ARTICLE HAVING PHOTOCATALYTIC ACTIVITY

摘要

PROBLEM TO BE SOLVED: To provide an article covered with a phtocatalyst film which havs a high activity to an organic compound decomposition reaction and does not suffes action saturation or deterioration of photcatalytic action even by exposure to high intensity light or by exposure to light for a long period of time. SOLUTION: An article having a photocatalytic activity and formed by laminating a photocatalyst layer comprising an n type semiconductor and an electron accepting layer comprising an n type semiconductor having a larger energy band gap than that of the n type semiconductor of the phtocatalyst layer on the surface of a substrate is characterized in that one layer of the photocatalyst layer and the electron accepting layer, which is farther, from the substrate covers a part of the other layer nearer to the substrate.