Coupling N-doping and confined Co_(3)O_(4) on carbon nanotubes by polydopamine coating strategy for pleiotropic water purification  

作　　者：Wen-Long Tu Gang Wang Yue Zhang Hong-Yang Zhu Rong-Rong Du Hong-Yao Zhao Sheng Tang Zeng-Jing Guo Jun Yang Fu Yang Cheng-Zhang Zhu 

机构地区：[1]School of Environmental and Chemical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China [2]School of Chemistry and Chemical Engineering,Liaocheng University,Liaocheng 252000,China [3]School of Material Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China [4]School of Environmental Science and Engineering,Nanjing Tech University,Nanjing 211816,China

出　　处：《Rare Metals》2024年第7期3146-3160,共15页稀有金属（英文版）

基　　金：financially supported by the China National Natural Science Foundation(No.201808085);the National Key Research and Development Program of China(No.2022YFB3504100);Jiangsu Provincial Founds for Young Scholars(No.BK20190961);the Natural Science Foundation of Jiangsu Higher Education Institutions of China(No.22KJB610012);the International Cooperation Foundation for the Chunhui Plan Program of Ministry of Education of China(No.HZKY20220136)。

摘　　要：The development of effective and sustainable solutions for pleiotropic water purification becomes urgent and attractive.Heterogeneous Fenton-like catalysts for activation of peroxymonosulfate(PMS)to purify organic wastewater show great promise.In this work,by tuning metal loading with an in-situ polydopamine coating strategy,oxygen vacancy-enriched Co_(3)O_(4) loading on N-doped carbon nanotubes(CNTs)were constructed to enhance PMS activation efficiency for pollutants degradation.Impressively,the obtained modified CNTs afford a well-developed N-containing network structure,which is further endowed with abundant Co(Ⅱ)/Co(Ⅲ)redox cycles and significant metal-carbon interactions.In particular,the surface N doping in CNTs might induce the oriented enrichment of pollutants around the catalyst,which reduces the migration distance and correspondingly improves the utilization of reactive oxidative species.The electron transfer efficiency of the catalyst can be further improved by incorporating oxygen vacancy-enriched Co_(3)O_(4).The performance results show that the optimal NC/Co-1 could mineralize 20×10^(-6)of bisphenol A(BPA)by almost 98%in 8 min.A low reaction activation energy(26.05 kJ·mol^(-1))in BPA degradation was demonstrated by the NC/Co-1.More importantly,NC/Co-1 can inherit excellent degradation performance towards oxytetracycline,2,4-dichlorophenol,and tetracycline,showing wide practical flexibility.In addition,by virtue of the photothermal conversion property,NC/Co-1 achieves an additive function for interfacial solar water evaporation(1.84 kg·m^(-2)·h^(-1),112.51%),showing impressive potential for clean water recovery under complicated environmental pollution conditions.

关 键 词：Carbon nanotube Advanced oxidation process Co_(3)O_(4) Photothermal conversion Solar water evaporation 

分 类 号：X703[环境科学与工程—环境工程] TQ426[化学工程]