SILICA-TITANIA COMPOSITE AEROGEL PARTICLE, METHOD FOR PRODUCING SILICA-TITANIA COMPOSITE AEROGEL PARTICLE, PHOTOCATALYST-FORMING COMPOSITION, PHOTOCATALYST AND STRUCTURE

摘要

To provide a silica-titania composite aerogel particle that exhibits a high photocatalytic function in the visible range.SOLUTION: A silica-titania composite aerogel particle includes: a base particle including silicon and titanium whose element ratio Si/Ti is more than 0 and 6 or less; and a surface layer present on the base particle and including a metal compound having a metal atom and a hydrocarbon group. In a C 1s XPS spectrum, a value of [(peak intensity of C-O bond+peak intensity of C=O bond)/(peak intensity of C-C bond+peak intensity of C=C bond)] is in the range of 0.03 to 0.3. The silica-titania composite aerogel particle has a BET specific surface area in the range of 200 m/g to 1,200 m/g, and has absorption at wavelengths of 450 nm and 750 nm in a visible absorption spectrum.SELECTED DRAWING: Figure 1