PHOTOCATALYST FUNCTIONAL FILM AND METHOD FOR MANUFACTURING SAME

摘要

Provided is a photocatalyst functional film comprising: a laminated structure of a substrate layer, a barrier layer and a photocatalyst layer, wherein the barrier layer is a SiO2 film and the photocatalyst layer is an amorphous TiO2 film; and visible light active photocatalyst particles formed on the surface of the amorphous TiO2 film. In addition, provided is a method for manufacturing a photocatalyst functional film comprising the steps of: obtaining an SiO2 sol by means of dehydrating and dealcoholizing reactions by adding an alcohol solvent and an acid to a silicate precursor; forming a barrier layer by applying and drying the SiO2 sol on a substrate; obtaining a TiO2 amorphous sol by means of dehydrating and dealcoholizing reactions by adding an alcohol solvent and an acid to a titanium precursor; and forming a photocatalyst layer by applying and drying, on the barrier layer, a composition formed by mixing visible light active photocatalyst particles with the TiO2 amorphous sol.