Bi-MOF衍生的中空BiOBr纳米棒用于高效光催化降解环丙沙星  

Bi-MOF-derived Hollow BiOBr nanorods for Efficient Photocatalytic Degradation of Ciprofloxacin

作　　者：马宇 胡军成[1] 刘玉琴 蒋青青[1] MA Yu;HU Juncheng;LIU Yuqin;JIANG Qingqing(School of Chemistry and Materials Science,South-Central Minzu University,Wuhan 430074,China)

机构地区：[1]中南民族大学化学与材料科学学院,湖北武汉430074

出　　处：《徐州工程学院学报（自然科学版）》2024年第2期50-56,共7页Journal of Xuzhou Institute of Technology(Natural Sciences Edition)

基　　金：国家自然科学基金项目(22272207)。

摘　　要：随着抗生素使用量的不断增加,抗生素引起的水污染日益严重,需要一种可行的解决方案来修复含有抗生素的废水.以Bi-MOF(CAU-17)为模板,制备中空BiOBr纳米棒(hBOB)用于高效光催化降解环丙沙星(CIP).与BiOBr纳米片(sBOB)相比,hBOB具有更大的比表面积和更高的电荷分离效率.在模拟太阳光下30 min的降解效率达到92.5%,降解速率常数是sBOB的2.5倍.通过固体漫反射(DRS)、荧光(PL)、光电流(I-t)、阻抗(EIS)等表征分析光降解能力增强的原因.结果表明多孔结构和纳米片组装的存在缩短了载流子的扩散距离,有利于光生载流子的分离和转移,因此hBOB具有良好的去除CIP的能力.此外,还利用莫特肖特基测试(M-S)和电子自旋共振(ESR)表征研究了光催化降解CIP的机理.With the increasing use of antibiotics,antibiotic-induced water pollution is more serious,and a feasible solution is needed to remediate antibiotic-containing wastewater.Photocatalysis is an attractive technological strategy with the inexpensive and highly effective advantages.In this paper,hollow BiOBr nanorods(hBOB)were prepared for the efficient photocatalytic degradation of ciprofloxacin(CIP)using Bi-MOF(CAU-17)as a template.Compared with BiOBr nanosheets(sBOB),hBOB have larger specific surface area and higher charge separation efficiency.The degradation efficiency under simulated sunlight for 30 min reached 92.5%,and the degradation rate constant was 2.5 times higher than that of sBOB.The enhanced photodegradation ability was analyzed by diffuse reflectance of solids(DRS),fluorescence(PL),photocurrent(I-t),and impedance(EIS)characterization.The results indicate that the presence of porous structure and nanosheet assembly shortens the diffusion distance of carriers and facilitates the separation and transfer of photogenerated carriers,and thus hBOB has a good ability to remove CIP.In addition,the mechanism of photocatalytic degradation of CIP was also investigated using Mott Schottky test(M-S)and electron spin resonance(ESR)characterization.

关 键 词：CAU-17 BiOBr 光催化 降解环丙沙星 

分 类 号：O644.11[理学—物理化学]