A peculiar cyclic voltammetric behavior of polyaniline in acetonitrile and its application in ammonia vapor sensor
作者： Ke Xu , Lihua Zhu , Aiqing Zhang , Guodong Jiang , Heqing Tang
DOI: 10.1016/J.JELECHEM.2007.05.016
关键词: Inorganic chemistry 、 Cyclic voltammetry 、 Acetonitrile 、 Chemistry 、 Redox 、 Conductive polymer 、 Polyaniline 、 Transition metal 、 Dielectric spectroscopy 、 Electrode 、 Analytical chemistry 、 Electrochemistry 、 General Chemical Engineering
摘要: Abstract A peculiar cyclic voltammetric behavior of polyaniline (PANI) film was observed in acetonitrile (ACN) solution. When the potential scanned a narrow window corresponding to first conventional redox pair for conversion between leucoemeraldine and emeraldine ACN solution, splitting anodic peak oxidation from voltammograms. low limit shifted negative enough, voltammograms PANI changed significantly, electrical properties also due treatment. These behaviors were tentatively suggested be associated with deep reduction, accompanied by structural changes chains dedoping. It further found that when treated pre-cycling windows limits more than −0.8 V, its sensitivity significantly increased toward ammonia vapor, being little affected humidity. This led successful fabrication concept sensor using pretreated reduction.
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