研究报告

  • 张君亚,陈元彩,胡勇有.Fe@Co/NC改性石墨毡在电芬顿体系降解EDTA-Ni的研究[J].环境科学学报,2018,38(11):4313-4320

  • 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
  • 基金项目: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)
  • 作者
  • 单位
  • 张君亚
  • 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
  • 陈元彩
  • 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
  • 胡勇有
  • 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
  • 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—Nx),从而有效改善了催化剂氧还原的性能.在pH为3,Na2SO4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.
  • Abstract:In this study, iron doped metal-organic framework derivate (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 felt 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 pyridinic 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-1 Na2SO4 and 40 mA, the removal efficiency of EDTA-Ni reached 97.4% after 120 min in the Fe@Co/NC/GF-EF system. And it effectively broadened the application range of pH.

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