Process for the production of photocatalytic coatings on substrates

A process for the production of a self-cleaning photocatalytically active coated substrate, which comprises depositing a detergent oxide coating on the substrate surface by contacting it with a fluid mixture containing a titanium source and an oxygen source, the substrate being at a temperature of at least 600 ° C. The coated surface has good resistance, a high photocatalytic activity and a low reflection of visible light. Preferably, the deposition temperature is generally in the range of 645 ° C to 720 ° C, which provides especially good resistance. The fluid mixture preferably contains titanium chloride and an ester, especially ethyl acetate. It also describes a self-cleaning coated substrate, especially a glass substrate, which has high photocatalytic activity and low reflection of visible light and a resistant self-cleaning coated glass.