PHOTOCATALYST MATERIAL, PHOTOCATALYST COMPOSITION USING THE SAME AND PHOTOCATALYST PRODUCT

摘要

An object of the invention is to provide a photocatalyst material having a higher catalyst effect than conventional photocatalyst materials. The photocatalyst material of the invention contains, as its major component, a tungsten oxide powder excited by a light source which emits light having a wavelength of 430 to 500 nm, the photocatalyst material having a decomposition ability of 50% or more wherein the decomposition ability is given by the following equation based on the following test: [Test for Decomposition Ability] 1 g of a tungsten oxide powder and 20 ppm of acetaldehyde (amount A) are poured into a 3-liter glass container, and acetaldehyde (amount B) is measured after light having a peak wavelength of 460 nm±10 nm is irradiated to the mixture for 2 hours to measure the decomposition ability (%): <?in-line-formulae description="In-line Formulae" end="lead"?>Decomposition ability(%)=[(acetaldehyde amount A-acetaldehyde amount B)/acetaldehyde amount A]x100.<?in-line-formulae description="In-line Formulae" end="tail"?>