A BiPO4/BiOCl heterojunction photocatalyst with enhanced electron-hole separation and excellent photocatalytic performance
A BiPO4/BiOCl heterojunction photocatalyst with enhanced electron-hole separation and excellent photocatalytic performance
复制标题
具有增强电子空穴分离和优异光催化性能的 BiPO4/BiOCl 异质结光催化剂
DOI：
10.1016/j.apsusc.2015.02.175
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发表时间：
2015-06-15
影响因子：
6.7
通讯作者：
Fan, Caimei
中科院分区：
文献类型：
--
作者：
Duo, Fangfang;Wang, Yawen;Fan, Caimei
采用一步水热法成功制备了BiPO 4/BiOCl异质结复合材料。采用XRD、SEM、TEM、UV-vis DRS、瞬态光电流和EIS等测试手段对催化剂的相结构、形貌、光学性能和电子空穴分离效应进行了表征。在模拟太阳光照射下，BiPO 4/BiOCl复合材料对橙子（MO）的光催化降解活性明显高于单一BiOCl和BiPO 4。此外，对BiPO_4/BiOCl复合物最佳协同摩尔比的稳定性测试表明，合成的p-n异质结BiPO_4/BiOCl光催化剂在5次循环后具有令人满意的重复利用率。瞬态光电流和交流阻抗测试结果表明，BiPO 4/BiOCl复合材料的表面结能有效地提高光催化过程中电子-空穴的分离速度，是其光催化活性大幅提高的主要原因。(C)2015爱思唯尔B. V.保留所有权利。
The novel BiPO4/BiOCl heterojunction composites were successfully fabricated by a facile one-step hydrothermal method. The XRD, SEM, TEM, UV-vis DRS, transient photocurrent and EIS measurements were employed to characterize the phase structures, morphologies, optical properties, and electron-hole separation effect of the photocatalysts. BiPO4/BiOCl composites exhibited much higher photocatalytic activity for the methyl orange (MO) degradation than single BiOCl and BiPO4 under simulated sunlight irradiation. Moreover, the stability test for the optimum synergetic molar ratio of BiPO4/BiOCl composites indicated that the synthetic p-n heterojunction BiPO4/BiOCl photocatalyst had the gratifying reutilization after five cycles. The results of transient photocurrent measurements and EIS demonstrated that the large enhancement of photocatalytic activity could be mainly ascribed to the surface junction of BiPO4/BiOCl composite which can effectively improve electron-hole separation speed during photocatalytic process. (C) 2015 Elsevier B.V. All rights reserved.