掺杂磺酸聚苯胺/碳纳米管复合膜电极制备及其应用

上海交通大学学报（自然版） ›› 2016, Vol. 50 ›› Issue (02): 228-234.

掺杂磺酸聚苯胺/碳纳米管复合膜电极制备及其应用

孙晓文，杨鹏，张文光

(上海交通大学机械与动力工程学院，机械系统与振动国家重点实验室，上海 200240)

收稿日期:2015-01-08 出版日期:2016-02-29 发布日期:2016-02-29
基金资助:
国家自然科学基金项目（51175334）,上海交通大学医工（理）交叉学科基金项目（YG2013MS06, YG2014M

Synthesis of Sulfosalicylic Acid Doped Polyaniline/MultiWalled Carbon Nanotubes Composite Film Modified Electrode and Its Applications

SUN Xiaowen,YANG Peng,ZHANG Wenguang

(State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China)

Received:2015-01-08 Online:2016-02-29 Published:2016-02-29

摘要/Abstract

摘要： 摘要：采用共聚法制备了掺杂磺酸的聚苯胺/多壁碳纳米管复合薄膜，并用其对铂电极进行表面修饰而制备出复合膜电极；通过扫描电子显微镜和红外光谱仪对复合膜电极表面的形态和组分进行表征，并采用电化学方法对其导电性和电催化活性进行测试.结果表明：与聚苯胺电极相比，掺杂磺酸的聚苯胺/多壁碳纳米管复合膜电极的表面形态更均匀致密，导电性能显著提高，响应峰电流从145 μA增加到1.61 mA，表面电荷密度提高了12.1倍，且稳定性也相应提高；复合膜电极具有较高电催化活性，在草酸环境中对抗坏血酸(AA)的线性响应不受干扰，其线性相关系数为0.996 0，灵敏度为9.09 A/(mol·cm2)，氧化峰的电位差达到340 mV，能够明显区分其混合物.

关键词: 修饰电极, 聚苯胺, 多壁碳纳米管, 磺基水杨酸, 电催化活性

Abstract: Abstract： The sulfosalicylic acid (SSA) doped polyaniline/multiwalled carbon nanotubes (PANI/SSA/MWCNTs) composite film modified electrodes were synthesized by electropolymerization. The modified electrode was characterized utilizing the scanning electron microscope (SEM), fourier transform infrared spectroscopy (FTIR) and electrochemical techniques. The results showed that the morphology of the PANI/SSA/MWCNTs modified Pt electrode was more uniform and compact compared with the PANI Pt electrode. The conductive properties improved significantly and there was an increment in the current from 145 μA up to 1.61 mA. The charge injection capacity of the electrode increased by about 12.1 fold. The electrodes showed a high electrocatalytic activity and good linear current response of ascorbic acid (AA) with a sensitivity of 9.09 A/(mol·cm2) and a correlation coefficient of 0.996 0. In addition, this electrode could be used for selective determining AA in the presence of oxalic acid with a large peak separation of about 340 mV.

Key words: Key words： modified electrode, polyaniline (PANI), multiwalled carbon nanotubes (MWCNTs), sulfosalicylic acid (SSA), electrocatalysis

中图分类号:

O 646

孙晓文，杨鹏，张文光. 掺杂磺酸聚苯胺/碳纳米管复合膜电极制备及其应用[J]. 上海交通大学学报（自然版）, 2016, 50(02): 228-234.

SUN Xiaowen,YANG Peng,ZHANG Wenguang. Synthesis of Sulfosalicylic Acid Doped Polyaniline/MultiWalled Carbon Nanotubes Composite Film Modified Electrode and Its Applications [J]. Journal of Shanghai Jiaotong University, 2016, 50(02): 228-234.

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