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Bi4O5BrI Solid Solution towards Boosted Photocatalytic Reduction and Oxidation Activities Induced by Efficient Carrier Separation
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2021-04-02 , DOI: 10.1002/crat.202000240 Jia Zhang 1 , Zhen Wang 2 , Lu Liu 1 , Baorong Hu 1 , Yilei Zhao 1 , Shuang Zhao 1 , Wenting Zhao 1 , Shuang Li 1 , Xi Chen 1 , Xin Hai 1
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2021-04-02 , DOI: 10.1002/crat.202000240 Jia Zhang 1 , Zhen Wang 2 , Lu Liu 1 , Baorong Hu 1 , Yilei Zhao 1 , Shuang Zhao 1 , Wenting Zhao 1 , Shuang Li 1 , Xi Chen 1 , Xin Hai 1
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Semiconductor photocatalysis is considered a promising technology for destroying pollutants, while the faint carrier separation efficiency of the photocatalyst is one of the main limitations for obtaining high performance. This study reports a solid solution strategy to achieve effective carrier separation in Bi4O5BrxI2−x. The solid solution structure endows Bi4O5BrxI2−x with proper light adsorption, tunable band gap, and effective separation of photogenerated electrons and holes. As a result, Bi4O5BrxI2−x exhibits reduction and oxidation activities for highly efficient photocatalytic Cr(VI) reduction and tetracycline hydrochloride (HTC) degradation under visible light irradiation, with the activity reaching the maximum at x = 1. Within 30 min, the removal rates of Cr(VI) and HTC reach 90% and 100%, respectively. This study not only provides an effective strategy to increase the carrier separation of bismuth-based semiconductors, but also opens new opportunities to rationally design other solid solution catalysts with high performance in wastewater treatment.
中文翻译：
Bi4O5BrI 固溶体通过有效的载体分离提高光催化还原和氧化活性
半导体光催化被认为是一种很有前途的污染物破坏技术，而光催化剂的微弱载流子分离效率是获得高性能的主要限制之一。该研究报告了一种在 Bi 4 O 5 Br x I 2− x 中实现有效载流子分离的固溶体策略。固溶体结构赋予 Bi 4 O 5 Br x I 2− x适当的光吸收、可调带隙以及光生电子和空穴的有效分离。结果，Bi 4 O 5 Br x I 2−x在可见光照射下对高效光催化 Cr(VI) 还原和四环素盐酸盐 (HTC) 降解表现出还原和氧化活性，在x = 1 时活性达到最大值。 30 分钟内，Cr(VI) 的去除率HTC 分别达到 90% 和 100%。该研究不仅为提高铋基半导体的载流子分离提供了一种有效的策略，而且为合理设计其他在废水处理中具有高性能的固溶体催化剂开辟了新的机会。
更新日期：2021-04-02
中文翻译：
Bi4O5BrI 固溶体通过有效的载体分离提高光催化还原和氧化活性
半导体光催化被认为是一种很有前途的污染物破坏技术，而光催化剂的微弱载流子分离效率是获得高性能的主要限制之一。该研究报告了一种在 Bi 4 O 5 Br x I 2− x 中实现有效载流子分离的固溶体策略。固溶体结构赋予 Bi 4 O 5 Br x I 2− x适当的光吸收、可调带隙以及光生电子和空穴的有效分离。结果，Bi 4 O 5 Br x I 2−x在可见光照射下对高效光催化 Cr(VI) 还原和四环素盐酸盐 (HTC) 降解表现出还原和氧化活性，在x = 1 时活性达到最大值。 30 分钟内，Cr(VI) 的去除率HTC 分别达到 90% 和 100%。该研究不仅为提高铋基半导体的载流子分离提供了一种有效的策略，而且为合理设计其他在废水处理中具有高性能的固溶体催化剂开辟了新的机会。
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