铁酸铋光催化复合光催化材料的研究进展

Research Progress of Bismuth Ferrite Photocatalytic Composite Photocatalytic Materials

近年来,环境污染日益受到人们广泛的关注,特别是工业废水和生活废水对水资源的污染,科技工作者正致力于寻找解决水体污染的方法。半导体光催化剂被广泛用于水污染治理,常见的光催化材料主要有纳米TiO_(2)、WO_(3)、SrTiO_(3)等。一些贵金属元素(铂、铑、钯等)具有更好的光催化辅助性能,但由于部分半导体光催化剂不稳定或易发生光化学腐蚀,而贵金属成本较高,都不适宜大规模使用。在众多光催化材料中,铁酸铋(BiFeO_(3))由于具有较低的禁带宽度(≈2.5 eV)和非常稳定的钙钛矿结构,因此受到了广泛的关注。总结了BiFeO_(3)光催化剂的制备方法及制备条件对BiFeO_(3)结构和性能的影响、BiFeO_(3)的光催化降解机理以及BiFeO_(3)的改性方法,从而更好地提高其光降解能力,展望了今后的研究方向。

Recently,environmental pollution has attracted widespread attention,especially the pollution of water resources from various aspects of industry and life.So that reserachers are trying to find solutions to water pollution.Semiconductor photocatalysts have been widely used to solve water pollution.Common photocatalytic materials mainly include nano-TiO_(2),WO_(3),SrTiO_(3),etc.,and some precious metals(platinum,rhodium,palladium,etc.)have better photocatalytic performance,but most of them are prone to chemical or photochemical corrosion,and the high cost of precious metals is not suitable for large-scale use.Among many photocatalytic materials,bismuth ferrite(BiFeO_(3))has a low band gap(≈2.5 eV)and has very good structural stability so that it has been widely concerned.This article reviews preparation methods of BiFeO_(3)photocatalyst and the influence of different preparation conditions on BiFeO_(3)crystal form,the photocatalytic mechanism of BiFeO_(3),the modification of BiFeO_(3)to improve photocatalytic activity,and prospects for future research directions.