High-performance,stable CoNi LDH@Ni foam composite membrane with innovative peroxymonosulfate activation for 2,4-dichlorophenol destruction  

作　　者：Yu Liu Weibao Liu Xinrui Gan Jiangwei Shang Xiuwen Cheng 

机构地区：[1]College of Chemistry and Environmental Science,Xinjiang Laboratory of Phase Transitions and Microstructures of Condensed Matter Physics,Yili Normal University,Yining 835000,China [2]Key Laboratory for Environmental Pollution Prediction and Control,Gansu Province,College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China

出　　处：《Journal of Environmental Sciences》2024年第7期235-248,共14页环境科学学报（英文版）

基　　金：supported by the Natural Science Foundation of Xinjiang Uygur Autonomous Region(No.2022D01C733);the Open Project of Key Disciplines of Physics(No.XJZDXKphy202309);the Research and Innovation Team Cultivation Program of Yili Normal University(No.CXZK2021004)。

摘　　要：In this study,the cobalt-nickel layered double hydroxides(CoNi LDH)were synthesized with a variety of Co/Ni mass ratio,as CoxNiyLDHs.In comparison,Co1Ni3LDH presented the best peroxymonosulfate(PMS)activation efficiency for 2,4-dichlorophenol removal.Meanwhile,CoNi LDH@Nickel foam(CoNi LDH@NF)composite membrane was constructed for enhancing the stability of catalytic performance.Herein,CoNi LDH@NF-PMS system exerted high degradation efficiency of 99.22%within 90 min for 2,4-DCP when[PMS]_(0)=0.4 g/L,Co^(1)Ni^(3)LDH@NF=2 cm×2 cm(0.2 g/L),reaction temperature=298 K.For the surface morphology and structure of the catalyst,it was demonstrated that the CoNi LDH@NF composite membrane possessed abundant cavity structure,good specific surface area and sufficient active sites.Importantly,·OH,SO_(4)·^(-)and^(1)O_(2)played the primary role in the CoNi LDH@NF-PMS system for 2,4-DCP decomposition,which revealed the PMS activation mechanism in CoNi LDH@NF-PMS system.Hence,this study eliminated the stability and adaptability of CoNi LDH@NF composite membrane,proposing a new theoretical basis of PMS heterogeneous catalysts selection.

关 键 词：CoNi LDH@NF composite membrane PEROXYMONOSULFATE 2 4-DICHLOROPHENOL Reactive radicals 

分 类 号：X703[环境科学与工程—环境工程]