Preparation of Polyaniline/Au0 Nanocomposites Modified Electrode and Application for Hydrazine Detection |
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| Authors: | Meng Xin Hailian Lin Jianmao Yang Mengni Chen Xiaoyu Ma Jianyun Liu |
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| Institution: | 1. College of Environmental Science and Engineering, Donghua University, Shanghai 201620, P.R. China;2. Research Center for Analysis & Measurement, Donghua University, Shanghai 201620, P.R. China |
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| Abstract: | The PANI/Au0 nanocomposite films were successfully prepared on glassy carbon electrode (GCE) using a simple alternate adsorption of water soluble polyaniline (PANI) and  . The growth of the films was monitored by UV? Vis spectroscopy and cyclic voltammetry.  was in‐situ reduced in the film due to the redox interaction between PANI and  , without extra reductant. The ultrafine Au nanoparticles with the size of 2–4 nm were observed by transmission electron spectroscopy. The existence of zero‐valence Au nanocrystals (Au0) was confirmed by X‐ray photoelectron spectroscopy, X‐ray Diffraction and FTIR. PANI in the nano‐structured PANI/Au0 composite films displayed a good redox activity in neutral pH solution. The as‐obtained PANI/Au0/GCE presents an excellent electrocatalytic activity to hydrazine oxidation, and the mechanism of hydrazine oxidation was studied. The calibration curve on (PANI/Au0)5/GCE was obtained in the concentration range of 0.01–6 mM with the detection limit of 1 µM (S/N>3). The modified electrode has a great potential for hydrazine sensor application due to its ease of fabrication, good reproducibility and high stability. |
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| Keywords: | Polyaniline/Au0 nanocomposites Self‐assembly Ultrafine Au nanocrystal Hydrazine oxidation |
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