Abstract: In order to improve the utilization of visible light, implantation of transition metals (V+, Cr+) and deposition of noble metals (Ag, Pt) through electron beam irradiation were used to modify TiO2 films prepared by the sol-gel method. A red shift was found in the ultraviolet-visible spectra of the modified TiO2 films. Photocatalytic degradation of methyl orange showed that the photocatalytic activity of TiO2 films under visible light irradiation was increased dramatically by the two methods.

Key words: beam irradiation modification, titania, electron beam, ion implantation, visible light, methyl orange, degradation