An amperometric glucose biosensor based on a MnO2/graphene composite modified electrode

Liu, Yuge and Zhang, Xiumei and He, Dongning and Ma, Feiyue and Fu, Qiong and Hu, Yun (2016) An amperometric glucose biosensor based on a MnO2/graphene composite modified electrode. RSC Advances, 6 (22). 18654-18661 .

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Abstract

In this paper, a novel composite of graphene/MnO2 (GR/MnO2) was successfully synthesized by a simple one-step hydrothermal method. The as-synthesized MnO2 and the composite were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR). The results showed that MnO2 was nanorods and the two materials were perfectly composited. The composite was decorated on a glassy carbon electrode (GCE) and used for the entrapment of glucose oxidase (GOD). Electrochemical results showed that the
composite modified electrode showed a pair of well-defined redox peaks, and the direct electron transfer between GOD and the electrode surface was accelerated. The sensor fabricated by the composite modified electrode showed an excellent response to the oxidation of glucose with a wide
linear range (0.04 to 2 mM), low detection limit (10 mM), and high sensitivity (3.3 mA mM-1 cm-2). The sensor also exhibited excellent reproducibility, stability and selectivity, and it can be used in the determination of glucose in real samples.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Paper made available under a Creative Commons: Attribution-Noncommercial 4.0 License.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 23 Feb 2017 23:30
Last Modified: 23 Feb 2017 23:32
Uncontrolled Keywords: biosensor; hydrothermal method; MnO2/graphene composite modified electrode
Fields of Research : 03 Chemical Sciences > 0301 Analytical Chemistry > 030102 Electroanalytical Chemistry
Socio-Economic Objective: B Economic Development > 85 Energy > 8599 Other Energy > 859999 Energy not elsewhere classified
Identification Number or DOI: 10.1039/c6ra02680j
URI: http://eprints.usq.edu.au/id/eprint/30268

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