Photo-catalyst is a general name on semiconductor materials with the properity of light catalysing, which is made of multi-metal oxides with a special crystal structure. Under the irradiation of ultraviolet radiation, because of the function of strong light-oxidation reduction made by dissociative electron on crystal objects’ surface and foveola, photo-catalyst can oxidate and degrade various organic compounds and some inorganic compound, and moreover, it also can kill the bacteria, destroying the cell membrane and solidifying the virus’ protein to make the virous cannot live.

Japan advances in photo-catalyst technology. In recent years, in the promotion of scientists, photo-catalyst technic has been widely used in anti-pollution, anti-bacteria, deodorization, air-cleaning, purifying the water and fathering the environment pollution, etc. And photo-catalyst technic‘s application in some industries have fulfilled industrialization in Japan, eg, glass, chinaware, metal construction product, domicile facility, air-cleaner, air-conditioner, buliding,  antifouling doping in autocar, and various purifying–environment equipments. According to forecast of related departments in Japan, photo-catalyst technic’s application is hopeful to form the market with a value of $100 billion in Japan.

With the irradiation of sunshine, photo-catalyst can produce free eletron and cavitied semiconductor, which can catalyse and degrade organic compounds and some inorganic compounds adsorbing on the chianware, glass and the surface of metal. Besides, it can kill bacteria, virus and other microbe. Thereby, photo-catalyst can be widely used in sanitation cleaning-tools, ceramic tile, domicile equipments and dishware for anti-bacteria and antipollution. Spreading the photo-catalyst on the chainware and some inorganic material surface, pocessed by the special technics, it can form the permanence membrane with property of anti-bacteria and antipollution in order to keep clean, beauty for a long time and reduce clearing. Especially the application of photo-catalyst technic in sanitation cleaning-tools, dishware and other aspects, it is significance to prevent the spreading of disease for advancing the people’s health. Through anti-bacteria testing paper proves that the rate on killing bacteria on chinaware’s surface sprayed photo-catalyst can reach 100%, and so does the glass.