Photocatalytic activity and photoinduced hydrophilicity of titanium dioxide coated glass

Abstract Antifogging mirror or self-cleaning glasscan be realized utilizing photoinduced hydrophilicityof titanium dioxide. Application fields of functional titanium dioxidecoating is now expanding rapidly not only in applications for glass but also in applications for polymer, metal and ceramic materials. The high hydrophilicsurface of TiO 2 is interesting also on the standpoint of the basic photon related surface scienceof titanium dioxide. In order to understand the photoinduced hydrophilicconversion on titanium dioxidecoating in details, it is inevitably necessary to understand the relationship between the photo reaction and the surface crystal structure. In this paper, photoinduced hydrophilicconversion was evaluated on the different crystal faces of rutile single crystal and also polycrystalline anatase titanium dioxideto clarify the dependence of the crystal structure on the photoinduced hydrophilicconversion.