EFFECT OF METAL IONS ON PHOTOCATALYTIC PERFORMANCE OF TiO2 FILM PREPARED BY MICRO-ARC OXIDATION

Abstract

The effect of different metal ions on the photocatalytic property of TiO2 film prepared by micro-arc oxidation was studied. Photocatalytic experiments showed that the impregnation of metal ions increased the photocatalytic efficiency of TiO2. The increase of transition element Fe[Formula: see text] and the rare earth element Dy[Formula: see text] is more obvious, and the optimum concentration is 0.1[Formula: see text]mol/L. The SEM results showed that there was no significant change on the surface of TiO2 film before and after metal ion immersion. The results of EDS surface scanning showed that Fe and Dy elements were uniformly distributed on the surface of TiO2 film after metal ion impregnation, and the deposition amounts were 0.81% and 3.39%, respectively. XRD results showed that a new phase was formed in Fe[Formula: see text]-impregnated TiO2, which could improve the photocatalytic efficiency.