| 摘要 |
PROBLEM TO BE SOLVED: To produce a photocatalyst having visible light activity, and to provide a method for producing the same, a photo-decomposition method with light containing visible rays using the photocatalyst and a device using the photocatalyst. SOLUTION: The photocatalyst is an oxide semiconductor such as anatase- type titanium dioxide, which has stable oxygen defects and is active under visible light irradiation. The method for producing the visible light-type photocatalyst comprises subjecting the oxide semiconductor to hydrogen plasma treatment or plasma treatment in plasma of rare gas elements under such a condition that the intrusion of the atmosphere into the treatment system is substantially avoided. A material obtained by loading the catalyst onto a base material is also provided. A decomposition method of a substance, comprising bringing the substance to be decomposed into contact with the catalyst irradiated with the light containing at least visible light, is provided. The new catalyst, capable of utilizing even visible light, and a method comprising using this photocatalyst and photo-decomposing/removing various substances containing organic substances or bacteria are provided. |
