科研之友
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摘要
AgBr nanoparticles loaded BiPO4 microrods have been successfully synthesized via a facile deposition-precipitation method. XRD, FE-SEM, TEM, EIS, UV-Vis-DRS techniques were employed to characterize the phase composition, morphology and light absorption properties of the as-synthesized samples. Methylene blue (MB) and phenol (Ph) were selected as model pollutant to investigate the photocatalytic activity of the as-synthesized samples under visible-light irradiation. The experimental results show that different amount of AgBr on BiPO4 exhibit an obvious effect on the degradation of MB and the optimum molar ratio of AgBr and BiPO4 is 1 : 10. In particular, the photocatalytic activity of AgBr/BiPO4 is superior to the activities of two individual photocatalyst, indicating the presence of a synergic effect between two component in AgBr/BiPO4. On the basis of photocatalytic results and energy band diagram, the activity enhancement mechanism of AgBr/BiPO4 composite has also been investigated. The p-type semiconductor AgBr and n-type semiconductor BiPO4 can match each other and form a novel p-n heterojunction, thus increasing the photogenerated electron-hole pair separation efficiency. Therefore, this work provides some help for the design of novel and efficient BiPO4-based photocatalyst with multi-components for enhancing visible-light-driven photocatalytic activity.
- 出版日期2015
- 单位延安大学
