AgBr@Ag_3PO_4的制备及其可见光催化降解盐酸莫西沙星的性能  

Preparation of AgBr@Ag_3PO_4 and Its Performance for Photocatalytic Degradation of Moxifloxacin Hydrochloride Under Visible-Light

作　　者：徐秀泉[1,2] 吴春笃[3,2] 

机构地区：[1]江苏大学药学院,江苏镇江212013 [2]江苏大学环境学院,江苏镇江212013 [3]扬州环境资源职业技术学院,江苏扬州225002

出　　处：《石油化工》2013年第4期445-450,共6页Petrochemical Technology

基　　金：国家自然科学基金项目(50778083);国家水体污染控制与治理科技重大专项(2008ZX07317-001);江苏大学博士创新基金项目(CX10B_023X)

摘　　要：以Ag3PO4为前体,采用超声辅助原位离子交换法制备了AgBr@Ag3PO4光催化剂,并利用XRD,SEM,UV-Vis等方法对其进行了表征。以盐酸莫西沙星(MX)模拟自然水体中的抗菌药物残留,考察了该催化剂在可见光下的光催化性能,探讨了溶液pH、催化剂用量、MX初始浓度及催化剂循环使用次数对AgBr@Ag3PO4光催化性能及降解动力学的影响。研究了AgBr@Ag3PO4在可见光下的光催化反应机理。实验结果表明,AgBr和Ag3PO4形成了简单的物理复合物;AgBr@Ag3PO4对MX具有很强的可见光催化降解活性;在溶液pH=11、MX初始浓度20μmol/L、ρ(AgBr@Ag3PO4)=1.0 g/L的条件下,MX在可见光下照射15 min后,降解率达到97.5%;催化机理研究表明,空穴和.OH是该光催化反应中主要的氧化性物质。A photocatalyst AgBr@Ag3PO4 was prepared by an ultrasonic-assisted in situ anion- exchange method with Ag3PO4 as the precursor and characterized by means of XRD, SEM and UV- Vis spectrophotometry. The photocatalytic activity of the prepared catalyst in the degradation of moxifloxacin hydrochloride（MX）, which was used as a simulated pollutant, under visible light was studied. The effects of the solution pH, initial MX concentration, and catalyst dosage and reusability on the catalyst activity and reaction kinetics were discussed. The results showed that AgBr and Ag3PO4 formed a simple physical complex substance AgBr@Ag3PO4 which could degrade MX efficiently under the visible light. The degradation rate of MX could reach 97.5% under the conditions of solution pH 11, MX initial concentration 20 pmol/L, AgBr@Ag3PO4 concentration 1.0 g/L and degradation time 15 min. Active oositive hole and · OH played the maior roles in the degradation process.

关 键 词：AgBr@Ag3PO4光催化剂 盐酸莫西沙星 可见光 光催化降解 

分 类 号：TQ426.8[化学工程]