Silica titania composite airgel particles, method for producing silica titania composite airgel particles, 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 and has excellent dispersibility.SOLUTION: A silica-titania composite aerogel particle includes: a base particle with an element ratio of silicon Si and titanium Ti, Si/Ti, of 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. 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. An element ratio of carbon C and titanium Ti, C/Ti, on the surface of the silica-titania composite aerogel particle, is 2 or more and 5 or less.SELECTED DRAWING: None