Abstract
Polyaniline (PANI)/Au composite nanotubes were synthesized and developed as an electrode material for a nicotinamide adenine dinucleotide (NADH) sensor. A MnO2 self-degradable template method was used to prepare the tube-like PANI nanomaterial. By introducing PANI nanotubes into Au colloid, Au nanoparticles (NPs) were successfully decorated onto the surface of PANI nanotubes through electrostatic effects. The morphology, composition, and optical properties of the resulting products were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, ultraviolet-visible (UV-vis) absorption spectra, and thermogravimetric analysis (TGA). In addition, the obtained PANI/Au composites were used as catalysts for the electrochemical oxidation of NADH. Cyclic voltammogram (CV) experiments indicated that PANI/Au-modified glassy carbon electrode showed a higher electrocatalytic activity towards the oxidation of NADH in a neutral environment. Differential pulse voltammogram (DPV) results illustrated that the fabricated NADH sensor had excellent anti-interference ability and displayed a wide linear range from 4 × 10−4 to 8 × 10−3 M with a detection limit of 0.5 × 10−7 M.
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Acknowledgment
This work is supported by the National Natural Science Foundation of China (nos. 20905038, 20903057, 21105050, and 21005040), National Basic Research Program of China (nos. 2009CB930600, 2012CB933301), Research Fund for the Doctoral Program of Higher Education of China (20113223120004), and the Ministry of Education of China (no. IRT1148).
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Xiaomiao Feng and Yu Zhang contributed to this work equally.
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Feng, X., Zhang, Y., Yan, Z. et al. Synthesis of polyaniline/Au composite nanotubes and their high performance in the detection of NADH. J Solid State Electrochem 18, 1717–1723 (2014). https://doi.org/10.1007/s10008-014-2407-1
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DOI: https://doi.org/10.1007/s10008-014-2407-1