期刊
BIOSENSORS & BIOELECTRONICS
卷 24, 期 11, 页码 3395-3398出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2009.04.031
关键词
Carbon nanotubes; Nanocomposites; Electrochemical properties; Biosensors
类别
资金
- Natural Science Foundation of Educational Department of Anhui Province [KJ200813167]
- National Natural Science Foundation of China [20675001]
Cu2O/MWCNT (multi-walled carbon nanotubes) nanocomposites were successfully prepared in large quantities with a new fixure-reduction method under low temperature. The morphology and shape of the Cu2O/MWCNTs nanocomposites were characterized by field emission scanning electron microscopes (FESEMs), energy dispersive X-ray (EDX), X-ray photoelectron spectroscopy (XPS) and X-ray powder diffraction (XRD), respectively. Cyclic voltammetry (CV) was used to evaluate the electrochemical performance of the Cu2O/MWCNTs nanocomposites modified electrode towards glucose. Compared to the bare GCE, the Cu2O nanoparticles and the MWCNTs modified electrode, the Cu2O/MWCNTs modified electrode displays high electrocatalytic activity towards the oxidation of glucose. With a potential of -0.20V, the Cu2O/MWCNTs modified electrode was used to determine glucose by amperometric, showing significantly lower overvoltage and a linear dependence (R = 0.9958) in the concentration up to 10 mu M with a sensitivity of 6.53 mu A mu mol L-1 and a detection limit of 0.05 mu mol L-1 (signal-to-noise ratio of 3). In summary, the preparation process of the nanocomposites is very simple and the nanocomposites could be used for the development of enzyme-free glucose sensor. (C) 2009 Elsevier B.V. All rights reserved.
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