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The novel sulfonated polyaniline−decorated carbon nanospheres nanocomposites explored for electrochemical sensing of dopamine

Abstract

A novel dopamine(DA) electrochemical sesnor was developed by combing the carbon nanospheres (CNSs) and sulfonated polyaniline(SPANI) with their own excellent characteristics. The sensing materials of SPANI/CNSs were prepared through a green and economical approach under hydrothermal treatment and in-situ chemical oxidative polymerization and sulfonation. Scanning electron microscopy and Fourier transform infrared spectroscopy were employed to character the morphology and composition of the nanocomposites. And electrochemical activities of the sensor were investigated by cyclic voltammetry, differential pulse voltammetry and amperometry. The investigation for the sensor indicated that it had excellent properties towards DA oxidation, with a linear range of 0.50 M to 1.78 mM, a detection limit of 0.0152 M (S/N=3) and a sensitivity of 113.9 A mM−1 cm−2. Meanwhile, the sensor exhibited intriguing anti-interference to co-existing substances such as ascorbic acid (AA), uric acid(UA) and glucose (Glu). These electrochemical results could be attributed to the enhanced electron transfer rates and abundant functional groups with negative charges possessed by the nanocomposites. Therefore, SPANI/CNSs nanocomposites showed great application potential for constructing DA sensor.

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Publication details

The article was received on 18 Aug 2017, accepted on 08 Nov 2017 and first published on 09 Nov 2017


Article type: Paper
DOI: 10.1039/C7NJ03086J
Citation: New J. Chem., 2017, Accepted Manuscript
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    The novel sulfonated polyaniline−decorated carbon nanospheres nanocomposites explored for electrochemical sensing of dopamine

    Y. Fu, Q. Sheng and J. Zheng, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ03086J

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