PROBLEM TO BE SOLVED: To provide a photocatalyst composite material having high activity, which can be easily manufactured and hardly peels, a method for manufacturing the composite material, and a photocatalyst device.MEANS FOR SOLVING THE PROBLEM: The photocatalyst composite material comprises a substrate and a photocatalyst layer comprising photocatalyst particles, in which an average particle diameter of the photocatalyst layer in contact with the substrate surface is smaller than an average particle diameter of the photocatalyst layer surface.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】高活性で簡便に作製でき剥がれにくい光触媒複合材料、その作製方法および光触媒装置を提供する。【課題手段】基材と光触媒粒子から成る光触媒層から成り、基材表面に接する光触媒層の平均粒子径が光触媒層表面の平均粒子径より小さい光触媒複合材料。【選択図】図１
