化工进展 ›› 2023, Vol. 42 ›› Issue (3): 1493-1507.DOI: 10.16085/j.issn.1000-6613.2022-0879

• 材料科学与技术 • 上一篇    下一篇

半导体光催化剂BiOCl异质结的构建及应用

胥生元1(), 郝玮1, 王杰1, 高文生2, 谢克锋1()   

  1. 1.兰州交通大学化学化工学院,甘肃 兰州 730070
    2.兰州大学化学化工学院,甘肃 兰州 730000
  • 收稿日期:2022-05-12 修回日期:2022-06-22 出版日期:2023-03-15 发布日期:2023-04-10
  • 通讯作者: 谢克锋
  • 作者简介:胥生元(1996—),男,硕士研究生,研究方向为功能材料。E-mail:xsyexw@163.com
  • 基金资助:
    国家自然科学基金青年基金(11905091);甘肃省青年科技基金(21JR7RA326);甘肃省高等学校创新基金(2021B-100)

Construction and application of BiOCl heterojunction as semiconductor photocatalyst

XU Shengyuan1(), HAO Wei1, WANG Jie1, GAO Wensheng2, XIE Kefeng1()   

  1. 1.School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China
    2.College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, China
  • Received:2022-05-12 Revised:2022-06-22 Online:2023-03-15 Published:2023-04-10
  • Contact: XIE Kefeng

摘要:

氯氧化铋(BiOCl)半导体因其独特的层状结构和可调控的电子结构,而在光催化解决环境问题和能源问题领域备受关注。为了提高BiOCl对太阳光的利用率、抑制光生电子-空穴对的高复合率和增强光电子的还原能力等,研究人员对此作出了巨大的努力。其中,构建异质结是最有效的削弱这些缺陷的方法之一。本文主要综述了Z-型、Ⅱ-型、p-n结以及S-型四类异质结的电荷传递机理以及重点介绍了一些具有优异光催化性能的BiOCl异质结。同时,对一些异质结的光催化降解性能进行了比较分析。其中,S型异质结不仅具有高效的电荷分离能力,还有强的氧化还原能力,因此其表现出优异的光催化性能。此外,本文还简述了BiOCl异质结在降解有机污染物、还原CO2、还原重金属和分解H2O等方面的应用。总结了当前BiOCl异质结遇到的一些问题。最后针对BiOCl异质结的构效关系、合成复杂等问题,提出了计算机模拟、载体负载、新技术开发的发展方向。

关键词: 氯氧化铋, 异质结, 光生电子-空穴对, 光催化剂, 半导体

Abstract:

Bismuth oxychloride semiconductor has attracted tremendous attention in the field of photocatalysis for solving environmental and energy issues due to its unique layered structure and adjustable electronic structure. The researchers have made much efforts that in order to improving the utilization rate of BiOCl for sunlight, overcoming the drawback of the high recombination rates of photogenerated electron-hole pairs, enhancing the reduction ability of photoelectrons and so on. Among them the construction of heterojunction is one of the most effective ways to reduce these drawbacks. In this article, the charge transfer mechanism in 4 junction systems, Z-scheme, Ⅱ-type, p-n junction and S-scheme, are summarized. Meanwhile, they are highlighted some BiOCl heterojunctions of excellently photocatalytic performance. At the same time, the photocatalytic degradation performance is compared and analyzed for some heterojunctions. The S-scheme heterojunctions achieved high-effectively charge separation and strong photo-redox ability which resulted in exhibited excellently photocatalytic performance. In addition, the application of BiOCl heterojunctions in the degradation of organic pollutants, reduction of CO2, reduction of heavy metals and splitting water etc. are introduced. Some problems of BiOCl heterojunction are summed up. Finally, in view of the BiOCl heterojunctions of structure-function relationship and complex synthesis etc., the development trend in computer simulation, carrier load and development of new technology is put forward.

Key words: bismuth oxychloride, heterojunction, photogenerated electron-hole pairs, photocatalyst, semiconductor

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