高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (06): 1312.doi: 10.3969/j.issn.0251-0790.2012.06.032

• 物理化学 • 上一篇    下一篇

聚苯胺纳米纤维修饰石墨箔电极的制备及电化学性能

桑晓光1, 曾繁武2, 刘晓霞1   

  1. 1. 东北大学化学系, 沈阳 110819;
    2. 中国科学院金属研究所, 沈阳材料科学国家(联合)实验室, 沈阳 110016
  • 收稿日期:2011-07-16 出版日期:2012-06-10 发布日期:2012-06-10
  • 通讯作者: 刘晓霞, 女, 博士, 教授, 博士生导师, 主要从事电化学研究. E-mail: xxliu@mail.neu.edu.cn E-mail:sangxiaoguang@mail.neu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 50973013)资助.

Preparation and Electrochemical Properties of Polyaniline Nanofiber Modified Graphite Foil

SANG Xiao-Guang1, ZENG Fan-Wu2, LIU Xiao-Xia1   

  1. 1. Department of Chemistry, Northeastern University, Shenyang 110819, China;
    2. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2011-07-16 Online:2012-06-10 Published:2012-06-10

摘要: 以石墨箔(GF)为工作电极, 采用循环伏安法(CV), 通过电化学聚合, 制备了聚苯胺(PANI)纳米纤维修饰GF电极(Nano-PANI/GF). 利用红外光谱(FTIR)研究了Nano-PANI/GF修饰电极上聚合物的组成, 利用扫描电镜(SEM)观测了Nano-PANI/GF修饰电极的表面形貌. 利用循环伏安法研究了Nano-PANI/GF修饰电极在0.1 mol/L磷酸盐缓冲溶液(pH=6.9)中的电化学活性, 发现Nano-PANI/GF修饰电极在中性溶液中有良好的电化学活性. Nano-PANI/GF修饰电极对抗坏血酸(AA)电化学氧化的催化作用结果表明, 在0.2 V(vs. SCE)电位下, 在浓度范围1.7~2.0×103 μmol/L内, 抗坏血酸的氧化电流与浓度呈良好线性关系, 线性方程式为y=0.00013x+0.0031. 修饰电极对抗坏血酸的最低检测限为1.7 μmol/L(S/N=3).

关键词: 聚苯胺纳米纤维, 石墨箔, 电化学催化, 抗坏血酸

Abstract: Polyaniline nanofiber(Nano-PANI) modified graphite foil(GF)(Nano-PANI/GF) was prepared by electrochemical polymerization of aniline on GF electrode. The polymer on the modified electrode Nano-PANI/GF was characterized by FTIR. The morphologies of the modified electrode were investigated by SEM. The Nano-PANI/GF electrode made through cyclic voltammetric scans in a solution of 0.1 mol/L aniline and 1.0 mol/L HCl showed good electroactivites in 0.1 mol/L phosphate buffer solution(pH=6.9). The electrocatalytic properties of the modified electrode toward ascorbic acid oxidation were studied through cyclic voltammetry and potentiometry. The current for ascorbic acid oxidation on the modified electrode at 0.2 V showed linear response to the concentration of ascorbic acid in the range of 1.7-2.0×103 μmol/L. The detection limit of ascorbic acid on the modified electrode is 1.7 μmol/L(S/N=3).

Key words: Polyaniline nanofiber, Graphite foil, Electrocatalysis, Ascorbic acid

中图分类号: 

TrendMD: