高等学校化学学报

高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (8): 1661.

• 研究论文 • 上一篇    下一篇

纳米银/聚多巴胺修饰玻碳电极的制备及电化学行为

苏碧泉1,2, 张玉珍1, 杜永令1, 王春明1   

  1. 1. 兰州大学化学化工学院, 兰州 730000;
    2. 兰州交通大学化学与生物工程学院, 兰州 730070
  • 收稿日期:2009-10-06 出版日期:2010-08-10 发布日期:2010-08-10
  • 通讯作者: 王春明, 男, 教授, 主要从事电分析化学研究. E-mail: wangcm@lzu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20577017, 20775030)资助.

Fabrication of a Silver Nanoparticle/polydopamine Modified Glassy Carbon Electrode and Its Electrocatalytic Reduction for p-Nitrophenol

SU Bi-Quan1,2, ZHANG Yu-Zhen1, DU Yong-Ling1, WANG Chun-Ming1*   

  1. 1. College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China;
    2. School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
  • Received:2009-10-06 Online:2010-08-10 Published:2010-08-10
  • Contact: WANG Chun-Ming. E-mail: wangcm@lzu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20577017, 20775030)资助.

PDF (PC)

被引次数

15

摘要： 利用电聚合法和脉冲沉积技术制备了纳米银/聚多巴胺修饰的玻碳电极. 通过循环伏安法和示差脉冲伏安法研究了该修饰电极上对硝基苯酚的电化学行为; 讨论了扫描速度和支持电解质等条件对对硝基苯酚在修饰电极上催化还原的影响. 结果表明, 对硝基苯酚的示差脉冲峰电流在4×10-5～3×10-4 mol/L范围内呈良好的线性关系.

关键词: 对硝基苯酚, 多巴胺, 纳米银, 化学修饰电极, 电催化还原

Abstract: A glassy carbon electrode modified with silver particles under polydopamine film was prepared successfully by means of electropolymerization and pulsed electrodeposition. A detailed analysis of the scanning electron microscope images reveals that silver deposit, obtained under pulsed electrodeposition conditions, appears as homogeneously compact and the crystallites are well dispersed on the overoxidized polydopamine substrate than that observed on the unmodified glassy carbon surfaces. The resulting silver nanoparticle/polydopamine modified glassy carbon electrode(Ag/PDA/GC) was electrochemically characterized through the reduction of p-nitrophenol(pNP). The potential needed for the reduction of the compound on the Ag/PDA/GC electrode is significantly less negative than that observed on the unmodified glassy carbon electrode substrates. A linear relationship between pNP concentration and current response was obtained in the range of 4×10-5—3×10-4 mol/L. The Ag/PDA/GC would be used in the practical application for detecting toxic nitrophenols.

Key words: p-Nitrophenol, Dopamine, Silver nanoparticle, Chemically modified electrode, Electrocatalytic reduction

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