高等学校化学学报 ›› 2024, Vol. 45 ›› Issue (2): 20230382.doi: 10.7503/cjcu20230382

• 物理化学 • 上一篇    下一篇

非贵金属催化电极Ni/C@CF的制备及绿色类Fenton性能

成施雨1,2, 杨灵1,2, 包芮于1,2, 陈宸1,2, 崔萌萌1,2, 张谷令3, 李华1,2()   

  1. 1.中央民族大学民族地区生态环境国家民委重点实验室
    2.生命与环境科学学院
    3.理学院, 北京 100081
  • 收稿日期:2023-08-28 出版日期:2024-02-10 发布日期:2023-12-19
  • 通讯作者: 李华 E-mail:lihua@muc.edu.cn
  • 基金资助:
    国家民委民族地区生态与环境重点实验室开放课题(KLEEMA202303)

Preparation of Non-noble Metal Catalytic Electrode Ni/C@CF and Its Green Fenton Performance

CHENG Shiyu1,2, YANG Ling1,2, BAO Ruiyu1,2, CHEN Chen1,2, CUI Mengmeng1,2, ZHANG Guling3, LI Hua1,2()   

  1. 1.Key Laboratory of Ecology and Environment in Minority Areas,National Ethnic Affairs Commission
    2.College of Life and Environmental Sciences
    3.College of Science,Minzu University of China,Beijing 100081,China
  • Received:2023-08-28 Online:2024-02-10 Published:2023-12-19
  • Contact: LI Hua E-mail:lihua@muc.edu.cn
  • Supported by:
    the Open Project of the Key Laboratory of Ecology and Environment in Minority Areas, National Ethnic Affairs Commission, China(KLEEMA202303)

摘要:

传统芬顿(Fenton)法利用Fe2+催化H2O2产生具有强氧化性的羟基自由基(OH), 可以高效氧化降解水中有机污染物, 但其操作pH范围窄(pH≈3)和易产生铁絮凝沉淀的缺点限制了其应用发展. 原子氢H*作为一种单电子供体, 可以将电子快速转移到H2O2中, 生成OH, 适用于广泛的pH值, 没有铁污泥产生, 是一种新型高效绿色芬顿法. 然而, 原子H*更易相互结合形成H2, 极不稳定, 因此, 探索合适的电催化剂对H*绿色Fenton的应用起着至关重要的作用. 本文以炭黑作为载体, 通过液相还原法制备了具有催化活性高、 性能稳定的Ni/C@碳毡(Ni/C@CF)非贵金属电催化材料, 制备的Ni纳米粒子均匀分散在炭黑上. 以此电极材料为阴极, 构建绿色Fenton催化体系, 能够催化H2O和H+生成H*, 进而催化H2O2产生OH, 高效降解去除水中抗生素污染物. 通过调节制备方法、 电压、 溶液pH值及外加氧化剂量, 确定了该体系下的最佳反应条件.

关键词: 芬顿反应, 原子氢, Ni/C@CF材料, 电催化, 有机污染物

Abstract:

The traditional Fenton process uses Fe2+ to catalyze H2O2 to produce strong oxidizing hydroxyl radical(OH), which can efficiently oxidize and degrade organic matter. However, its operating pH range is narrow(pH: ca. 3), the production of iron flocculation precipitation and other shortcomings limit its application and development. Atomic hydrogen H*, as a single electron donor, can quickly transfer electrons to H2O2 to generate OH, which is suitable for a wide range of pH values and does not produce iron sludge, and is an efficient green Fenton method. However, H* atoms are more likely to combine with each other to form H2, which is extremely unstable. Therefore, exploring suitable electrocatalysts plays a crucial role in the application of H* green Fenton. In this paper, Ni/C@CF electrocatalytic material with high catalytic activity and stable performance was successfully prepared by liquid phase reduction method using carbon black as the carrier. The prepared Ni nanoparticles were uniformly dispersed on carbon black. Using this electrode material as the cathode, a green Fenton catalytic system is constructed, which can catalyze water molecules(H2O) and hydrogen ions(H3O+) to produce H*, so that it can catalyze the decomposition of H2O2 to produce OH, thus achieving the effect of degrading antibiotic pollutants. By adjusting the preparation method such as voltage, pH value of solution and the additional oxidation dose, the optimal reaction conditions of Ni/C catalyst degradation in this system were determined. In addition, Ni/C@CF composite material has good stability and can be recycled to realize rapid oxidation of green Fenton technology, which has many potential practical applications in wastewater treatment.

Key words: Fenton reaction, Atomic hydrogen, Ni/C@CF material, Electrocatalysis, Organic pollutant

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