Abstract
With sulfonated electrospun polystyrene fiber as a template, uniform polyaniline(PANI) nanotubes were fabricated via polymerization of aniline followed by template removal. Au nanoparticles(Aunano) were decorated on the PANI nanotube successfully via auto-reduction of HAuCl4 on the PANI nanotube. The morphology of the nanotubes was characterized by means of scanning electron microscopy(SEM) and transmittance electron microscopy(TEM). By varying precursor concentration and incubation time, Aunano-PANI with different size of Aunano was obtained conveniently. Glassy carbon electrode modified with the Aunano decorated PANI nanotubes (Aunano-PANI/GCE) was prepared and used seccessfully for the catalytic oxidation of ascorbic acid(AA). The results of differential pulse voltammetry indicate that there is a good linear relationship between the peak currents and the concentrations of AA in the range of 5―3000 μmol/L, with the limit of detection of 1 μmol/L(S/N>3). There is no mutual interference between AA and dopamine. The electrode has been successfully applied in the detection of AA in vitamin C tablet sample.
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Supported by the National Natural Science Foundation of China(Nos.21105009 and 21476047) and the Project of the State Key Laboratory of Electroanalytical Chemistry, China(No.SKLEAC201205).
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Ma, X., Yang, J., Cai, W. et al. Preparation of Au nanoparticles decorated polyaniline nanotube and its catalytic oxidation to ascorbic acid. Chem. Res. Chin. Univ. 32, 702–708 (2016). https://doi.org/10.1007/s40242-016-5460-8
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DOI: https://doi.org/10.1007/s40242-016-5460-8