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.
- Key words：ZIF-67 Fe@Co/NC/GF electro-Fenton EDTA-Ni
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