Graphene oxide/nickel oxide modified glassy carbon electrode for supercapacitor and nonenzymatic glucose sensor

Three-dimensional nickel oxide nanoparticles was synthesized by electrochemical method on the glassy carbon electrode previously modified with graphene oxide, which was applied for supercapacitor and nonenzymatic glucose sensor. Based on the extraordinarily properties of graphene oxide (GO), nickel...

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Bibliographic Details
Published in:Electrochimica acta 2013-01, Vol.88, p.708-712
Main Authors: Yuan, Baiqing, Xu, Chunying, Deng, Dehua, Xing, Yun, Liu, Lin, Pang, Huan, Zhang, Daojun
Format: Article
Language:English
Subjects:
Applied sciences
Capacitors. Resistors. Filters
Chemistry
Electrical engineering. Electrical power engineering
Electrochemical impedance spectroscopy
Electrochemistry
Electrodeposition
Electrodes
Exact sciences and technology
General and physical chemistry
Glassy carbon
Glucose
Glucose sensor
Graphene
Graphene oxide
Nickel oxide
Nickel oxides
Oxides
Scanning electron microscopy
Study of interfaces
Supercapacitor
Various equipment and components
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Summary:Three-dimensional nickel oxide nanoparticles was synthesized by electrochemical method on the glassy carbon electrode previously modified with graphene oxide, which was applied for supercapacitor and nonenzymatic glucose sensor. Based on the extraordinarily properties of graphene oxide (GO), nickel oxide nanoparticles (NiONPs)/GO/glassy carbon (GC) modified electrode was prepared by electrodeposition of NiONPs on the GC surface previously modified with GO, which was characterized by scanning electron microscope (SEM), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The results showed that GO was partially reduced and three-dimensional NiONPs were electrochemically synthesized on the surface of GO. Compared with NiONPs/GC electrode, NiONPs/GO/GC modified electrode exhibited more excellent conductivity, more superior electrochemical capacitive behavior (16-folds) and better electro-catalytic oxidation of glucose, applying for the electrochemical detection of glucose. The linear range for glucose is from 3.13μM to 3.05mM with the detection limit of 1μM. In addition, the effects of common interfering species, including ascorbic acid (AA), uric acid (UA), and NaCl were investigated in detail. The result indicated that these foreign substances did not interfere significantly on the determination of glucose.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2012.10.102