物理化学学报 >> 2008, Vol. 24 >> Issue (04): 612-618.doi: 10.3866/PKU.WHXB20080412

研究论文 上一篇    下一篇

不同电解质溶液对聚吡咯修饰膜性质的影响

田颖; 李浙齐; 徐洪峰; 吴艳波; 杨凤林   

  1. 大连交通大学环境与化学工程学院, 辽宁 大连 116028; 大连理工大学环境科学与工程系, 辽宁 大连 116024
  • 收稿日期:2007-11-28 修回日期:2008-01-25 发布日期:2008-04-07
  • 通讯作者: 田颖 E-mail:greenhusk@126.com

Effects of Different Electrolyte Solutions on Characteristics of Polypyrrole-Modified Films

TIAN Ying; LI Zhe-Qi; XU Hong-Feng; WU Yan-Bo; YANG Feng-Lin   

  1. College of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, Liaoning Province, P. R. China; Department of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning Province, P. R. China
  • Received:2007-11-28 Revised:2008-01-25 Published:2008-04-07
  • Contact: TIAN Ying E-mail:greenhusk@126.com

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摘要： 以对甲基苯磺酸钠(p-TSNa)为掺杂剂在不锈钢电极表面恒电位合成聚吡咯(PPy)修饰膜, 采用循环伏安法在-1.6 - 0.8 V大范围扫描研究了修饰膜在H2SO4、Na2SO4、NaOH电解质溶液中的氧化还原行为. 结果表明, 在H2SO4溶液中, 以H+的脱出(氧化)/嵌入(还原)为特征, 并发现聚吡咯在酸性溶液中所特有的质子还原峰. 在Na2SO4和NaOH溶液中, 以Na+的脱出(氧化)/嵌入(还原)峰为特征. FT-IR吸收光谱显示, 经NaOH处理后, 聚吡咯膜的长共轭结构被完全破坏, 而经H2SO4和Na2SO4处后, 膜的共轭结构未发生变化.

关键词: 聚吡咯, 氧化还原行为, 电解质溶液, FT-IR

Abstract: Polypyrrole (PPy) films were synthesized by potentiolstatic method froma para-toluenesulfonic sodium (p-TSNa) solution on stainless steel. Cyclic voltammetry of PPy-modified electrodes in the wide potential range from -1.6 to 0.8 V was conducted in H2SO4, Na2SO4, and NaOH solutions, respectively. The results showed that cyclic voltammogramin H2SO4 solution was featured by H+ insertion during reduction process and H+ expulsion during oxidation process. A unique peak associated to H+ reduction was first discovered. In Na2SO4 and NaOH solutions, cyclic voltammograms are featured by Na+ insertion during reduction process and Na+ expulsion during oxidation process. The data of FT-IR absorption spectra demonstrated that NaOH treatment had made extensive structure degradation, but Na2SO4 and H2SO4 treatments had not made conjugated structure changes on PPy films.

Key words: Polypyrrole, Redox behavior, Electrolyte solutions, FT-IR

MSC2000: 

  • O646