| abstract |
(57) [Problem] To provide a photocatalyst capable of obtaining high photocatalytic activity by visible light. A photocatalyst body (10) comprises: a substrate (1); Ti, O, and C; As the main component, and the TiO 2 fine particles have a mass ratio of 3 in terms of oxide. A photocatalyst film 2 which is mixed so as to be within a range of 0 to 90% by mass, and in which metal cluster fine particles are dispersed and formed into a film on a substrate, and which has a visible light absorption peak due to plasma resonance of the metal cluster fine particles; Is provided. According to the photocatalyst body 10, absorption of visible light is generated by plasma resonance of the metal cluster fine particles, and high photocatalytic activity can be obtained by effectively utilizing the absorbed visible light energy. |