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

文献类型： 外文期刊

作者： Liu, Yuge 1 ; Zhang, Xiumei 1 ; He, Dongning 2 ; Ma, Feiyue 1 ; Fua, Qiong 1 ; Hu, Yun 3 ;

作者机构： 1.Chinese Acad Trop Agr Sci, South Subtrop Crop Res Inst, Key Lab Trop Fruit Biol, Minist Agr, Zhanjiang 524091, Peoples R China

2.Univ So Queensland, Ctr Excellence Engineered Fibre Composites, Toowoomba, Qld 4350, Australia

3.China Tobacco Guizhou Ind Co Ltd, Ctr Technol, Guiyang 550002, Peoples R China

期刊名称：RSC ADVANCES （ 影响因子：3.361； 五年影响因子：3.39 ）

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收录情况： SCI

摘要： 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 mu A 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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