BiPO4/BiOBr p–n junction photocatalysts: One-pot synthesis and dramatic visible light photocatalytic activity
BiPO4/BiOBr p–n junction photocatalysts: One-pot synthesis and dramatic visible light photocatalytic activity
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DOI：
10.1016/j.materresbull.2014.12.020
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发表时间：
2015-03
影响因子：
5.4
通讯作者：
Zhangsheng Liu;Biantao Wu;Jinan Niu;P. Feng;Yabo Zhu
中科院分区：
文献类型：
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作者：
Zhangsheng Liu;Biantao Wu;Jinan Niu;P. Feng;Yabo Zhu
采用一锅溶剂热法成功合成了BiPO4/BiOBrp-n结光催化剂。用X射线衍射仪、FE-SEM、HRTEM、XPS、DRS、PL和EIS对产物进行了表征。将BiPO4纳米粒子嵌入到BiOBR分级微球中，得到了BiPO4/BiOBR复合材料。与BiPO4和BiOBr相比，它们对罗丹明B(RhB)的降解表现出显著的可见光催化活性。其中，10%BiPO4/BiOBR的降解活性最大，其降解速率约为纯BiOBR的3倍。光催化活性的提高可能是由于BiPO4/BiOBrp-n结的形成，导致了光生电子-空穴对的有效分离和转移。此外，捕集实验还证实了自由基DOTO2、−和H+是导致罗丹明B降解的主要活性物种。
BiPO4/BiOBr p–n junction photocatalysts were successfully synthesized via a facile one-pot solvothermal method. The products were characterized by XRD, FE-SEM, HRTEM, XPS, DRS, PL and EIS. The obtained BiPO4/BiOBr composites were constructed by inlaying BiPO4nanoparticles into BiOBr hierarchical microspheres. Compared with BiPO4and BiOBr, they exhibited significantly enhanced visible light photocatalytic activity towards the degradation of Rhodamine B (RhB). Among them, 10% BiPO4/BiOBr showed the maximum value of the activity, whose degradation rate was about three times higher than that of pure BiOBr. The enhanced photocatalytic activity could be attributed to the formation of the BiPO4/BiOBr p–n junction, which resulted in the effective separation and transfer of photogenerated electron–hole pairs. Moreover, the trapping experiments confirmed that radical dotO2−andh+were the main active species responsible for the degradation of RhB.