CeO_(2)@UiO-66光催化降解盐酸四环素  

Photocatalytic Degradation of Tetracycline Hydrochloride by CeO_(2)@UiO-66

作　　者：张琳 宫晓杰[1] 李丽华[1] ZHANG Lin;GONG Xiaojie;LI Lihua(School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《辽宁石油化工大学学报》2024年第5期8-14,共7页Journal of Liaoning Petrochemical University

基　　金：辽宁省教育厅高校科研基金项目(L2020039)。

摘　　要：盐酸四环素(TC)对环境的污染引起了广泛关注,通过光催化降解TC已经成为一种有效的方法。使用共沉淀法制备CeO_(2),溶剂热法合成CeO_(2)@UiO-66复合催化剂,对制备的催化剂分别采用FT-IR、XRD、SEM、EDS等手段进行表征,同时研究了CeO_(2)物质的量、催化剂质量浓度和H_(2)O_(2)质量分数对TC的光催化降解效果的影响。结果表明,成功地合成了CeO_(2)@UiO-66;当CeO_(2)物质的量为25 mmol、TC溶液质量浓度为20 mg/L、催化剂质量浓度为0.2 g/L、H_(2)O_(2)质量分数为2%时,CeO_(2)@UiO-66光催化效果最佳,在紫外灯照射70 min,TC降解率达到98%以上。通过自由基捕获实验可知,空穴和·OH是光催化过程中的主要贡献者。此外,经过6次循环,复合光催化剂对TC降解率仍能保持85%以上,表明其具有良好的稳定性。The environmental contamination caused by tetracycline hydrochloride(TC)has aroused widespread concern,photocatalytic degradation of TC has become an effective method.CeO_(2)was prepared by coprecipitation method,and solvothermal synthesis of CeO_(2)@UiO-66 composite catalysts.The prepared catalysts were characterized by FT-IR,XRD,SEM and EDS respectively,and the effects of the amount of CeO_(2),catalyst mass concentration and H_(2)O_(2)mass fraction on the photocatalytic degradation of TC were also investigated.The results showed that CeO_(2)@UiO-66 was successfully synthesized.When the amount of CeO_(2)substance is 25 mmol,the mass concentration of TC solution is 20 mg/L,the mass concentration of catalyst is 0.2 g/L,and the mass fraction of H_(2)O_(2)is 2%,CeO_(2)@UiO-66 photocatalytic effect is the best,and the TC degradation rate reaches over 98%when irradiated by UV lamp for 70 min.The free radical trapping experiments showed that holes and·OH were the main contributors in the photocatalytic process.In addition,after six cycles,the degradation rate of TC composite photocatalyst can still maintain above 85%,which indicates its good stability.

关 键 词：UiO-66 CeO_(2) 盐酸四环素 光催化 

分 类 号：TQ317[化学工程—高聚物工业]