Preparation method of visible light nanometer titania photocatalyst sol

A visible-light photocatalyst nano titanium dioxide sol method

TECHNICAL FIELD

[0001] The present invention pertains to a method for preparing visible nanometer titanium dioxide photocatalyst sol.

Background technique

[0002] The titanium dioxide because it is chemically stable, insoluble, non-toxic, low cost, is considered ideal photocatalyst. Thus titanium dioxide film as the world's most effective environmental cleanup materials, chemical and biological methods are unable to remove the organic matter is decomposed into carbon dioxide and water, which has photocatalytic properties and good selectivity and high yield, less pollution, applicable a wide range of hydrophilic self-cleaning effect, etc., so get widespread attention.

[0003] The current conventional titanium dioxide thin films prepared by sol-gel method for (Sol-Gel) method, which is simple to operate, easy to control stoichiometry, but the raw material of the process to use more organic alcohol salts, organic solvents and network agent, so the cost is relatively high, leading to expensive film, the impact of its sales market, in addition to the method in the production process, the heat treatment stage will produce organic compounds, flammable volatile organic compounds which easily cause environmental pollution.

SUMMARY OF THE INVENTION

[0004] The technical problem to be solved by the present invention is to provide a method for preparing visible nanometer titanium dioxide photocatalyst sol.

[0005] The present invention solves the above technical problem adopted technical scheme is as follows:

A visible-light nanometer titanium dioxide photocatalyst sol preparation method, the method comprising the steps of:

Step one: the titanyl sulfate, noble metal salt and sulfuric acid were added and stirred purified water, and stirred during the addition of phosphate; Step two: adding a precipitating agent in the resulting solution in one step, so that a white powder precipitated and the white precipitate was filtered powder and wash;

Step 3: Step two resulting white powder was added to purified water while adding hydrochloric acid and phosphoric acid, followed by stirring at high speed;

Step Four: The Step Three centrifuge separation resulting solution, thereby to nano-titanium dioxide particles and the titanium dioxide particles are washed;

Step Five: After the nano titanium dioxide particles added to purified water and continue stirring, adding some dispersing agent and stabilizer, namely to give the corresponding titanium dioxide photocatalyst sol.

[0006] Preferably, the step of visible light photocatalyst nano-titanium dioxide sol when preparing a stirring, maintaining the temperature of the solution between OV -80 0C.

Stirring time step [0007] Further, preferably, said visible light photocatalyst titanium dioxide sol preparation process should be carried out in a 4 hours.

[0008] Further, preferably, the visible light photocatalyst nano-titanium dioxide sol preparation step two is added precipitant is ammonia and sodium hydroxide.

Step [0009] Further, preferably, the visible light photocatalyst nano-titanium dioxide sol in the preparation of three high-speed agitation, maintaining the solution temperature at 50 ° C or more.

Step [0010] Further, the preferred method of the visible light nano titanium dioxide photocatalyst sol conducted in three high-speed agitation should be kept for more than two hours.

[0011] Further, preferably, the visible light photocatalyst nano-titanium dioxide sol preparation step process should be repeated four times.

[0012] The present invention taken after the above scheme, the present invention utilizes the sol - gel method Nano Ti02, and by adding precious metal salts, higher photocatalytic activity, in addition to the product in a very good light under ultraviolet light catalytic ability, visible light but also have good photocatalytic ability.

[0013] Other features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or be learned by practice of the invention. The objectives and other advantages of the present invention may be realized and obtained by means of the written description of the book, the claims structure particularly pointed out.

detailed description

[0014] The following examples are described in detail embodiments of the present invention, whereby the present invention is how to apply technology to solve technical problems and to reach a technical effect of the implementation process to fully understand and implement accordingly. It should be noted, it does not constitute a conflict of the present invention, various embodiments and various embodiments of the various features can be combined with each other, technical solutions are formed within the scope of the present invention.

[0015] - The method of producing visible light photocatalyst titanium dioxide sol, characterized in that it comprises the following steps: Step 1: The titanyl sulfate, precious metal salts and sulfuric acid were added and stirred purified water, stirred during the addition of phosphate; Step 2: a generating step of precipitating agent was added, so that a white powder precipitated and the white powder was filtered and washed precipitate;

Step 3: Step two resulting white powder was added to purified water while adding hydrochloric acid and phosphoric acid, followed by stirring at high speed;

Step Four: The Step Three centrifuge separation resulting solution, thereby to nano-titanium dioxide particles and the titanium dioxide particles are washed;

Step Five: After the nano titanium dioxide particles added to purified water and continue stirring, adding some dispersing agent and stabilizer, namely to give the corresponding titanium dioxide photocatalyst sol.

[0016] Preferably, the step of visible light photocatalyst nano-titanium dioxide sol when preparing a stirring, maintaining the temperature of the solution between OV -80 0C.

Stirring time step [0017] Further, preferably, said visible light photocatalyst titanium dioxide sol preparation process should be carried out in a 4 hours.

[0018] Further, preferably, the visible light photocatalyst nano-titanium dioxide sol preparation step two is added precipitant is ammonia and sodium hydroxide.

Step [0019] Further, preferably, the visible light photocatalyst nano-titanium dioxide sol in the preparation of three high-speed agitation, maintaining the solution temperature at 50 ° C or more.

Step [0020] Further, the preferred method of the visible light nano titanium dioxide photocatalyst sol conducted in three high-speed agitation should be kept for more than two hours.

[0021] Further, preferably, the visible light photocatalyst nano-titanium dioxide sol preparation step process should be repeated four times.

[0022] The present invention taken after the above scheme, the present invention utilizes the sol - gel method Nano Ti02, and by adding precious metal salts, higher photocatalytic activity, in addition to the product in a very good light under ultraviolet light catalytic ability, visible light but also have good photocatalytic ability.

[0023] Finally, it should be noted that: The above description is only a preferred embodiment of the present invention but not to limit the present invention, although reference to the embodiments of the present invention has been described in detail, for the skilled artisan technical solutions, it is still possible to the preceding embodiments described modify, or for some technical features equivalent replacements. Any modification within the spirit and principles of the present invention, made, equivalent replacement, or improvement should be included within the scope of the present invention.