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Sensors 2016, 16(11), 1791; doi:10.3390/s16111791

Nonenzymatic Glucose Sensor Based on In Situ Reduction of Ni/NiO-Graphene Nanocomposite

1,2,†
,
1,†,* , 1
,
1
,
1
and
1,3,*
1
State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
2
CRRC Institute, Beijing 100070, China
3
Beijing Municipal Key Laboratory for Advanced Energy Materials and Technologies, Beijing 100083, China
These authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Academic Editor: Huangxian Ju
Received: 22 August 2016 / Revised: 8 October 2016 / Accepted: 17 October 2016 / Published: 26 October 2016
(This article belongs to the Special Issue Nanobiosensing for Sensors)
View Full-Text   |   Download PDF [3546 KB, uploaded 26 October 2016]   |  

Abstract

Ni/NiO nanoflower modified reduced graphene oxide (rGO) nanocomposite (Ni/NiO-rGO) was introduced to screen printed electrode (SPE) for the construction of a nonenzymatic electrochemical glucose biosensor. The Ni/NiO-rGO nanocomposite was synthesized by an in situ reduction process. Graphene oxide (GO) hybrid Nafion sheets first chemical adsorbed Ni ions and assembled on the SPE. Subsequently, GO and Ni ions were reduced by hydrazine hydrate. The electrochemical properties of such a Ni/NiO-rGO modified SPE were carefully investigated. It showed a high activity for electrocatalytic oxidation of glucose in alkaline medium. The proposed nonenzymatic sensor can be utilized for quantification of glucose with a wide linear range from 29.9 μM to 6.44 mM (R = 0.9937) with a low detection limit of 1.8 μM (S/N = 3) and a high sensitivity of 1997 μA/mM∙cm−2. It also exhibited good reproducibility as well as high selectivity. View Full-Text
Keywords: nonenzymatic; glucose; graphene; biosensor; in situ nonenzymatic; glucose; graphene; biosensor; in situ
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Zhang, X.; Zhang, Z.; Liao, Q.; Liu, S.; Kang, Z.; Zhang, Y. Nonenzymatic Glucose Sensor Based on In Situ Reduction of Ni/NiO-Graphene Nanocomposite. Sensors 2016, 16, 1791.

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