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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:: 45
期数:: 2023年02期

页码:: 126-138

栏目:: 综述

出版日期:: 2023-04-30

文章信息/Info

Title:: Progress in Photocatalysis of Step-Scheme Heterojunction

文章编号:: 1674 - 2869（2023）02 - 0126 - 13

作者:: 邓延平¹; 白浚贤²; 姜志民²; 李鑫^*2; 1. 华南农业大学材料与能源学院，广东广州 510642；
2. 华南农业大学生物质工程研究院，农业部能源植物资源与利用重点实验室，广东广州 510642

Author(s):: DENG Yanping¹; BAI Junxian ²; JIANG Zhimin²; LI Xin^*2; 1. College of Materials and Energy， South China Agricultural University， Guangzhou 510642， China；
2. Institute of Biomass Engineering， Key Laboratory of Energy Plants Resource and Utilization，Ministry of
Agriculture and Rural Affairs， South China Agricultural University， Guangzhou 510642， China

关键词:: 阶梯型异质结; 光催化剂; 费米能级; 机理

Keywords:: step-scheme heterojunction; photocatalyst; Fermi energy level; mechanism

分类号:: O643.31

DOI:: 10.19843/j.cnki.CN42-1779/TQ.202109021

文献标志码:: A

摘要:: 半导体光催化能源转换技术是解决未来环境和能源问题的有效的途径之一。为有效改进半导体光催化剂载流子分离性能、活性及稳定性，诸多异质结能带理论已经被研究。在深入剖析传统II型及Z型异质结不足的基础上，余家国于2019年提出一种新的阶梯（S）型异质结的概念。这种S型异质结主要由功函数较小、费米能级较高的还原型半导体光催化剂（RP）和功函数较大、费米能级较低的氧化型半导体光催化剂（OP）通过错开型方式构建而成，S型异质结在抑制不必要的电子空穴复合的同时保留了更强的光催化氧化及还原能力，这些优势使得S型异质结光催化理论和材料体系发展迅速，已成为近年来光催化领域一个新兴的研究热点。本文重点介绍S-型异质结光催化的概念起源和原理创新，详细阐述了各种证实S型异质结的表征方法，讨论了S型异质结光催化剂在光催化H2生产、CO2还原、污染物降解及H2O2生产等领域的最新进展，综述S型异质结催化剂的未来发展的挑战，为S型异质结光催化剂在分子和原子水平上精准操纵光生电荷分离提供新的设计思路和方法。

Abstract:: Semiconductor-based photocatalytic energy conversion has become a very effective approach to solve the problems of environment and energy. To effectively improve the carrier-separation performance，activity and stability of semiconductor photocatalysts，many heterojunction energy band theories have been developed. On the basis of in-depth analysis of the shortcomings of traditional type II and Z-scheme heterojunctions，the concept of a new step-scheme （S-scheme） heterojunction was proposed by Yu Jiaguo in 2019. This S-scheme heterojunction is mainly composed of reductive semiconductor photocatalyst with a smaller work function and a higher Fermi energy level，and oxidized semiconductor photocatalyst with a larger work function and a lower Fermi energy level，which is constructed in a staggered manner. Apparently，the S-scheme heterojunction can effectively inhibit the unnecessary electron hole recombination and maintain much stronger photocatalytic oxidation and reduction ability. These advantages have led to the rapid development of the theory and material systems of S-scheme heterojunction photocatalysts，which has become a new research hotspot in the field of photocatalysis in recent years. This work mainly focuses on the concept origin and principle innovation of S-scheme heterojunction photocatalysts，fully analyzes various characterization methods for confirming S-scheme heterojunction，discusses the latest progress of S-scheme heterojunction photocatalysts in different fields，such as photocatalytic H2 evolution，CO2 reduction，degradation of pollutants and H2O2 production，summarizes the challenges of the future development of S-scheme heterojunction photocatalysts，and provides new design ideas and methods for the precise manipulation of photogenerated charge separation in S-scheme heterojunction photocatalysts at the molecular and atomic levels.

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备注/Memo:: 收稿日期：2021-09-26
基金项目：国家自然科学基金（21975084，51672089）
*通讯作者：李鑫，博士，教授。E-mail：Xinli@scau.edu.cn
引文格式：邓延平，白浚贤，姜志民，等. 阶梯型异质结光催化研究进展［J］. 武汉工程大学学报，2023，45（2）：126-138.

更新日期/Last Update: 2023-05-04

《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

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