水污染治理是当前环境领域的重大挑战,传统污水处理方式存在着二次污染、耗能高等诸多问题。而钨酸铋(BWO)作为层状钙钛矿光催化剂,其可见光响应特性和内置电场使得污染物的降解变得绿色、低碳,但其宽禁带、载流子复合及表面反应动力学缓慢等问题仍需突破。系统总结了BWO基压电-光催化材料的作用机制及改性进展:通过金属、非金属的掺杂调整带隙,增强其吸收光能力;通过异质结的构建、极化电场的调控,促进光生载流子的分离;通过形貌调控、表面修饰等措施,增大催化剂比表面积,使表面活性位点增多,从而提高反应速度。系统地总结了钨酸铋作为压电光催化剂降解污染物所存在的问题和改进的方向,为后续研究提供改性思路。
Water pollution control poses a significant challenge in the environmental field,as traditional wastewater treatment methods are often plagued by secondary pollution and high energy consumption.Bismuth tungstate (BWO),as a layered perovskite photocatalyst,enables green and low-carbon pollutant degradation due to its visible-light response and built-in electric field.However,its application is hindered by issues such as a wide bandgap,carrier recombination,and slow surface reaction kinetics.This study systematically reviewed the mechanisms and modification progress of BWO-based piezo-photocatalytic materials.Metal and nonmetal doping strategies were employed to narrow the bandgap and enhance light absorption,while heterojunction construction and polarization electric field regulation effectively promoted photogenerated carrier separation.Morphology control and surface modification further increased the specific surface area and exposed more active sites,boosting reaction rates.This review systematically summarized existing challenges and improvement directions for BWO-based piezo-photocatalysis,providing insights for future research.
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基金资助
吉林省教育厅项目(JJKH20240566CY);吉林省科技厅项目(2023101213JC);吉林省科技厅项目(YDZJ202401579ZYTS)
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