| 摘要 |
PROBLEM TO BE SOLVED: To solve various problems that a photocatalytic material is hardly exposed to the surface, and a coating material gets discolored and deteriorated by photocatalytic action when the photocatalytic material blended in the coating material is color-developed in the desired color while keeping the photocatalytic activity and there is a limit to color development and the developed color has bad durability in a method for adhering the powdered photocatalytic material to a coloring resin sheet, and a substrate is limited and is difficult to be manufactured in a method of color developing by optical interference effect obtained by the surface treatment of a metal titanium plate, and that color is developed only in one direction and the performance is deteriorated by the surface contamination in a method using a diffraction grating. SOLUTION: A photocatalytic color developing body 3, which is shown as one row in the figure, is formed by laminating a thin film layer 2 of a supporting material such as silicon dioxide and a thin film layer 1 of the photocatalytic material as titanium dioxide having a large area on a substrate 4 of silicon or the like, which is shown in the figure as the one obtained by laminating eight pairs of the layers 1 and 2. The formed body 3 is arranged in plural rows to form the photocatalytic color developing member 5 having a large surface area as a whole. Both of the layers 1 and 2 are made to have thickness adjusted to λ/4 of the color developing light and subsequently the gap 10 becomes also λ/4. This member 5 is color-developed by optical interference and organic materials are decomposed by the photocatalyst in the member 5. |
