PHOTOCATALYTIC FILM, ITS MANUFACTURING METHOD, ARTICLE, AND HYDROPHILIZATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a new photocatalytic film which exhibits photo-excited superhydrophilicity under sunlight irradiation, but suppresses the decomposition activity of an organic matter.

SOLUTION: In the photocatalytic film, at least one of main surfaces contains photosemiconductor particles, and is hydrophilized by light irradiation. When the main surface is irradiated with light having a half-value width of 15 nm or less after retention in the dark, a hydrophilization rate is less than 2 (1/deg/min/105) in a region of wavelength of irradiation light of 370 nm or more, and is 2 (1/deg/min/105) or more in at least a part of a region where the irradiated light has a wavelength of 300-360 nm.

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