铋基材料光催化还原水中六价铬的研究进展  

Recent advances in the development of bismuth-based materials for the photocatalytic reduction of hexavalent chromium in water

作　　者：孙阳 Jan E.Szulejko Ki-Hyun Kim Vanish Kumar 李小伟 Yang Sun;Jan E.Szulejko;Ki-Hyun Kim;Vanish Kumar;Xiaowei Li(Department of Civil and Environmental Engineering,Hanyang University,Seoul 04673,Korea;National Agri-Food Biotechnology Institute(NABI),S.A.S.Nagar,Punjab 140306,India;School of Environmental and Chemical Engineering,Organic Compound Pollution Control Engineering,Ministry of Education,Shanghai University,Shanghai 200444,China)

机构地区：[1]汉阳大学土木与环境工程系,首尔,韩国 [2]国家农业食品生物技术研究所(NABI),旁遮普邦纳加尔,印度 [3]上海大学环境与化学工程学院,有机化合物污染控制工程教育部重点实验室,中国上海200444

出　　处：《Chinese Journal of Catalysis》2023年第12期20-43,共24页催化学报（英文）

基　　金：supported partially by a grant from the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (MSIT) of the Korean government (2021R1A3B1068304)。

摘　　要：光催化还原是处理水溶液体系中六价铬(Cr(VI))的一种新方法.层状铋(Bi)基材料具有增强的光捕获能力和可调的带隙能量,被认为是一种光催化还原去除Cr(VI)的有效材料.本文从修饰策略(如异质结、缺陷工程和掺杂)和工艺变量(如溶液p H和添加剂的类型/数量)等方面,对用于光催化还原处理Cr(VI)的铋基材料的改进机制进行深入总结.此外,采用工业上用作关键指标的优值系数(FoM),对各种铋基材料的性能进行评估.结果发现,平均粒径为5-10 nm,具有shuriken形状的BiVO_(4)具有最高的FoM值(3.45×10^(-5) molg^(-1)Wh^(-1)),且其光催化还原性能最好.同时,与其他非铋基催化剂相比,BiVO_(4)的光催化还原Cr(VI)性能也具有很好的优势.但是,目前铋基催化剂成本较高,且光催化还原过程能耗较大,距离大规模实际应用还有一定的距离.未来,为实现铋基催化剂光催化还原处理含Cr(VI)废水的大规模应用,应大幅度降低催化剂的生产成本,并提高催化剂光子吸收效率从而进一步提高能源利用率.Photocatalytic reduction(PCR) is an emerging option to treat hexavalent chromium(Cr(VI)) in aquatic systems.The lamellar bismuth(Bi)-based materials are recognized as a potential platform for PCR against Cr(VI) with enhanced light harvesting ability and tunable bandgap energy.The PCR mechanism of Bi-based materials against Cr(VI) has been explored in relation to the modification strategies(e.g.,heterojunction,defect engineering,and doping) and to the process variables(e.g.,solution p H and the type/quantity of additives).Performance evaluation of diverse Bi-based materials has also been made using a figure of merit(Fo M) as the key metric for industrially relevant conditions.Accordingly,shuriken-shaped BiVO_(4) with average particle sizes of 5-10 nm was recognized as the best performer with the highest FoM value(3.45×10~(-5)mol g~(-1) Wh~(-1)).To scale up the utility of Bi-based materials against Cr(VI),further efforts should be directed toward drastic reduction of treatment costs for real-world applications,especially in terms of catalyst fabrication and energy consumption(due to poor quantum yield).

关 键 词：光催化 铬 半导体 铋 优值系数 

分 类 号：O64[理学—物理化学]