| 摘要 |
[PROBLEMS] To provide a photocatalyst capable of exerting satisfactory photocatalytic performance, which even when added to a resin or paint, would not cause any color change or deterioration of resin, etc. [MEANS FOR SOLVING PROBLEMS] There is provided a titania photocatalyst comprising titanium containing 0.1 to 25 mol% of niobium. The titania photocatalyst has a pore volume of 0.05 to 10 cm<3>/g and a crystallite diameter of 5 to 1000 nm. The titania photocatalyst contains a brookite crystal phase. There is further provided a titania photocatalyst comprising titanium atoms containing 0.01 to 20 mol% of a trivalent atom, the trivalent atom being at least one of aluminum, cerium and iron. Still further, there is provided a product comprising the above titania photocatalyst.
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