碳纳米管/纳米TiO_2-聚苯胺复合膜电极的电化学制备及表征

Electrochemical Preparation and Characterization of Carbon Nanotube/nanocrystalline TiO_2-Polyaniline Complex Film Electrode

在含有0．2mol／L苯胺的0．5mol／LH2SO4溶液中，采用循环伏安法（CV），以扫描速度50mV／s，扫描电位-0．1～0．9V，在碳纳米管／纳米TiO2（CNT／nanoTiO2）膜电极上实现了苯胺的电化学聚合，用电化学阻抗谱（EIS）和CV法对制备的碳纳米管／纳米TiO2-聚苯胺（CNT／nanoTiO2-PAn）复合膜电极的电化学性质进行了表征，从扫描电镜对膜层的微观形貌观察发现，这种在纳米基体上聚合得到的聚苯胺膜层呈疏松、多孔的纳米纤维网状结构，同时具有良好的导电性，不同于在普通金属基体上聚合得到的颗粒状聚苯胺膜．

Polymerization of aniline on a carbon nanotube/nanocrystalline TiO2 （CNT/nanoTiO2 ） film electrode was achieved in 0.5 mol/L sulfuric acid including 0.2 mol/L aniline at scanning voltage -0.1 -0.9 V and a scanning rate of 50 mV/s, and electrochemical properties and struture of carbon nanotube/nanocrystalline TiO2-polyaniline （CNT/nanoTiO2-PAn） complex film were characterized by cyclic vohammetry, electrochemical impedance spectra （EIS） and SEM. The results show that the CNT/nanoTiO2- PAn complex film preparated has a loose, porous, nano-fibrous structure and a good electrical conductivity.