Journal
ANALYST
Volume 136, Issue 24, Pages 5175-5180Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1an15784a
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Funding
- National Natural Science Foundation of China [20901003, 21073001, 21005001]
- Natural Science Foundation of Anhui [KJ2009B013Z]
- Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical Engineering [OFCC0905]
- Anhui Normal University [2009xqnzc19]
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Porous Cu-NiO nanocomposites were successfully prepared by calcination of the Cu-Ni(OH)(2) precursor at 400 degrees C for 2 h. During the process of calcination, Ar was used to deaerate O-2. The structure and morphology of Cu-NiO were characterized by X-ray diffraction spectrum (XRD), energy dispersive X-ray analyses (EDX), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). Using porous Cu-NiO nanocomposites, a simple non-enzymatic amperometric sensor has been fabricated (Cu-NiO/GCE) and evaluated by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and typical amperometric method. When applied to detect glucose by the amperometric method, Cu-NiO/GCE produced an ultrahigh sensitivity of 171.8 mu A mM(-1), with a low detection limit of 0.5 mu M(S/N = 3). What's more, interference from common co-existing species, such as UA, AA, and fructose can be avoided at the sensor. Results in this study imply that porous Cu-NiO nanocomposites are promising nanomaterials for the enzyme-free determination of glucose.
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