BiOI光催化性能的调控机制  

Regulation mechanism of BiOI photocatalytic performance

作　　者：孔婷 张金牛 姜紫赫 魏秀梅[2,3] 李金萍 KONG Ting;ZHANG Jinniu;JIANG Zihe;WEI Xiumei;LI Jinping(School of Science,Xi′an University of Posts and Telecommunications,Xi′an 710121,Shaanxi,China;School of Physics and Information Technology,Shaanxi Normal University,Xi′an 710119,Shaanxi,China;Xi′an Key Laboratory of Optical Information Manipulation and Augmentation,Xi′an 710119,Shaanxi,China)

机构地区：[1]西安邮电大学理学院,陕西西安710121 [2]陕西师范大学物理学与信息技术学院,陕西西安710119 [3]西安市光信息调控与增强技术重点实验室,陕西西安710119

出　　处：《陕西师范大学学报（自然科学版）》2022年第1期43-52,共10页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金(92050112,12074237)。

摘　　要：由于特殊的层状结构及良好的光催化性能,BiOI作为新型的半导体光催化剂被广泛研究,但由于其带隙较小,电子和空穴容易复合,需要各种调控策略以改善BiOI材料的光催化活性。基于半导体光催化原理,综述了BiOI光催化剂的主要调控机制,详细讨论了空位缺陷、掺杂缺陷、面调控、异质构建和贵金属修饰等改性方法对BiOI光催化性能的影响。揭示了由增强的光吸收和电荷载流子的分离效率增强,进而调控BiOI的电子结构和光学性质,最终改善其光催化活性。对光和BiOI微纳结构相互作用机理的探讨,可为开发新型高性能的半导体光催化技术提供有益参考。Since its special layered structure and better photocatalytic performance,BiOI has been widely studied as a new type of semiconductor photocatalyst.However,due to the small band gap,electrons and holes of BiOI are prone to recombination.Therefore,researchers have tried various strategies to improve the photocatalytic activity of BiOI materials.Based on the principle of semiconductor photocatalysis,this paper reviews the research progress and regulation mechanism of BiOI photocatalyst in recent years.The effects of modification methods such as vacancy defects,doping defects,surface regulation,heteroconstruction and noble metal modification on the photocatalytic performance of BiOI are introduced in detail.It is revealed that regulating the electronic structure and optical properties of BiOI could improve its photocatalytic activity due to enhanced light absorption and enhanced separation efficiency of charge carriers.The discussion on the interaction mechanism of light and BiOI micro-nano structure will provide a new way to break through the technical bottleneck of semiconductor photocatalytic materials,develop sustainable and clean environmental energy,design novel high-performance semiconductor photocatalytic technology,and promote the practical application of BiOI in the field of photocatalysis.

关 键 词：光催化 半导体 空位 掺杂 载流子 

分 类 号：O643[理学—物理化学]