[Preparation of ZnTiO/TiO Photocatalyst and Its Mechanism on Photocatalytic Degradation of Organic Pollutants].

TiO is a promising photocatalysis for degradation of organic pollutants due to its innocuity. However, its widespread practical application was hindered by the fast combination speed of photogenerated electron-hole pairs and low quantum efficiency. In this study, we prepared ZnTiO-TiO using the Sol-Gel method to get heterojunctions, which exhibit efficient separation of photogenerated electron-hole pairs. The photocatalytic performances of various ZnTiO-TiO were evaluated by the removal efficiency of Methyl orange. The experimental results showed that the ZnTiO-TiO(ZnTiO:TiO=0.3), which was calcinated under 600℃, had the best photocatalytic activity under ultraviolet light. The photocatalyst was stable under a wide range of pH (2.5-12.5). The photocurrent and ESR analysis verified the superior photocatalysis of ZnTiO-TiO, which was attributed to the efficient separation of electron-hole pairs induced by the heterojunctions.