摘要
β-lactam antibiotics in aquatic environment have severely damaged ecological stability and caused a series of environmental pollution problems to be solved urgently.Herein,a novel composite photocatalyst prepared by loading carbon dots(CDs)onto rod-like CoFe_(2)O_(4)(CFO),which can effectively degrade amoxicillin(AMX)by photocata lytic/peroxy mono sulfate(PMS)activation under visible light irradiation.The degradation results exhibits that the optimal degradation efficiency with 97.5%within 80 min is achievd by the CDs-CFO-5 composite.Such enhanced activity is ascribed to the introduction of CDs that effectively improves the separation efficiency of photogenerated electron pairs and creates new active sites as electron bridges that improve the photocata lytic performance.More importantly,a strong synergistic between CDs and photo-induced electrons generated from CFO can further activiate PMS to provide more SO4-·and·OH radicals for boosting the degradation ability towards AMX.The present study aims to elucidate positive role of CDs in photocata lytic/peroxy monosulfate activation during the degradation reaction.
基金
founding support from the National Natural Science Foundation of China(Nos.21906072,22006057 and 31971616)
the Natural Science Foundation of Jiangsu Province(BK20190982)
“Doctor of Mass Entrepreneurship and Innovation”Project in Jiangsu Province,Henan Postdoctoral Foundation(202003013)
Doctoral Scientific Research Foundation of Jiangsu University of Science and Technology(China)(1062931806 and 1142931803)
the Science and Technology Research Project of the Department of Education of Jilin Province(JJKH20200039KJ)
the Science and Technology Research Project of Jilin City(20190104120,201830811)
the Project of Jilin Provincial Science and Technology Development Plan(20190201277JC,20200301046RQ,YDZJ202101ZYTS070)。
