Journal
ELECTROCHIMICA ACTA
Volume 142, Issue -, Pages 336-342Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.07.126
Keywords
NiO; Graphene; Ascorbic acid; Electro-deposition; Differential pulse voltammetry
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Funding
- National Natural Science Foundation of China [21271127, 61171033]
- Nano Foundation of Science and Techniques Commission of Shanghai Municipality [12nm0504200]
- Leading Academic Discipline Project of Shanghai Municipal Education Commission [J50102]
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This paper demonstrated an electrochemical sensor based on NiO nanoparticles-graphene composite film (NiO/GR) modified glassy carbon electrode for detecting ascorbic acid (AA) in the presence of folic acid using differential pulse voltammetry. The obtained NiO/GR nanocomposite was fabricated by electro-deposition technology. The morphologies and interface properties of NiO/GR composite film were examined by scanning electron microscopy, energy dispersive X-ray spectroscopy and electrochemical impedance spectroscopy. The modified electrode exhibits excellent sensing performance for detecting AA with linear range from 0.05 to 1100 mu M and a detection limit of 0.0167 mu M (S/N = 3). Under optimal conditions, the sensor displays excellent stability and satisfactory results in real samples analysis. (C) 2014 Published by Elsevier Ltd.
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