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In-situ decorated gold nanoparticles on polyaniline with enhanced electrocatalysis toward dopamine |
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| Authors: | Ai-Jun Wang Jiu-Ju Feng Yong-Fang Li Jun-Lan Xi Wen-Ju Dong |
| Affiliation: | 1. Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; Key Laboratory for Yellow and Huai Rivers Water, Ministry of Education; Environment and Pollution Control, Henan Key Laboratory for Environmental Pollution Control; School of Chemistry and Environmental Science, Henan Normal University, Xinxiang, Henan, 453007, China 2. College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, Henan, 453003, China |
| Abstract: | Gold nanoparticles were in-situ decorated on top of a polyaniline film (GNPs–PANI) via the direct electroreduction of the adsorbed AuCl 4 - ions on a glassy carbon electrode that previously was coated with PANI by electropolymerization. The GNPs–PANI composite and the performance of the resultant sensors were investigated in some detail. The sensor was applied to the oxidation of dopamine (DA) with improved catalytic activity. Its catalytic current showed wide linear response toward dopamine ranging from 3 to 115 μM, with a low detection limit of 0.8 μM (S/N=3). In addition, the sensor exhibits easy-operation, fast response to dopamine, as well as excellent reproducibility and stability. Gold nanoparticles decorated polyaniline (GNPs-PANI) was prepared via electrosynthesis. The GNPs-PANI composite showed good catalytic activity toward the oxidation of dopamine. |
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