Liu Yazi, Yang Bing, He Huan, Yang Shaogui, Duan Xiaoguang, Wang Shaobin
School of Environment, Nanjing Normal University, Jiangsu Engineering Lab of Water and Soil Eco-Remediation, Nanjing 210023, PR China.
School of Environment, Nanjing Normal University, Jiangsu Engineering Lab of Water and Soil Eco-Remediation, Nanjing 210023, PR China; College of Ecological and Resource Engineering, Key Laboratory of Green Chemical Technology of Fujian Province University, Wuyi University, Wuyishan, Fujian 354300, PR China.
Sci Total Environ. 2022 Jan 15;804:150215. doi: 10.1016/j.scitotenv.2021.150215. Epub 2021 Sep 10.
As an emerging group of visible-light-driven photocatalysts, bismuth-based complex oxides have attracted considerable attention owing to their outstanding photo-oxidation ability and high performance in decomposition of organic contaminants and water oxidation via photocatalytic processes. However, the relatively low level of the conduction band limits their further application in photocatalytic hydrogen evolution and overall water splitting processes. In this paper, three representative and most-studied Bi-based complex oxides of BiOX (X = Cl, Br, I)/BiFeO/BiWO are discussed mainly for environmental pollutants degradation and oxygen generation from water splitting. We present a comprehensive overview of their fundamental compositions, electronic structures and synthesis strategies. On the basis of analyzing the structural-property-activity relationships, detailed approaches for enhancement of their photocatalytic performance have been addressed and compared including morphology/facets control, heterostructures construction and introduction of oxygen vacancies. In addition, several techniques such as engineering energy band and building a Z-scheme system have been proposed to modulate the energy band positions of the photocatalysts and overcome the bottleneck to realize overall water splitting into H and O simultaneously. Finally, remarks on the current challenges, research directions and future perspectives are presented to provide guidance for designing and configuring highly efficient solar-light-driven photocatalysts in the field of environmental purification and energy conversion.
作为新兴的可见光驱动光催化剂群体，铋基复合氧化物因其出色的光氧化能力以及在通过光催化过程分解有机污染物和水氧化方面的高性能而备受关注。然而，导带水平相对较低限制了它们在光催化析氢和整体水分解过程中的进一步应用。本文主要讨论了三种具有代表性且研究最多的Bi基复合氧化物BiOX（X = Cl、Br、I）/BiFeO/BiWO，用于环境污染物降解和水分解产氧。我们全面概述了它们的基本组成、电子结构和合成策略。在分析结构 - 性质 - 活性关系的基础上，探讨并比较了提高其光催化性能的详细方法，包括形貌/晶面控制、异质结构构建和氧空位引入。此外，还提出了诸如能带工程和构建Z型体系等几种技术来调节光催化剂的能带位置，克服瓶颈以实现同时将水整体分解为H₂和O₂。最后，对当前的挑战、研究方向和未来前景进行了阐述，为在环境净化和能量转换领域设计和配置高效的太阳光驱动光催化剂提供指导。
