Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 703, Issue -, Pages 45-51Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2013.04.020
Keywords
Dopamine; Copper oxide; Multi-wall carbon nanotubes; Voltammetry
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Funding
- National Natural Science Foundation of China [20472076]
- Natural Science Foundation of Henan Province in China [0512001400]
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A novel nano-sized copper oxide/multi-wall carbon nanotubes/Nafion (CuO/MWNTs/Nafion) composite film-modified electrode was fabricated, and applied for a sensitive and selective determination of dopamine. The morphology and structure of the as-prepared CuO/MWNTs nanocomposite were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive spectrometer (EDS). The excellent electrocatalytic activity of the CuO/MWNTs/Nafion nanocomposite for the oxidation of dopamine was studied by voltammetry. Dopamine can effectively accumulate at CuO/MWNTs/Nafion composite film-modified electrode and produce a pair of sensitive redox peaks in 0.1 mol L-1 phosphate buffer solution (PBS) (pH 6.0). This newly exploited electrochemical sensor was successfully used to determine dopamine in real sample. (C) 2013 Elsevier B.V. All rights reserved.
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