摘要
We reported on a novel visible responding ZnO/Bi<sub>2sub>WO<sub>6sub> heterojunction photocatalyst for the efficient photodegradation of pollutant. The heterojunction photocatalysts were prepared by dispersing the Bi<sub>2sub>WO<sub>6sub> precursor into Zn(OH)<sub>2sub> solution, the precipitates at 500 掳C to form Bi<sub>2sub>WO<sub>6sub> and ZnO crystals simultaneously. Compared to individual ZnO and Bi<sub>2sub>WO<sub>6sub>, ZnO/Bi<sub>2sub>WO<sub>6sub> significantly improved photocatalytic properties with high stability due, we believe, to high efficient separation of the photogenerated charge at the ZnO/Bi<sub>2sub>WO<sub>6sub> interface under visible light irradiation. It was found that ZnO contents in the heterojunction photocatalyst significantly influenced charge separation and transfer at the interface. With reintroduction of Pt nanoparticles, the photocatalytic activity of ZnO/Bi<sub>2sub>WO<sub>6sub> could be further enhanced for specific issues, such as degradation of sensitized Rhodamine B (Rh.B) dye. In this work, we determined that the ZnO/Bi<sub>2sub>WO<sub>6sub> heterojunction with a tunable property can be applied to wide solar energy conversion.