Patent ID: 6730630
Filing Date: 2004-05-04
Classification: B01J,B82Y,C01G,C01P,Y10T

Abstract:
A photocatalyst comprising a titanium oxide and a metal-containing compound other than titanium oxide on the surface of the titanium oxide, wherein the metal-containing compound is a metal oxide having an acid site and the photocatalyst has a BET specific surface area of about 55 m2/g or larger, or wherein the metal-containing compound is a basic metal-containing compound and the photocatalyst has an anatase-crystalline structure and an anatase-crystalline size of about 10 nm or larger; andwherein the photocatalyst has index X of about 0.2 or more, index X being calculated by equation (I): X=B/Aâ€ƒâ€ƒ(I) wherein A represents an integrated value of absorbance within a wavelength range of from 220 nm to 800 nm along an ultraviolet-visible diffuse reflection spectrum of the photocatalyst, and B represents an integrated value of absorbance within a wavelength range of from 400 nm to 800 nm along the ultraviolet-visible diffuse reflection spectrum.