PHOTOCATALYTIC COMPOSITION WHICH CAN BE EXCITED BY VISIBLE LIGHT AND PHOTOCATALYTIC THIN FILM, AND THEIR MANUFACTURING METHODS

摘要

PROBLEM TO BE SOLVED: To provide a photocatalytic composition excited by visible light, capable of exhibiting a photocatalytic activity by the irradiation with the visible light and being manufactured under a mild condition, a photocatalytic thin film, and their manufacturing methods. SOLUTION: This photocatalytic composition is prepared by compounding a photocatalyst comprising anatase- or brookite-type titanium oxide and a tungsten alkoxide dissolved in a protolytic solvent, and can respond to the light in a visible light low wavelength region from 380 to 450 nm. This photocatalytic thin film is made by using this photocatalytic composition.