Catalytic degradation of organic pollutants for water remediation over Ag nanoparticles immobilized on amine-functionalized metalorganic frameworks  

作　　者：Wen-Zhe Xiao Ling-Ping Xiao Yue-Qin Yang Shang-Ru Zhai Run-Cang Sun 

机构地区：[1]Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials,Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery,College of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian 116034,China

出　　处：《Nano Research》2022年第9期7887-7895,共9页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(No.51961125207);Dalian Support Plan for Innovation of High-level Talents(Nos.2019RQ034 and 2019RD13);Liaoning Revitalization Talents Program(Nos.XLYC2007104 and XLYC1901004);Opening Project of Guangxi Key Laboratory of Clean Pulp&Papermaking and Pollution Control(No.2019KF14);Liaoning Baiqianwan Talents Program(No.2021921087).

摘　　要：Developing efficient catalysts for organic pollutants degradation is crucial for remediating the current severe water environment,yet remains a great challenge.Herein,we report silver nanoparticles immobilized on an amine-functionalized metal-organic framework(MOFs)(Ag/UiO-66-NH_(2))as a robust catalyst for the reduction of 4-nitrophenol(4-NP).The fabricated Ag/UiO-66-NH_(2)catalyst exhibits the merits of superior activities(high turnover frequency(TOF)3.2×10^(4)h^(-1)and k value 6.9×10^(-2)s^(-1)),costeffectiveness under the lowest NaBH4 concentration(n[NaBH_(4)]/n[4-NP],200),outstanding cyclability(10 recycling runs),and observable long-term durability,significantly outperforming previously reported catalytic system.The excellent degradation efficiency is ascribed to the favorable microenvironment modulation of unique MOF structure,which regulates the intrinsic properties of active sites and improves the electron-transfer process.Notably,the Ag/UiO-66-NH_(2)also promotes the catalytic degradation of several organic pollutants at room temperature and hence could find a broad application for water remediation.This work offers a new avenue for the development of high-performance MOF-based catalysts with excellent activity and durability.

关 键 词：Ag/UiO-66-NH_(2) catalytic degradation organic pollutants 4-NITROPHENOL water remediation 

分 类 号：O64[理学—物理化学]