Design of cobalt-based catalysts with the uniformly distributed coreshell structure for ultra-efficient activation of peroxymonosulfate for tetracycline degradation  

作　　者：Hongjie Qin Weijie Zhang Qiling Zheng Penghui Zhang Shouwei Zhang Xijin Xu 

机构地区：[1]School of Physics and Technology,University of Jinan,336 West Road of Nan Xinzhuang,Jinan,250022,Shandong,China

出　　处：《Journal of Materiomics》2023年第5期882-891,共10页无机材料学学报（英文）

基　　金：supported by the Joint Funds of the National Natural Science Foundation of China(U22A20140),the Independent Cultivation Program of Innovation Team of Ji'nan City(No.2019GXRC011),the Natural Science Foundation of Shandong Province(Grant No.ZR2021ME143,ZR2021MA073)and National Natural Science Foundation of China(Grant No.51908242)and.All the authors discussed the results and commented on the manuscript.

摘　　要：Catalysts that can rapidly degrade tetracycline(TC)in water without introducing secondary ion pollution have always been challenging.Herein,a cobalt-based catalyst(CoO_(x)@P-C)is prepared so that CoOx quantum particles(5e10 nm)are uniformly distributed on a linear substrate,and the outer layer is covered with a shell(P-C).The quantum particles of CoO_(x) provide many active sites for the reaction,which ensures the efficient degradation effect of the catalyst,and 30 mg/L TC can be completely degraded in only 5 min.The shell of the quantum particles'outer layer can effectively reduce ions'extravasation.The combination of the shell-like structure and the linear substrate greatly enhances the catalysis's stability and ensures that the catalyst is prepared into a film for practical application.The high catalytic activity of CoO_(x)@P-C is mainly due to the following factors:(1)Uniformly distributed ultra-small nanoparticles can provide many active sites.(2)The microenvironment formed by the core-shell structure enhances not only catalytic stability but also provides the driving force to improve the reaction rate.(3)The composite of CoO_(x) and P-C core-shell structure can accelerate electron transfer and generate many reactive oxygen species in a short time,which makes TC degrade extremely rapidly.

关 键 词：Cobalt quantum particles Peroxymonosulfate(PMS)activation Superoxide Core-shell structure TETRACYCLINE 

分 类 号：X703[环境科学与工程—环境工程] TQ12[化学工程—无机化工]