Photocatalytic degradation of methylene blue by TiO_2 film and Au particles-TiO_2 composite film

摘要

Photodegradation and demethylation reactions of methylene blue (MB) by a TiO_2 photocatalytic film have been studied spectrophotometrically by estimating molar concentration changes of MB and demethylated species in an MB aqueous solution according to the Beer-Lambert law. On the other hand, MB was less demethylated by the reaction with an Au particles-TiO_2 (Au-TiO_2) composite film.