Degradation of ofloxacin using peroxymonosulfate activated by nitrogen-rich graphitized carbon microspheres:Structure and performance controllable study  

作　　者：Changsheng Feng Chen Chen Yu Zhu Qi Cao Chao Chen Caiyun Jiang Yuping Wang 

机构地区：[1]School of Chemistry and Material Science,Jiangsu Provincial Key Laboratory of Materials cycling and Pollution Control,Nanjing Normal University,Nanjing 210046,China [2]Department of Engineering and Technology,Jiangsu lnstitute of Commerce,Nanjing 211168,China

出　　处：《Journal of Environmental Sciences》2021年第1期10-20,共11页环境科学学报（英文版）

基　　金：the National Natural Science Foundation of China(No.51578295);the National Natural Science Foundation of Jiangsu Province(No.BK20161479);Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse(Nanjing University of Science and Technology);Qinglan Project of Jiangsu Province supported this study;Foundation of Jiangsu Collaborative Innovation Center of Biomedical Functional Materials;a project funded by the priority academic program development of Jiangsu Higher Education Institutions。

摘　　要：Nitrogen-rich graphitized carbon microspheres(NGCs)with hierarchically porous were constructed by self-assembly.Under different heat treatment conditions,the structure,morphology and properties of NGCs were studied by using multiple characterization techniques.The results showed that the chemical microenvironments(e.g.surface chemistry,degree of graphitization and defective,etc.)and microstructures properties(e.g.morphology,specific surface area,particle size,etc.)could be delicately controlled via thermal carbonization processes.The degradation of ofloxacin(OFLX)by NGCs activated peroxymonosulfate(PMS)was studied systematically.It was found that the synergistic coupling effect between optimum N or O bonding species configuration ratio(graphitic N and C=O)and special microstructure was the main reason for the enhanced catalytic activity of NGC-800(calcination temperature at 800°C).Electron paramagnetic resonance(EPR)experiments and radical quenching experiments indicated that the hydroxyl(·OH),sulfate(SO4^·-)and singlet oxygen(^1O_(2))were contributors in the NGC-800/PMS systems.Further investigation of the durability of chemical structures and surface active sites revealed that undergo N bonding species configuration reconstruction and cannibalistic oxidation during PMS activation reaction.The used NGC-800 physicochemical properties could be recovered by heat treatment to achieve the ideal catalytic performance.The findings proposed a valuable insight for catalytic performance and controllable design of construction.

关 键 词：PEROXYMONOSULFATE Ofloxacin degradation Carbonization temperature Carbocatalyst 

分 类 号：X703[环境科学与工程—环境工程]