【题名】：A highly sensitive dopamine sensor based on a polyaniline/reduced graphene oxide/Nafion nanocomposite
【作者】：Li-Qing Xie，Yan-Hui Zhang，Fei Gao，Quan-An Wu，Piao-Yang Xu，Shan-Shan Wang，Ning-Ning Gao，Qing-Xiang Wang
【关键词】：多巴胺 Graphene 氧化物 电气化学 Nafion POLYANILINE
【摘要】：A nanocomposite of polyaniline/reduced graphene oxide(PANI-r GO) was synthesized using a hydrothermal method. The product was characterized by FT-IR, Raman spectra, XRD, SEM and TEM.Then the hybrid material of PANI-r GO and Nafion(PANI-rGO-NF) was prepared and used to modify glassy carbon electrode for the trace determination of dopamine(DA) employing differential pulse voltammetry(DPV). It was found that the hybrid material showed good catalytic activity toward the oxidation of DA, and no response to ascorbic acid(AA) and uric acid(UA) was observed, suggesting a high selectivity of the sensor toward DA. The peak currents were linearly correlated with the concentration of DA in the range from 0.05 mmol/L to 60.0 mmol/L(R = 0.996) and 60.0 mmol/L to 180.0 mmol/L(R = 0.996) with a detection limit of 0.024 mmol/L(S/N = 3). The modified electrode also exhibited excellent repeatability and stability.
【资金项目】：financially supported by the national natural science foundation of china (nos. 21275127 and 21301143)；natural science foundation of fujian province (no. 2011j01059)；key provincial university project of fujian (no. jk2011032)
【作者单位】：College of Chemistry and Environment, Minnan Normal University；Fujian Provincial Key Laboratory of Modern Analytical Science and Separation Technology, Minnan Normal University