METHOD FOR EVALUATING PHOTOCATALYTIC ACTIVITY AND FILM FOR EVALUATING PHOTOCATALYTIC ACTIVITY

摘要

PURPOSE: To provide a method for evaluating a photocatalytic activity easily without using a gas reaction or a biological reaction. ;CONSTITUTION: The method includes a process wherein an evaluation reaction substance (halogenated alkali aqueous solution 3) reacting with a hole or electron generated when the light is shed onto a substance having a photocatalytic activity (photocatalytic thin film 2) is applied to a surface to be evaluated, a process of casting ultraviolet, rays to the surface, and a process of determining the reacting amount of the evaluation reaction substance. In these processes, the evaluation reaction substance reacts, e.g. is oxidized or reduced, etc. The reacting amount is determined from a pH or a color change of the evaluation reaction substance, whereby a photocatalytic activity on the surface to be evaluated is quantitatively evaluated.;COPYRIGHT: (C)1996,JPO