环境保护科学2024，Vol.50Issue(1)：155-162,8.DOI:10.16803/j.cnki.issn.1004-6216.202211065
PMS协同Ce改性BiOBr材料光催化降解四环素
Photocatalytic degradation of tetracycline through PMS-assisted Ce-modified BiOBr under visible light
摘要
Abstract
The Ce(Ⅲ)modified BiOBr catalyst(Ce/Bi molar ratio 0.1%～2%)was prepared by solvothermal synthesis method,and its structure was characterized by XRD,SEM-mapping,XPS and UV-Vis.Taking tetracycline as the target pollutant,a PMS/Ce(Ⅲ)modified BiOBr photocatalytic system was proposed for the first time to degrade tetracycline.The effects of catalyst type,catalyst dosage,molar concentration of PMS and pH on the degradation of tetracycline in the reaction system were investigated.The results showed that the isomorphic substitution of Ce(Ⅲ)and Bi(Ⅲ)made the maximum absorption wavelength of Ce(Ⅲ)modified BiOBr appear blue shift,which improved the separation efficiency of photogenerated electrons and holes.The optimal conditions for photocatalytic degradation of tetracycline by BiOBr modified by PMS and Ce(Ⅲ)were as follows:molar ratio of Ce to Bi was 1%,with a dosage of 1.0 g/L and PMS of 0.3 mmol/L,at pH=9.In the process of tetracycline degradation,the main active species in the reaction system were holes,whose contribution was much higher than that of sulfate radical and singlet oxygen.It is proved that the structure of Ce modified BiOBr material has good stability by repeated utilization experiment.关键词
Ce改性BiOBr/过一硫酸盐/光催化降解/四环素/活性物种Key words
Ce/BiOBr/PMS/photocatalytic degradation/tetracycline/active species分类
资源环境引用本文复制引用
李文涛,黄雪咪,钟文祥,黄芳,杨惠彬,郭建宁,肖峰,钟润生..PMS协同Ce改性BiOBr材料光催化降解四环素[J].环境保护科学,2024,50(1):155-162,8.基金项目
深圳信息职业技术学院校级科研项目(SZIIT2021KJ026) （SZIIT2021KJ026）
