BiOCl的高效合成方法及其光催化降解苯酚性能研究  

Efficient Synthesis Method of BiOCl and Its Photocatalytic Degradation Performance of Phenol

作　　者：李晓佳 刘顺 张静 周鑫 杨运泉[1] 李正科 Li Xiaojia;Liu Shun;Zhang Jing;Zhou Xin;Yang Yunquan;Li Zhengke(School of Chemical Engineering,Xiangtan University,Xiangtan 411105,China)

机构地区：[1]湘潭大学化工学院,湖南湘潭411105

出　　处：《广东化工》2025年第4期32-35,共4页Guangdong Chemical Industry

基　　金：湖南省大学生创新创业训练计划项目(S202310530074);湖南省教育厅一般项目(20C1770)。

摘　　要：铋系半导体材料具有特殊的层状结构以及合适的带隙,具有良好的可见光响应能力以及稳定的光化学特性,是重要的光催化剂。本研究采用甘油和氢氧化钠溶解氧化铋,再分别加入不同酸调节溶液pH,合成了三种不同阴离子插层(Cl^(-)、NO_(3)^(-)、SO_(4)^(2-))的铋基光催化剂,具有合成速率快和操作简单的特点。实验以苯酚为底物对催化剂性能进行比较,发现BiOCl催化降解苯酚性能最佳,分析表征结果显示,三种催化剂中BiOCl具有特殊的二维层状结构、良好结晶度和高比表面积,可能是其性能最好的原因。进一步优化BiOCl的合成和降解苯酚条件,向60 mg/L苯酚溶液中投加0.1 g/L的pH为6时合成的BiOCl催化剂,紫外光照射3小时后降解率达到80%,当催化剂为0.2 g/L时,降解率达到96.6%。在考察的浓度范围内,BiOCl催化降解苯酚反应动力学服从零级反应规律。Bismuth-based semiconductor materials with special layered structure as well as suitable bandgap,good visible light responsivity and stable photochemical properties,it is an important photocatalyst.In this study,three bismuth-based catalysts with different anionic intercalations(Cl^(-),NO_(3)^(-),SO_(4)^(2-))were synthesized by dissolving bismuth oxide with glycerol and sodium hydroxide,and then adjusting the pH of the solution by adding different acids,respectively,with fast synthesis rate and simple operation.The performance of the catalysts was compared with phenol as the substrate,found that BiOCl has the best catalytic performance for the degradation of phenol.The analytical characterization results showed that the special two-dimensional layered structure,good crystallinity and high specific surface area of BiOCl among the three catalysts,it might be the reason for its best performance.The synthesis of BiOCl and the conditions for phenol degradation were further optimized.The BiOCl catalyst synthesized at pH 6 was injected 0.1 g/L into 60 mg/L phenol solution,and the degradation rate reached 80%after 3 h of UV irradiation,and 96.6%when the catalyst was 0.2 g/L.The kinetics of the BiOCl-catalyzed phenol degradation reaction obeyed the zero-order reaction law in the examined concentration range.

关 键 词：化学沉淀法 氯氧化铋 光催化剂 降解 反应动力学 

分 类 号：X703[环境科学与工程—环境工程] O644.1[理学—物理化学] O634.36[理学—化学]