One-pot fabrication of uniform polypyrrole/Au nanocomposites and investigation for gas sensing

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• 作者：Jun Zhang ; Xianghong Liu ; Shihua Wu ; Hongyan Xu ; Bingqiang Cao
• 关键词：Conducting polymers ; Polypyrrole ; Nanocomposites ; Au nanoparticles ; Gas sensor
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2013
• 出版时间：September, 2013
• 年：2013
• 卷：186
• 期：Complete
• 页码：695-700
• 全文大小：2020 K

文摘

A facile one-pot strategy is developed to fabricate polypyrrole (PPy)/Au nanocomposites, in which Au nanoparticles with an average size of ca. 4.2 nm are uniformly dispersed on PPy. The morphology, structure, and composition of the products were characterized by transmission electronic microscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy and thermogravimetric analysis. Lysine plays a crucial role in the formation of uniform PPy/Au nanocomposites. Importantly, the PPy/Au nanocomposites have demonstrated great potential for detecting ammonia gas at room temperature, showing enhanced sensor performances in comparison to pure PPy as a result of the funtionalization of Au nanoparticles on PPy. The possible sensing mechanism is also discussed.