PHOTOCATALYST BASED ON COMPOSITE OXIDE RESPONSIVE TO VISIBLE LIGHT AND METHOD FOR DECOMPOSITION AND REMOVAL OF HARMFUL CHEMICAL MATERIAL USING THE SAME

摘要

Object: The present invention aims at providing a photocatalyst capable of utilizing not only an ultraviolet range but also a visible range in a manner to use the catalyst for a decomposition treatment of harmful chemical substances in a gaseous phase or liquid phase, thereby providing means for detoxifyingly treating harmful substances.;Solving Means: The problem is solved by preparing a photocatalyst comprising, as a catalytic component, a complex oxide semiconductor represented by a general formula (I): BaBi_xO_y (wherein x, y have values satisfying 0.5x2 and 2.5y4, respectively), and by using the photocatalyst.