Fe@Co/NC改性石墨毡在电芬顿体系降解EDTA-Ni的研究  

Degradation of EDTA-Ni wastewater by Fe@N-doped carbon-stabilized Co nanoparticles materials supported graphite felt in electro-Fenton system

作　　者：张君亚 陈元彩 胡勇有 ZHANG Junya;CHEN Yuancai;HU Yongyou(The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters,Ministry of Education,School of Environment and Energy,South China University of Technology,Guangzhou 510006)

机构地区：[1]华南理工大学环境与能源学院,工业聚集区污染控制与生态修复教育部重点实验室,广州510006

出　　处：《环境科学学报》2018年第11期4313-4320,共8页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.21677052); 广东省水利科技创新项目(No.2017-25); 广州市产学研协同创新重大专项(No.201604010043)

摘　　要：采用Fe掺杂MOF前驱体ZIF-67(Fe@ZIF-67)为模版,通过煅烧制备了掺杂铁元素的金属有机框架衍生物(Fe@Co/NC).同时,首次采用Fe@Co/NC复合材料改性的石墨毡(Fe@Co/NC/GF)为阴极和石墨毡(GF)为阳极构建了电芬顿体系,研究了复合电极对络合重金属EDTA-Ni的去除效果.结果表明,Co/Fe、N掺杂的碳基催化剂具有高含量的吡啶氮(2.42%)和石墨氮(3.23%),提供了大量催化活性位点(C—N、Co—N_x),从而有效改善了催化剂氧还原的性能.在pH为3,Na_2SO_4浓度为0.1 mol·L^(-1),应用电流为40 mA的最佳条件下,反应120 min后,Fe@Co/NC/GF电芬顿体系对EDTA-Ni的降解率达到了97.4%,且有效拓宽了pH的应用范围.In this study, iron doped metal-organic framework defivate （Fe@ Co/NC） was synthesized by calcining Fe@ ZIF-67 precursor. This was the first time for the catalyst prepared by supporting Fe@ Co/NC on graphite feh as the cathode and graphite felt as the anode to explore the degradation efficiency of EDTA-Ni in electro-Fenton （EF） system. The results indicated that as Co/Fe, N-incorporated carbon-based catalyst, Fe@ Co/NC with the large amount of pyr/dinic nitrogen （ 2.42% ） and graphitic nitrogen （ 3.23 % ） could provide abundant active sites （ C--N, Co--Nx ）, resulting in the improve of ORR electrocatalytic activity. In the best conditions of pH = 3, 0. 1 mol. L-I Na2 SO4 and 40 mA, the removal efficiency of EDTA-Ni reached 97.4% after 120 rain in the Fe@ Co/NC/GF-EF system. And it effectively broadened the application range of pH.

关 键 词：ZIF-67 Fe@Co/NC/GF 电芬顿体系 EDTA-Ni 

分 类 号：X703[环境科学与工程—环境工程]