Bi_(2)O_(3)/CaFe_(2)O_(4)Z型异质结材料光催化降解氧氟沙星  

BI_(2)O_(3)/CAFE_(2)O_(4)Z-SCHEME HETEROJUNCTION MATERIAL FOR PHOTOCATALYTIC DEGRADATION OF OFLOXACIN

作　　者：叶红勇[1,2] 杜佳 杨培渊 王明辉 左广玲 YE Hong-yong;DU Jia;YANG Pei-yuan;WANG Ming-hui;ZUO Guang-ling(School of Biological and Chemical Engineering,Nanyang Institute of Technology,Nanyang 473000,China;Henan Key Laboratory of Industrial Microbial Resources and Fermentation Technology,Nanyang 473000,China)

机构地区：[1]南阳理工学院生物与化学工程学院,河南南阳473000 [2]河南省工业微生物资源与发酵利用重点实验室,河南南阳473000

出　　处：《南阳理工学院学报》2024年第4期114-119,共6页Journal of Nanyang Institute of Technology

基　　金：国家自然科学基金项目(22201146)。

摘　　要：利用溶剂热法合成了Z型异质结Bi_(2)O_(3)/CaFe_(2)O_(4)复合催化剂。采用多种表征手段对其晶体结构、形貌和性能进行了表征,并以氧氟沙星(OFX)为降解对象考察了Bi_(2)O_(3)/CaFe_(2)O_(4)复合催化剂的光催化活性。结果表明:Bi_(2)O_(3)负载在CaFe_(2)O_(4)表面,构建了Z型异质结构,这种结构能加速无效光生载流子的复合,促进有效光生载流子的分离,提升Bi_(2)O_(3)/CaFe_(2)O_(4)复合催化剂的可见光催化活性;Bi_(2)O_(3)/CaFe_(2)O_(4)复合催化剂对OFX的降解效果明显优于纯Bi_(2)O_(3)和CaFe_(2)O_(4)。在Bi_(2)O_(3)负载量为5%时,Bi_(2)O_(3)/CaFe_(2)O_(4)对OFX的降解效果最好,降解率可达78.7%,经过4次循环,依然可达到62.5%,说明其理化性能稳定,能够长期稳定循环使用。Z-type heterojunction Bi_(2)O_(3)/CaFe_(2)O_(4) composite catalyst was synthesized through solvothermal method.This composite catalyst was extensively characterized by various methods,including structure,morphology and properties.The photocatalytic activity of Bi_(2)O_(3)/CaFe_(2)O_(4) composite catalyst was tested with ofloxacin(OFX)as the degradation target.The results indicated that Bi_(2)O_(3) is loaded on the surface of CaFe_(2)O_(4) to form a Z-type heterojunction structure,which accelerates the recombination of ineffective photogenerated carriers,promotes the separation of effective photogenerated carriers,and significantly enhances the visible light catalytic activity of the Bi_(2)O_(3)/CaFe_(2)O_(4) composite catalyst.In comparison to pure Bi_(2)O_(3) and CaFe_(2)O_(4),Bi_(2)O_(3)/CaFe_(2)O_(4) composite catalyst exhibited a better degradation effect on OFX.Notably,when the Bi_(2)O_(3) load is 5%,Bi_(2)O_(3)/CaFe_(2)O_(4) exhibited the best degradation effect on OFX,with a degradation rate of up to 18.7%.After four cycles,this rate still remained at 62.5%,indicating that its physical and chemical properties are stable and can be used stably for a long time.

关 键 词：Ag_(3)PO_(4) CaFe_(2)O_(4) 光催化 氧氟沙星 

分 类 号：X50[环境科学与工程—环境工程] O644.1[理学—物理化学]