appropriately supported on a photocatalytic substance such as titanium dioxide. That is, since the platinum-catalyzed air purification function is not limited by the amount of ultraviolet rays in the room, it is considered that it functions effectively even at night. Furthermore, platinum, which would otherwise have its surface covered with degrading substances such as organic compounds in the air and lose its air purification function due to catalytic poisoning, continues for many days beyond theoretical expectations. It is interpreted that platinum, which is supported on the photocatalytic substance in an appropriate state, can eliminate the decomposing substance (catalytic toxic substance) that covers the surface by using the photocatalytic action. Will be done. That is, a photocatalytic substance such as titanium dioxide plays a role of removing a catalytic toxic substance on the surface of platinum that is appropriately supported by a photocatalytic action using ultraviolet rays. For example, platinum whose surface is covered with a catalytic toxic substance by an adsorption action during the nighttime and thereby fulfills an air purification function is also cleaned by a photocatalytic action during the daytime of the next day, and as a result, the following It is possible to return to the state where the air purification function can be fulfilled again during the nighttime. That is, from the results shown in FIG. 1, when the platinum-supported photocatalyst of the present invention is effectively utilized, not only when abundant ultraviolet rays due to sunlight or the like are present, but also in a time zone when the photocatalytic action does not work such as at night. The air purification function continues due to the catalytic action of platinum supported on a photocatalytic substance such as titanium dioxide as the main catalyst, and the catalytic toxic substance that has covered the platinum surface due to the photocatalytic reaction during the day is appropriately removed. This explains that the air purification function will continue to work for a long period of time without a break. In addition, with regard to various pollen such as cedar pollen, which is a causative substance of so-called pollinosis allergy, there was a fact that a sufficient decomposition and removal effect could not be expected with conventional photocatalytic substances, but the main catalyst that fulfills the air purification function as in the present invention. It has been confirmed that when a sufficient amount of platinum is supported (for example, about 10%), various pollens are completely decomposed and removed in just a few hours. Hereinafter, embodiments of the photocatalytic article of the present invention will be described with reference to the drawings. The substrate (not shown) to which the photocatalyst article A is applied is glass (for example, window glass), synthetic resin, or the like. When the photocatalyst composition is fixed to the surface of the substrate and ultraviolet rays are irradiated from the back surface of the substrate (for example, when sunlight enters through the window glass), a synthetic resin that transmits ultraviolet rays is used and the surface of the substrate is used. When irradiating ultraviolet rays from, it is not necessary to use a material that transmits ultraviolet rays. The photocatalyst article A is a mixture of a cleaning member 4 of a porous non-woven fabric impregnated with a stain remover for cleaning the surface of a substrate, and a photocatalyst surface coating agent (abrasive, catalyst composition, binder, binder auxiliary agent). ) Is impregnated (penetrated) with the photocatalyst surface coating member 5 (the photocatalyst surface coating member 5 is, for example, a porous non-woven fabric) and the photocatalyst surface coating agent is applied to the substrate surface, and then the substrate surface is wiped to finish. The wiping member 6 (the wiping member 6 wipes, for example, the binder auxiliary agent) is provided, and as shown in FIG. 1, each independently has an adhesive opening / closing portion 1, 1', 1 ". It is contained in a sealed packaging bag 2, 2', 2 ". The photocatalyst article A is stored in a packaging box (not shown). The sealed packaging bag 2 containing the cleaning member 4 is sealed by a crimping portion 9 having both ends crimped, and the sealed packaging bag 2'containing the photocatalyst composition member 5 is sealed by a crimping portion 9'with both ends crimped. The hermetically sealed packaging bag 2 "which is hermetically sealed and contains the wiping member 6 is hermetically sealed by a crimping portion 9" whose both ends are crimped. Then, as will be described later, the photocatalyst composition is cueed on the surface of a substrate (not shown) such as a window glass in a room by the procedure of using the cleaning member 4 the photocatalyst surface coating member 5 the wiping member 6. The object is fixed and wiped with a finishing means so that the binder auxiliary agent is not left unwiped, and the floating organic matter is decomposed to purify the air in the room. The cleaning member 4 contains a stain remover (for example, its components include ethyl alcohol, a surfactant, tocopherol, ion-exchanged water, L-ascorbic acid, citric acid, etc.) for cleaning the surface of the substrate (not shown). The contained liquid cleaning agent) is impregnated (penetrated) into the porous non-woven fabric. Before applying the photocatalyst surface coating agent with the cleaning member 4 of the porous non-woven fabric for cleaning the substrate surface impregnated (permeated) with the stain remover, for example, stain the substrate surface (coated surface) such as window glass in a room. In particular, it removes oil from the glass surface. The photocatalyst surface coating member 5 is a porous non-woven fabric impregnated (penetrated) with a mixture of an abrasive, a photocatalyst composition, a binder agent, and a binder auxiliary agent. The cleaning member 4 or the photocatalyst surface coating member 5 described above can be produced by immersing the cleaning member 4 or the photocatalyst surface coating member 5 in the stain remover or the photocatalyst surface coating agent of the respective porous non-woven fabric. As for the cleaning member 6 of the porous non-woven fabric for wiping the binder auxiliary agent, the cleaning member 4 and the photocatalyst composition member 5 described above are used as they are without being impregnated (penetrated). As a finishing means, a waste cloth or towel having a little water (preferably moistened with hot water at about 40 ° C., or water is applied to 1/3 of the towel in the length direction, and the remaining length direction 2 / By a finishing means (not shown) such as sandwiching the wet part between the three thirsty parts and using this thirsty part as the front part on both sides), the binder auxiliary agent is left unblown on the surface of the substrate. Wipe it off so that it does not exist. The cleaning member 4, the photocatalyst surface coating member 5, and the wiping member 6 are all made of ultrafine chemical fibers, and since they are ultrafine chemical fibers, it is possible to prevent the surface of glass or the like as a substrate from being damaged. .. The hermetically sealed packaging bag 2 contains a plurality of cleaning members 4 in a hermetically sealed state, and the appearance thereof is shown in FIGS. 2 and 3. Then, the cleaning member 4 is appropriately creases in the porous non-woven fabric, appropriately formed a boundary, folded, and contained in the sealed packaging bag 2. Reference numeral 1 denotes an adhesive opening / closing part that opens / closes the take-out port 21, and a removable adhesive is applied around the take-out port 21 corresponding to the back surface of the adhesive opening / closing part 1 or the back surface of the adhesive opening / closing part 1. , The take-out port 21 can be sealed by repeating the lid. By sealing, it is possible to prevent the cleaning member 4 in the sealed packaging bag 2 from being contaminated by mold and germs (see FIGS. 2, 2, 5 and 6). The hermetically sealed packaging bag 2'contains a plurality of photocatalyst surface coating members 5 in a hermetically sealed state, and the appearance thereof is shown in FIGS. 1 and 3. Then, the photocatalyst surface coating member 5 appropriately creases the porous non-woven fabric, forms an appropriate boundary, folds the porous non-woven fabric, and encapsulates the photocatalyst surface coating member 5 in the sealed packaging bag 2'. 1'is an adhesive opening / closing part that opens / closes the take-out port 21', and the adhesive opening / closing part 1'has a removable adhesive on the back surface or around the taking-out port 21' corresponding to the back surface of the adhesive opening / closing part 1. It is coated and can be sealed by repeatedly covering the take-out port 21'. By sealing, it is possible to prevent the photocatalyst composition member 5 in the sealed packaging bag 2'from being contaminated by mold and germs. In particular, the hermetically sealed packaging bag 2'containing the photocatalyst composition member is formed of a light-impermeable member (for example, an aluminum vapor-deposited sheet). The photocatalyst composition of the photocatalyst surface coating agent impregnated (penetrated) into the photocatalyst surface coating member 5 is titanium oxide, titanium dioxide, or a solgel-type titanium compound, or zinc oxide, tin oxide, iron oxide, copper oxide, silver oxide, or oxidation. Metal oxides such as tungsten, zirconium oxide, bismuth oxide, indium oxide, cadmium oxide, germanium oxide, nickel oxide, cobalt oxide, chromium oxide, manganese oxide, vanadium oxide, niobium oxide, antimony oxide, and strontium titanate can be mentioned. , Titanium dioxide is preferable, and anatase-type titanium dioxide crystals, rutile-type titanium dioxide crystals or mixtures thereof, or solgel-type titanium compounds are preferable. As the photocatalyst formed by the photocatalyst surface coating member 5, a photocatalyst having a photocatalytic effect in the visible light region may be used. The photocatalytic composition of the photocatalyst surface coating agent impregnated (penetrated) in the photocatalyst surface coating member 5 is not limited to the above, and the photocatalyst particles have at least one metal or metal compound physically or chemically on the surface of the photocatalyst particles. It may be immobilized on (see JP-A-2000-96800). For example, there are gold, silver, copper, platinum, iron, cobalt, nickel, chromium, zinc and the like, of which platinum is most preferred. By supporting the metal on the surface of the photocatalyst, charge separation of the photocatalyst is promoted and the photocatalyst characteristics are further enhanced. A photocatalyst composition is also used when a metal is supported on the surface of the photocatalyst or a photocatalyst is supported on the surface of the metal. The amount of metal or the like immobilized is preferably 1% by weight to 50% by weight with respect to the total amount of the photocatalyst composition. Further, 0.1% by weight to 30% by weight of a photocatalyst is put into an organic solvent such as ethanol and sufficiently stirred to form a sol-gel, and a metal having a larger photocatalyst property is added and sufficiently stirred. Alternatively, the photocatalyst and a metal having higher photocatalytic properties may be mixed and put into an organic solvent such as ethanol, and sufficiently stirred to form a sol-gel. The particle size of titanium dioxide is not particularly limited, but may be 6 nm to 10 nm so that it can be easily dissolved in an organic solvent. The concentration of the photocatalyst composition contained in the solution of the organic solvent containing the photocatalyst composition is preferably 0.1% by weight to 80% by weight. If the concentration of the photocatalyst composition is less than 0.1% by weight, the effect of the photocatalyst, that is, the decomposition of pollutants is weakened, which is not preferable. The ultrafine particle solution of the photocatalyst composition includes a solution containing 30 to 60% of an organic solvent such as ethyl alcohol, isopropylene alcohol, and petit alcohol, and 1% or less of sulfuric acid and nitrate, and anatase or rutin-type titanium alkoxide crystal. An acidic suspension containing titanium dioxide that is mixed and adjusted to ~ 30%. Further, the photocatalyst composition of the photocatalyst surface coating agent impregnated (penetrated) in the photocatalyst surface coating member 5 is formed in fine powder, and the particle size thereof is 6 nm to 10 nm, which is relative to the total amount of the photocatalyst surface coating agent. It contains 0.1% by weight to 30% by weight. If it is 10 nm or more, it is difficult to dissolve in the solution of the binder agent described later, and the surface of the substrate after coating becomes cloudy and the transparency is greatly lowered. The photocatalyst surface coating agent is composed of a photocatalyst composition, a binder agent, a binder auxiliary agent and an abrasive. Further, if the blending ratio of the photocatalytic composition is less than 0.1% by weight, the harmful substance (organic compound) is not reduced and oxidized, and a sufficient photocatalytic action cannot be exhibited, which is 30% by weight. If it is more than%, the inconvenience that the transparency of the surface of the substrate cannot be obtained occurs. In the photocatalyst composition, the pH (unit indicating whether it is acidic or alkaline) is adjusted to a value of 1 to 6 by adding a conventional surfactant to maintain the pH as acidic or weakly acidic. It is hard to be oxidized, and the quality deterioration of the oil component added to the binder auxiliary agent described later can be avoided. In this adjustment, if the PH value is less than 1, the acid is too strong and the oily component described later is altered, and if it is 6 or more, the quality of the oily component cannot be maintained. The binder agent described above acts as a binder for supporting the photocatalyst composition, and for example, an appropriate composition such as a silicon-based resin, an acrylic resin, a fluorine-based resin, or an epoxy resin, or a natural glue is used. It is formed in the form of a solution having a predetermined concentration with good fluidity by a diluent such as water or ethyl alcohol. The blending ratio is adjusted to, for example, 0.1% by weight to 20% by weight with respect to the total amount of the photocatalyst surface coating agent, and when diluted, the blending with the diluent: binder liquid is 70% by weight. ~ 99.9% by weight: 30% by weight ~ 0.1% by weight is preferable. The binder auxiliary agent described above is for applying the photocatalyst composition to the surface of the substrate (object to be coated) as thinly as possible. This binder auxiliary agent has an oil component, and the oil component is composed of, for example, a wax derived from a natural product, a mineral spirit solvent, a vegetable oil, or the like, and a conventional surfactant. Among the oil components, natural product-derived waxes include, for example, carbanar wax, candelilla wax, rice bran wax, auricula wax, sugar cane wax, jojoba wax, oil seed wax, mokuro, urshiro, and beeswax, and at least from this group. Just choose one type. These oil components exhibit water repellency, have a glossy coating surface, and have the property of being compatible with synthetic resins. In addition, it has good coating film physical characteristics, has alkali resistance, weather resistance, and quick-drying properties, and it is good for painting work by the painting method usually used for repairs such as sprays, brushes, and rollers, and it is toxic. Use a small amount of mineral spirit solvent as a component of the binder auxiliary agent. Examples of the mineral spirit in the binder auxiliary agent described above include mineral tarpen, white spirit, mineral thinner, petrolium spirit, and the like, and at least one type may be selected from this group. Further, the vegetable oil in the binder auxiliary agent described above has the property of a non-drying oil, and it is desirable that the vegetable oil is not easily oxidized or deteriorated. That is, any material can be selected as long as it is a thin and well-extended material, such as camellia oil, olive oil, sesame oil, soybean oil, safflower oil, rapeseed oil or evening primrose oil, at least from this group. You only have to choose one type. Further, if necessary, an antioxidant may be added to the photocatalyst surface coating agent for the purpose of preventing discoloration due to oxidation of the above-mentioned vegetable oils and waxes. For example, tylhydroxytoluene is added to the photocatalyst surface coating agent. Toluene, tocopherol, fuitic acid and the like are used. In addition, phenolic substances, aromatic amines, phenothiazines, dithiophosphates, dithiocarbamate, sulfides, olephine sulfide and the like can also be used. Further, for the antioxidant of vegetable oil, L-ascorbic acid fatty acid ester, L-ascorbic acid palmitic acid ester and / or L-ascorbic acid stearic acid ester and the like are effective. In addition, as antioxidants for food additives, L-ascorbic acid, sodium L-ascorbic acid (vitamin C), Ca diNa ethylenediamine tetraacetate, diNa ethylenediamine tetraacetate, elsorbic acid, sodium elsorbate, guayaku fat, citrus Addition of foods such as isopropyl acid acid, nordihydroguayaletic acid, propyl acidaborate, dibutylhydroxytoluene (BHT), dl-α-tocopherol (vitamin E), butyl hyderoxyanisole (BHA), rosemary extract, ethoxyquin, etc. As antiseptic agents for foods, benzoic acid, sodium benzoate, sorbic acid, potassium sorbate, sodium devidroacetate, isobutyl paraoxybenzoate, isopropyl paraoxybenzoate, ethyl paraoxine benzoate, butyl paraoxine benzoate, paraoxine benzoic acid You may use propyl, propionic acid, sodium propionate, calcium propionate and the like. At least one of these antioxidants may be added. Next, a method for applying the photocatalyst surface coating agent to the substrate surface and the photocatalyst surface coating agent according to the present invention will be described. A liquid photocatalyst surface coating agent is obtained by mixing an ultrafine solution of the photocatalyst composition, a binder agent, a binder auxiliary agent containing an oil component, and an abrasive, and the photocatalyst surface coating agent is impregnated (penetrated). The photocatalyst surface coating member 5 is applied to the surface of the substrate and stretched thinly to form a photocatalyst layer on the surface of the substrate. The photocatalyst composition is exposed on the outermost surface of the photocatalyst layer by removing it with the wiping member 6 together with the polishing agent contained in the layer of No. 1 and finishing so that the binder auxiliary agent is not left unwiped. Then, the above-mentioned abrasive is formed into 0.1 micron to 0.5 micron particles by a material such as silica or ceramic, and is added to the photocatalyst surface coating agent and mixed. If the particles of the abrasive are less than 0.1 micron, there is a problem that both the photocatalyst composition and the binder are wiped off when wiping the photocatalyst layer, and if it is 0.5 micron or more, the entire photocatalyst layer is this. It causes the inconvenience of being removed by the abrasive. In mixing this abrasive, it may be added to a binder agent, a binder auxiliary agent, or the like and then mixed, and in the mixing ratio thereof, 10% by weight to 50% by weight is mixed and mixed. If the amount of the abrasive added is less than 10% by weight, the photocatalyst surface coating agent solidifies before being applied to the substrate surface, causing inconvenience in the coating process, and if it is 50% by weight or more, it becomes water-soluble. It is too much to be applied by the photocatalyst surface coating member 5. The photocatalyst composition, binder agent, binder auxiliary agent, and abrasive may be added at once in an appropriate container, diluted to a predetermined concentration with a diluting solution such as ethyl alcohol or water, and made into a solution. It is possible, and each compounding ratio can be arbitrarily selected within the compounding range shown in the present embodiment. The following are examples of photocatalytic surface coating agents. Example of compounding with and without photocatalyst surface (Of course, it is not limited to this compounding ratio.) Photocatalytic composition ...... 5% by weight Binder agent ...... 5% by weight Binder auxiliary agent ...... 65% by weight ·Abrasive ...... 25% by weight Was added and mixed evenly with stirring to obtain a liquid photocatalyst surface coating agent. The photocatalyst article A is taken out from a packaging box (or packaging bag) (not shown) (the taken-out state is shown in FIG. 1), the airtight opening / closing part 1 is peeled off, the cleaning member 4 is removed from the outlet 21, and the airtight opening / closing part 1 is removed. The photocatalyst surface coating member 5 is taken out from the outlet 21'by peeling off the', and the wiping member 6 is taken out from the outlet 21'by peeling off the airtight opening / closing part 1'. A photocatalyst surface coating member in which a cleaning member 4 impregnated with a stain remover, for example, cleans the substrate surface of a window glass in a room and is impregnated with a mixture of a polishing agent, a catalyst composition, a binder agent, and a binder auxiliary agent. In step 5, the photocatalyst composition is fixed to the substrate surface of the window glass in the room by cueing, and the binder auxiliary agent unnecessary for cueing and fixing the photocatalyst composition is removed by the wiping member 6 and the finishing means, and the window glass in the room is used. The photocatalyst composition is fixed to the surface of the substrate such as. Through a series of operations, the photocatalytic composition is transparently applied to the surface of the window glass in the room. The state in which the photocatalyst composition is applied can be confirmed with a rough feel by simply touching the window glass in the room with a fingertip. The above photocatalyst article is not necessarily related to a platinum-supported photocatalyst, but it is clear that it is useful when a platinum-supported photocatalyst is actually used. An embodiment of the method for forming a photocatalyst layer of the present invention will be described with reference to FIG. In the figure, 1 is a substrate, 2 is a photocatalyst base material applied on the substrate 1, and 3 is a surface coating agent applied on the photocatalyst base material 2. The substrate 1 is a target for decomposing and removing organic substances such as dirt, and is a carrier on which the photocatalyst composition 31 described later is provided. Examples of the substrate 1 include non-woven fabrics, screen doors, roll curtains, air conditioner filters, resin plates, building exterior wall materials, tents, tents, concrete blocks, and the like. The photocatalyst base material 2 contains a binder agent 21 for fixing the photocatalyst composition 31, and the binder agent 21 and the organic solvent 22 are mixed in a predetermined ratio, for example, 0.1% by mass or more as the binder agent 21. 10% by mass silicon oxide (SiO)<sub>2</sub>) Is mixed with an organic solvent 22 such as ethanol to make it liquid, or 0.1% by 10% by mass of a modified epoxy resin as a binder 21 is mixed with butyl acetate, cyclohexane, propylene glycol monomethyl ether, propylene glycol methyl ether acetate, etc. Is used, which is liquefied by mixing with an organic solvent 22 containing. The photocatalyst base material 2 may be mixed with a dispersant 32 or the like, which will be described later, in order to further disperse the binder agent 21. The surface coating agent 3 contains a photocatalyst composition 31 that decomposes organic substances such as stains, and contains 0.1% by mass to 20% by mass of the photocatalyst composition 31 and 0.01% by mass to 1% by mass of the dispersant 32 in ethanol or the like. It is mixed with the organic solvent 33 of No. 33 and liquefied. The above-mentioned photocatalyst composition 3 is formed as particles, and is a titanium oxide, titanium dioxide, or sol-gel type titanium compound, or zinc oxide, tin oxide, iron oxide, copper oxide, silver oxide, tungsten oxide, zirconium oxide, Metal oxide compounds such as bismuth oxide, indium oxide, cadmium oxide, germanium oxide, nickel oxide, cobalt oxide, chromium oxide, manganese oxide, vanadium oxide, niobium oxide, antimony oxide, and strontium titanate can be mentioned, but titanium dioxide is preferable. , Anatase-type titanium dioxide crystals, rutile-type titanium dioxide crystals or mixtures thereof, or sol-gel-type titanium compounds are preferable. The particle size of the photocatalyst composition 31 is not particularly limited, but may be 6 nanometers to 10 nanometers so that it can be easily dissolved in the organic solvent 33. If the particle size is less than 6 nanometers, processing is difficult and costs increase. If the particle size is 10 nanometers or more, it is difficult to dissolve in the organic solvent 33 and the surface of the substrate 1 after coating is applied. This is because the solvent becomes cloudy and the transparency is greatly reduced. The dispersant 32 described above disperses particles such as the photocatalyst composition 31, and includes amino acids such as theanine, lysine, glutamic acid, aspartic acid, arginine, and proline, sucrose stefanic acid ester, and sucrose stearic acid ester. Sucrose fatty acid esters such as sucrose palmitate and polyphenols such as catechins are used, but natural products may also be used. For example, tea leaves containing polyphenols catechin and the amino acid theanine are extracted with hot water. You may use the extract obtained from the above. Further, although not shown, the surface coating agent 3 may be mixed with a metal or a metal compound such as gold, silver, copper, platinum, iron, cobalt, nickel, chromium and zinc. This is because the mixing of this metal or metal compound promotes charge separation by the photocatalyst composition 31, and further enhances the decomposition characteristics of the organic substance by the photocatalyst. Further, although not shown, cerium oxide may be mixed with the surface coating agent 3. Cerium oxide decomposes and removes organic substances such as dirt by heat, and effectively utilizes the heat of reaction (heat generated) generated by the decomposition and removal action of the photocatalyst composition 31 to remove the organic substances. This is to enhance the effect. Next, a method for forming the photocatalyst layer 30 will be described. First, as shown in FIG. 8A, the above-mentioned photocatalyst base material 2 is applied onto the base 1 using a known technique such as a spatula coating method to form the photocatalyst base layer 20. The thickness of the photocatalyst base layer 20 may be such that the photocatalyst composition 31 or a metal or a metal compound can be fixed thereto, and is formed so as to have a thickness of, for example, about 10 nanometers after drying. After the application of the photocatalyst base material 2, the organic solvent 22 gradually evaporates, and the photocatalyst base material 2 is dried as much as possible in a dry state, and a known technique such as a spatula coating method is used on the photocatalyst base layer 20. The above-mentioned surface coating agent 3 is applied (see Fig. 8 (b)). Then, the photocatalyst composition 31 can be fixed on the photocatalyst base layer 20 by evaporating and drying the remaining organic solvent 22 and the organic solvent 33 in the coated surface coating agent 3. The above-mentioned drying may be either natural drying, which is left at room temperature to dry, or forced drying, which is dried by applying warm air or the like. By the way, the reason why the surface coating agent 3 is applied in a state where the photocatalyst base material 2 is dry is to fix the photocatalyst composition 31 to the upper part of the photocatalyst base layer 20 by the binder agent 21, and the organic solvent in the photocatalyst base material 2 is applied. After the organic solvent 33 in 22 and the surface coating agent 3 evaporates and dries, the photocatalyst composition 31 can be exposed to the outermost surface as shown in FIG. 8 (c). Further, the reason why the modified epoxy resin is used as the binder agent 21 of the photocatalyst base material 2 is that particles such as the photocatalyst composition 31 can be firmly fixed even if the surface irregularities of the substrate 1 are relatively small, and the binder agent 21 is used. Silicon oxide (SiO)<sub>2</sub>) Is used in order to prevent particles such as the photocatalyst composition 31 from settling and being buried in the photocatalyst base layer 20 before the organic solvent 22 finishes drying. The type of photocatalyst base material 2 to be used may be appropriately selected according to the surface condition of the substrate 1 and the like. Further, the dispersant 32 is mixed with the surface coating agent 3 in order to prevent particles such as the photocatalyst composition 31 from aggregating with each other, and since the particles do not settle before coating, the particles are stirred immediately before coating. After coating, it is possible to prevent localization due to agglomeration of particles and evenly adhere to the photocatalyst base layer 20 to form the photocatalyst layer 30. Therefore, since the surface coating agent 3 does not contain the binder agent 21 for fixing the photocatalyst composition 31 as in the conventional case, once the organic solvent 33 has dried, it is not necessary to wipe off after applying the surface coating agent 3. The photocatalyst composition 31 can be exposed on the outermost surface, and by mixing the dispersant, it can be evenly adhered on the photocatalyst base layer 20. Even if the substrate is open, the photocatalyst composition 31 can be exposed on the outermost surface of the substrate to provide the photocatalyst layer 30. Therefore, when organic substances such as dirt adhere to the surface, they come into contact with the photocatalyst composition 31, and if light such as ultraviolet rays is irradiated in this state, the organic substances such as dirt are decomposed and removed by the excitation of the photocatalyst composition 31. Will be done. The method for forming the photocatalyst layer here is not necessarily related to the platinum-supported photocatalyst, but it can be naturally applied to the case where the platinum-supported photocatalyst is actually used. Further, an embodiment of the photocatalyst of the present invention will be described with reference to FIGS. 9 to 10. In Fig. 9 (A), A'is a photocatalyst, which is applied on a substrate 1 such as a window glass of a building or an automobile, a plastic plate or a solar part, or a wall surface in a room, and is irradiated with light such as ultraviolet rays. By the photocatalytic action of the photocatalytic composition 11a contained inside, dirt and harmful organic substances adhering to the substrate 1a are decomposed and removed. The photocatalyst A'is prepared to be liquid by mixing the photocatalyst composition 11a, the dispersant 12a, the binder 14a, and the binder auxiliary agent 15a containing an oil component in a predetermined ratio with an organic solvent 13a such as ethanol. Has been done. The above-mentioned photocatalyst composition 11a is a particulate substance, and is a titanium oxide, titanium dioxide, or solgel type titanium compound, or zinc oxide, tin oxide, silver oxide, tungsten oxide, zirconium oxide, bismuth oxide, indium oxide, and oxidation. Metal oxides such as cadmium, germanium oxide, nickel oxide, cobalt oxide, chromium oxide, manganese oxide, vanadium oxide, niobium oxide, antimony oxide, and strontium titanate can be mentioned, but titanium dioxide is preferable, and anatase-type titanium dioxide crystals, A rutyl-type titanium dioxide crystal or a mixture thereof, or a solgel-type titanium compound is preferable. The particle size of the photocatalyst composition 11a is not particularly limited, but may be 6 nanometers to 10 nanometers so that it can be easily dissolved in the organic solvent 13a. If the particle size is less than 6 nanometers, it is difficult to process and the cost is increased. If the particle size exceeds 10 nanometers, it is difficult to dissolve in the organic solvent 13a and the substrate after coating is applied. This is because the surface of 1a becomes cloudy and the transparency is greatly reduced. The blending ratio of the photocatalyst composition 11a is preferably 0.1% by mass to 20% by mass with respect to the total amount of the photocatalyst A'. If it is less than 0.1% by mass, organic substances such as dirt will not be decomposed and sufficient photocatalytic action cannot be exhibited. If it exceeds 20% by mass, the transparency of the surface of the substrate 1a cannot be obtained. It causes inconvenience. The above-mentioned dispersant 12a disperses particles of the photocatalyst composition 11a and the like, for example, amino acids such as theanine, lysine, glutamate, aspartic acid, arginine and proline, sucrose stefanic acid ester, sucrose stearate ester, Sucrose fatty acid esters such as sucrose partimate and polyphenols such as catechins are used, but natural products may also be used. For example, tea leaves containing polyphenols catechin and the amino acid theanine are extracted with hot water. You may use the extract obtained from the above. The blending ratio of the dispersant 12a is preferably 0.01% by mass to 1% by mass with respect to the total amount of the photocatalyst A'. This is because if it is less than 0.01% by mass, the effect of dispersion cannot be obtained, and if it exceeds 1% by mass, the fluidity decreases and coating becomes difficult. The binder agent 14a described above fixes the photocatalyst composition 11a on the substrate 1a, and is, for example, an appropriate composition such as a silicone resin, an acrylic resin, a fluororesin, or an epoxy resin, or a natural glue. Etc. are used and mixed with the photocatalyst so as to have a predetermined concentration. The blending ratio of the binder agent 14a is preferably 0.1% by mass to 20% by mass with respect to the total amount of the photocatalyst A'. If it is less than 0.1% by mass, the particles of the photocatalyst composition 11a cannot be sufficiently adhered to the substrate, and if it exceeds 20% by mass, the fluidity of the solution is lowered and it becomes difficult to apply. The binder auxiliary agent 15a described above is for applying the photocatalyst composition 11a to the surface of the substrate 1a (the object to be coated) as thinly as possible. The binder auxiliary agent 15 has an oil component, and the oil component is, for example, a wax derived from a natural plant, a mineral spirit solvent, a vegetable oil, or the like, and a conventional surfactant, water, ethanol, or the like. It is a liquid. Among the oil components, natural plant-derived waxes include, for example, camellia oil, carnauba wax, candelilla wax, rice bran wax, auricula wax, sugar cane wax, jojoba wax, oil seed wax, mokuro, urshiro, and beeswax, and at least. You can choose one from this group. These oil components exhibit water repellency, gloss on the coated surface, and are preferably 20% by mass to 70% by mass with respect to the total amount. This is because if it is less than 20% by mass, rice grain-sized lumps containing particles such as the photocatalyst composition 11a are formed, and if it exceeds 70% by mass, the entire photocatalyst A'is solidified, causing an inconvenience that it cannot be applied. By the way, although not shown, the photocatalyst A'may be mixed with a metal or a metal compound such as gold, silver, copper, platinum, iron, cobalt, nickel, chromium and zinc. This is because by mixing this metal or metal compound, charge separation by the photocatalyst composition 11a is promoted, and the decomposition characteristics of organic substances and the like by the photocatalyst are further enhanced. Further, although not shown, cerium oxide may be mixed with the photocatalyst A'. Cerium oxide decomposes and removes organic substances such as dirt by heat, and decomposes and removes by effectively utilizing the reaction heat (heat generation) associated with this decomposition of organic substances generated by the decomposition and removal action of the photocatalyst composition 11a. This is to enhance the effect of. Further, as shown in FIG. 10A, the abrasive 16a may be mixed with the above-mentioned photocatalyst A'. This abrasive 16a is surplus when the photocatalyst body A'is coated on the substrate 1a and then wiped with the wiping means 2a so that the photocatalyst composition 11a can be exposed from the outermost surface as shown in FIG. 10 (b). It plays the role of scraping off the binder agent 14a and the like. This abrasive 16a is formed into particles having a particle size of 30 nanometers to 500 nanometers by a material such as silica or ceramic, and is adjusted by mixing with the photocatalyst A'. If the particle size of the particles of the abrasive 16a is less than 30 nanometers, the photocatalyst composition 11a and the binder 14a are both wiped off and removed when the coating layer 3a is wiped, which exceeds 500 nanometers. This is because the photocatalyst A'remains thick even after wiping, which causes a disadvantage that the proportion of the photocatalyst composition 11a exposed on the outermost surface is reduced. The blending ratio of the abrasive 16a is preferably 0.1% by mass to 50% of the total amount of the photocatalyst A'. If it is less than 0.1% by mass, the oil component remains and cannot be sufficiently wiped off, and if it exceeds 50% by mass, the amount of the photocatalyst composition 11a and the binder agent 14a remaining on the substrate 1a after being wiped off is reduced. Is to occur. Next, a method for forming the photocatalyst A'on the substrate 1a will be described. To the substrate 1a to be coated with the photocatalyst A'in advance, stains on the surface (coated surface) of the substrate 1a, particularly oil adhering to the surface, are removed from the stain remover (for example, its component is ethyl). (Liquid cleaning agent containing alcohol, surfactant, tocophenol, ion-exchanged water, L-ascorbic acid, citric acid, etc.) is sprayed and thoroughly removed with a waste cloth or the like. As shown in FIGS. 9 (a) and 10 (b), the prepared photocatalyst A is evenly applied to the entire surface of the substrate 1a or by a known technique such as spatula coating, and the prepared photocatalyst A is applied to the substrate 1a. A coating layer 3a is formed on the surface. Next, in a state where the coating layer 3a is not dried (a state in which a moist state still remains), the ninth coating layer 3a of the photocatalyst A'coated on the surface of the substrate 1a is subjected to the ninth. As shown in FIGS. (B) and 10 (b), when wiping is performed by the wiping means 2a, for example, with a cloth cloth such as bulky fiber, the surface layer portion of the coating layer 3a in the photocatalyst A'is laminated. The particles of the photocatalyst composition 11a, the binder agent 14a, and the binder auxiliary agent 15a are removed, the photocatalyst layer 4a is formed, and the photocatalyst composition 11a is exposed on the outermost surface. By the way, in the present invention, the dispersant 12a is mixed with the photocatalyst A'to disperse the particles such as the photocatalyst composition 11a in the coating layer 3a and evenly coat the particles such as the photocatalyst composition 11a on the substrate 1a. This is for spreading, and even after wiping with the wiping means 2a, particles such as the photocatalyst composition 11a in the photocatalyst layer 4a are evenly provided on the base 1a without agglomeration, so that the entire surface of the base 1a on which the photocatalyst layer 4a is formed is formed. It is possible to exert the effect of decomposing and removing organic substances such as dirt.
Hereinafter, an embodiment of the present invention will be described. First, the photocatalyst A'prepared with the materials and blending ratios described in (Example) is used to apply the photocatalyst A'on a glass plate (base 1a) whose surface has been cleaned in advance, and then bulky fibers. The photocatalyst layer 4a was formed by wiping with a cloth cloth of. For comparison, a photocatalyst body containing no dispersant 12a in (Example) was prepared as (Comparative Example), and a photocatalyst layer 4a was formed in the same manner. (Example) A compounding example of the photocatalyst A'of the present invention -Photocatalyst composition 11a ......... Titanium oxide (TiO<sub>2</sub>), 5% by mass Binder agent 14a ......... Silicone resin, 5% by mass Binder auxiliary agent 15a ...... camellia oil solution, 50% by mass Dispersant 12a ......... Theanine, 0.1% by mass Organic solvent 13a ......... Ethanol, residue (Comparison example) -Photocatalyst composition 11a ......... Titanium oxide (TiO<sub>2</sub>), 5% by mass Binder agent 14a ......... Silicone resin, 5% by mass Binder auxiliary agent 15a ...... camellia oil solution, 50% by mass Organic solvent 13a ......... Ethanol, residue Next, in (Example) and (Comparative Example), the adhered state of the photocatalyst composition 11a on the glass plate (base 1a) after wiping was examined. In (Comparative Example), the particles of the photocatalyst composition 11a were found. While secondary particles laminated in dozens to thousands of layers were localized on the glass plate, no secondary particles were observed in (Example), and individual photocatalyst compositions were formed. The particles of 11a were dispersed and fixed evenly over the entire surface of the glass plate. The action and effect of the photocatalyst A'of the present invention is not limited to the material and blending ratio of this (Example), and the same applies to other materials and blending ratios detailed above. The action effect was obtained. The photocatalyst A'here is not necessarily related to the platinum-supported photocatalyst, but also functions meaningfully in the case of the platinum-supported photocatalyst.
FIG. 1 is a graph showing the results of measuring changes in formaldehyde concentration and changes in temperature and humidity every 30 minutes for 24 hours or more in a laboratory (nighttime Western-style room) for measuring the effect of the present invention, and FIG. 2 is a graph showing the results. , A schematic perspective view showing the configuration of the photocatalytic article of the present invention, FIG. 3 is a schematic cross-sectional view taken along line 2-2 of FIG. 2, and FIG. 4 is a schematic sectional view of FIG. 2 3-3. FIG. 5 is a schematic cross-sectional view taken along line, FIG. 5 is a schematic cross-sectional view taken along line 4-4 of FIG. 2, and FIG. 6 shows the use of a sealed packaging bag containing the cleaning member of FIG. FIG. 7 is a schematic perspective view showing a state, FIG. 7 is an explanatory view for explaining the inside of FIG. 6, and FIG. 8 shows a method for forming a photocatalyst layer of the present invention. a) is a cross-sectional view showing the main part after applying the photocatalyst base material, (b) is a cross-sectional view showing the main part after applying the surface coating agent, and (c) is a cross-sectional view showing the main part after drying. , 9 is an enlarged cross-sectional view showing a part of the state in which the photocatalyst according to the embodiment of the present invention is applied onto the substrate, in which (a) is immediately after application and (b) is by wiping means. FIG. 10 is a cross-sectional view showing a part of a state in which the photocatalyst of another embodiment of the present invention is applied onto the substrate in a wiped state, and FIG. b) is the state of being wiped by the wiping means. In these drawings, A is a photocatalyst article, 4 is a cleaning member, 5 is a photocatalyst surface coating member, 6 is a wiping member, 1 is a substrate, and 2 is. Is a photocatalyst base material, 20 is a photocatalyst base layer, 21 is a binder agent, 3 is a surface coating agent, 30 is a photocatalyst layer, and 31 is a photocatalyst composition. , 32 are dispersants, A'is a photocatalyst, 1a is a substrate, 3a is a coating layer, 4a is a photocatalyst layer, 11a is a photocatalyst composition. 12a is a dispersant, 14a is a binder agent, 15a is a binder auxiliary agent, and 16a is an abrasive.
10 sheets
Sheet 1 Sheet 2 Sheet 3 Sheet 4 Sheet 5 Sheet 6 Sheet 7 Sheet 8 Sheet 9 Sheet 10
Every citation, both ways
| Document | Relation | Office | Cited during |
|---|---|---|---|
| JP2000342978A | Cites | Japan | Examiner |
| JP2001162176A | Cites | Japan | Examiner |
| JP2001239161A | Cites | Japan | Examiner |
| JP2004000853A | Cites | Japan | Examiner |
| JP2004073910A | Cites | Japan | Examiner |
| JP2004197064A | Cites | Japan | Examiner |
| JP2004230263A | Cites | Japan | Examiner |
| JP2004250598A | Cites | Japan | Examiner |
| JP2005014350A | Cites | Japan | Examiner |
| JPH08131842A | Cites | Japan | Examiner |
| JPH11300273A | Cites | Japan | Examiner |
| JP2001239161A | Cites | Japan | – |
| JP2004073910A | Cites | Japan | – |
| JP11300273A | Cites | Japan | – |
| JP2004230263A | Cites | Japan | – |
| JP08131842A | Cites | Japan | – |
| JP2001162176A | Cites | Japan | – |
| JP2005014350A | Cites | Japan | – |
| JP2004197064A | Cites | Japan | – |
| JP2004000853A | Cites | Japan | – |
| JP2000342978A | Cites | Japan | – |
| JP2004250598A | Cites | Japan | – |
15 members in 6 offices
Members15
| Document | Office | Kind | |
|---|---|---|---|
| WO2006112281A2 | World Intellectual Property Organization (WIPO) | A2 | |
| WO2006112281A3 | World Intellectual Property Organization (WIPO) | A3 | |
| WO2006112281B1 | World Intellectual Property Organization (WIPO) | B1 | |
| KR20070118650A | Republic of Korea | A | |
| EP1867382A2 | European Patent Office (EPO) | A2 | |
| EP1867382A9 | European Patent Office (EPO) | A9 | |
| CN101213011A | China | A | |
| JPWO2006112281A1 | Japan | A1 | |
| US2009136405A1 | United States of America | A1 | |
| KR20090104911A | Republic of Korea | A | |
| KR20090105975A | Republic of Korea | A | |
| KR20090107558A | Republic of Korea | A | |
| EP1867382A4 | European Patent Office (EPO) | A4 | |
| CN101213011B | China | B | |
| JP4858857B2This record | Japan | B2 |
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Numbers
- Publication
- 4858857
- Application
- 2007521186
Titles2
- Japanese
- 白金を主触媒として空気中の有機化合物を分解し除去させる方法および光触媒物品および光触媒層の形成方法並びに光触媒体
- English
- A method for decomposing and removing organic compounds in the air using platinum as a main catalyst, a method for forming a photocatalyst article and a photocatalyst layer, and a photocatalyst
Classification
- CPC, 13
- A61L9/205
- B01D53/02
- B01D53/8668
- B01D2255/1021
- B01D2255/20707
- B01D2255/802
- B01D2257/90
- B01D2259/4508
- B01J21/063
- B01J23/42
- B01J37/0219
- B01J35/39
- B01D53/86
- IPC, 16
- B01D53 86
- A47L13 16
- B01D53 94
- B01J23 42
- B01J23 63
- B01J35 00
- B01J37 02
- B08B17 02
- C03C17 23
- C09D1 00
- C09D5 16
- C09D163 00
- C09D201 00
- E06B3 30
- E06B5 00
- B01J35 02
