摘要
随着人类工业活动的不断加剧,化工、制药、印染、电镀等多个行业排放的废水已成为环境治理领域中亟待破解的重大课题,光催化技术是去除水中有机污染物的有效方法。Bi_(2)WO_(6)是具有可见光响应能力的光催化剂(带隙为2.7 eV),是由[Bi_(2)O_(2)]^(2+)和[WO_(4)]^(2-)八面体层交替构成的二维奥里维里斯(Aurivillius)结构氧化物半导体,化学性质稳定,可在太阳光驱动条件下实现对有机污染物的降解。但其吸附和活化氧的能力有限、光生载流子复合率高、可见光响应范围窄(λ≤460 nm)等问题在一定程度上制约着其光催化综合性能的提升。围绕以上不足开展包括形貌调控、缺陷工程、元素掺杂、异质结构筑、金属粒子沉积在内的诸多改性研究。概述几种针对Bi_(2)WO_(6)材料改性的方法与机理,总结相关研究进展,针对不足展望未来可能的研究方向,为Bi系光催化剂材料的设计与改性研究提供借鉴。
With the intensification of human industrial activities,wastewater discharge from multiple sectors,including chemical manufacturing,pharmaceuticals,textile dyeing,and electroplating,has become a critical challenge requiring ur⁃gent resolution in environmental governance.Photocatalytic technology offers an effective approach for removing organic pol⁃lutants from water bodies.Bi_(2)WO_(6)is a photocatalyst responsive to visible light(bandgap 2.7 eV),featuring a two⁃dimen⁃sional olivine⁃type oxide semiconductor structure composed of alternating[Bi_(2)O_(2)]^(2+)and[WO_(4)]^(2-)octahedral layers.This ma⁃terial exhibits chemical stability and can degrade organic pollutants under sunlight⁃driven conditions.However,its overall photocatalytic performance is constrained by limitations such as restricted adsorption capacity and reactive oxygen species generation,high recombination rates of photo⁃generated carriers,and a narrow visible light response range(λ≤460 nm).Nu⁃merous researchers have addressed these limitations through various modification strategies,including morphological con⁃trol,defect engineering,elemental doping,heterostructure construction,and metal particle deposition.The several modification methods and mechanisms for Bi_(2)WO_(6)materials were summarized,relevant research progress were systematically orga⁃nized,and future research directions were proposed to overcome existing limitations.It was aimed to provide theoretical guid⁃ance for the design and modification of bismuth⁃based photocatalytic materials.
作者
马亮
王春燕
刘海宁
李明珍
宋忠梅
张思远
叶秀深
MA Liang;WANG Chunyan;LIU Haining;LI Mingzhen;SONG Zhongmei;ZHANG Siyuan;YE Xiushen(Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Key Laboratory of Green and High-end Utilization of Salt Lake Resources,Xi′ning 810008,China;Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province,Xi′ning 810008,China;University of Chinese Academy of Sciences,Beijing 101408,China)
出处
《无机盐工业》
北大核心
2025年第12期1-7,62,共8页
Inorganic Chemicals Industry
基金
国家自然科学基金项目(12505291)
青海省科技项目(2025-HZ-803)
青海省“昆仑英才·高端创新创业人才”计划项目(E340HX11)。
