Bi4O5BrI Solid Solution towards Boosted Photocatalytic Reduction and Oxidation Activities Induced by Efficient Carrier Separation

IF 1.5 4区材料科学 Q3 CRYSTALLOGRAPHY

Crystal Research and Technology Pub Date : 2021-04-02 DOI:10.1002/crat.202000240

Jia Zhang, Zhen Wang, Lu Liu, Baorong Hu, Yilei Zhao, Shuang Zhao, Wenting Zhao, Shuang Li, Xi Chen, X. Hai

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引用次数: 1

Abstract

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.

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高效载体分离诱导Bi4O5BrI固溶体增强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降解技术，但其载流子分离效率低是制约其获得高性能的主要因素之一。本研究报告了一种固溶策略，以实现Bi4O5BrxI2−x的有效载流子分离。固溶体结构使Bi4O5BrxI2−x具有良好的光吸附性能、可调的带隙以及光电子与空穴的有效分离。结果表明，在可见光照射下，Bi4O5BrxI2−x具有高效光催化还原Cr(VI)和降解盐酸四环素(HTC)的活性，在x = 1时活性达到最大值。在30 min内，Cr(VI)和HTC的去除率分别达到90%和100%。该研究不仅为提高铋基半导体的载流子分离率提供了有效的策略，而且为合理设计其他高性能固溶催化剂在废水处理中的应用开辟了新的机遇。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Crystal Research and Technology 化学-晶体学

自引率

6.70%

发文量

121

审稿时长

1.9 months

期刊介绍： The journal Crystal Research and Technology is a pure online Journal (since 2012). Crystal Research and Technology is an international journal examining all aspects of research within experimental, industrial, and theoretical crystallography. The journal covers the relevant aspects of -crystal growth techniques and phenomena (including bulk growth, thin films) -modern crystalline materials (e.g. smart materials, nanocrystals, quasicrystals, liquid crystals) -industrial crystallisation -application of crystals in materials science, electronics, data storage, and optics -experimental, simulation and theoretical studies of the structural properties of crystals -crystallographic computing