PROCESS FOR PRODUCING DISPERSION OF COPPER ION-MODIFIED TUNGSTEN OXIDE PHOTOCATALYST

摘要

The present invention relates to a process for producing a dispersion of a copper ion -modified tungsten oxide photocatalyst, including the steps of subjecting copper ion -modified tungsten oxide particles to mechanical pulverization treatment in a solvent and then contacting the resulting dispersion of the pulverized particles with an oxygen gas or ozone; and a copper ion-modified tungsten oxide photocatalyst which is produced by subjecting copper ion-modified tungsten oxide particles to mechanical pulverization treatment in a solvent and then contacting the resulting dispersion of the pulverized particles with an oxidative gas, wherein a photocatalyst powder obtained by drying the dispersion after being contacted with the oxidative gas exhibits a diffuse reflectance of 75% or more as measured at a wavelength of 700 nm.