FeMo@porous carbon derived from MIL-53(Fe)@MoO_(3) as excellent heterogeneous electro-Fenton catalyst: Co-catalysis of Mo  

作　　者：Xuedong Du Wenyang Fu Pei Su Qizhan Zhang Minghua Zhou 

机构地区：[1]Key Laboratory of Pollution Process and Environmental Criteria,Ministry of Education,College of Environmental Science and Engineering,Nankai University,Tianjin 300350,China [2]Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution,Nankai University,Tianjin 300350,China [3]Tianjin Advanced Water Treatment Technology International Joint Research Center,College of Environmental Science and Engineering,Nankai University,Tianjin 300350,China

出　　处：《Journal of Environmental Sciences》2023年第5期652-666,共15页环境科学学报（英文版）

基　　金：supported by National Key R&D Program International Cooperation Project(No.2021YFE0106500);Natural Science Foundation of China(Nos.52170085 and 21976096);Tianjin Development Program for Innovation and Entrepreneurship,Key Project of Natural Science Foundation of Tianjin(No.21JCZDJC00320);Tianjin Post-graduate Students Research and Innovation Project(No.2019YJSB075);Fundamental Research Funds for the Central Universities,Nankai University(No.63221313).

摘　　要：An ultra-efficient electro-Fenton catalyst with porous carbon coated Fe-Mo metal(FeMo@PC),was prepared by calcining MIL-53(Fe)@MoO_(3).This FeMo@PC-2 exhibited impressive catalytic performance for sulfamethazine(SMT)degradation with a high turnover frequency value(7.89 L/(g·min)),much better than most of reported catalysts.The mineralization current efficiency and electric energy consumption were 83.2%and 0.03 kWh/gTOC,respectively,at lowcurrent(5mA)and small dosage of catalyst(25.0mg/L).The removal rate of heterogeneous electro-Fenton(Hetero-EF)process catalyzed by FeMo@PC-2 was 4.58 times that of Fe@PC/Hetero-EF process.Because the internal-micro-electrolysis occurred between PC and Fe0,while the co-catalysis of Mo accelerated the rate-limiting step of the Fe^(3+)/Fe^(2+) cycle and greatly improved the H_(2)O_(2)utilization efficiency.The results of radical scavenger experiments and electron paramagnetic resonance confirmed the main role of surface-bound hydroxyl radical oxidation.This process was feasible to remove diverse organic contaminants such as phenol,2,4-dichlorophenoxyacetic acid,carbamazepine and SMT.This paper enlightened the importance of the doped Mo,which could greatly improve the activity of the iron-carbon heterogeneous catalyst derived from metal-organic frameworks in EF process for efficient removal of organic contaminants.

关 键 词：Metal-organic frameworks derivatives Fe-Mo bimetal Porous carbon CO-CATALYSIS Heterogeneous electro-Fenton 

分 类 号：X703[环境科学与工程—环境工程] TQ426[化学工程]