Porous Cu-NiO modified glass carbon electrode enhanced nonenzymatic glucose electrochemical sensors.
Porous Cu-NiO nanocomposites were successfully prepared by calcination of the Cu-Ni(OH)(2) precursor at 400 °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 μA mM(-1), with a low detection limit of 0.5 μM (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.
College of Chemistry and Materials Science, Anhui Key Laboratory of Functional Molecular Solids, Anhui Normal University, Wuhu, PR China. zhangxiaojun173@yahoo.com.cn
Xiaojun
X
Zhang
Aixia
A
Gu
Guangfeng
G
Wang
Yan
Y
Huang
Huiqing
H
Ji
Bin
B
Fang
D002244:Carbon / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D058266:Dielectric Spectroscopy; D055664:Electrochemical Techniques / Q000295:instrumentation*; D004566:Electrodes; D005898:Glass / Q000737:chemistry; D005947:Glucose / Q000032:analysis*; D006358:Hot Temperature; D053761:Nanocomposites / Q000737:chemistry / Q000648:ultrastructure; D009532:Nickel / Q000737:chemistry*; D016062:Porosity
D002244:Carbon; D003300:Copper; D009532:Nickel; C028007:nickel monoxide; D005947:Glucose