期刊
BIOSENSORS & BIOELECTRONICS
卷 56, 期 -, 页码 137-143出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2014.01.014
关键词
MoS2-graphene; Horseradish peroxidase; Layered nanocomposites; Electrocatalysis; Hydrogen peroxide
类别
资金
- National Natural Science Foundation of China [NSFC-21065007]
- Education Department Science Foundation of Jiangxi Province [GJJ-10037]
- Graduate Student Innovation Program of Nanchang University [YC2013-S043]
- State Key Laboratory of Food Science and Technology of Nanchang University [SKLF-ZZA-201302, SKLF-ZZB-201303]
The self-assembly of layered molybdenum disulfide-graphene (MoS2-Gr) and horseradish peroxidase (HRP) by electrostatic attraction into a novel hybrid nanomaterial (HRP-MoS2-Gr) is reported. The properties of the MoS2-Gr were characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (TEM), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). UV-vis and Fourier transform infrared spectroscopy (Fr-IR) indicate that the native structure of the HRP is maintained after the assembly, implying good biocompatibility of MoS2-Gr nanocomposite. Furthermore, the HRP-MoS2-Gr composite is utilized as a biosensor, which displays electrocatalytic activity to hydrogen peroxide (H2O2) with high sensitivity (679.7 mu A mM(-1) cm(-2)), wide linear range (0.2 mu M-1.103 mM), low detection limit (0.049 mu pM), and fast amperometric response. In addition, the biosensor also exhibits strong anti-interference ability, satisfactory stability and reproducibility. These desirable electrochemical properties are attributed to the good biocompatibility and electron transport efficiency of the MoS2-Gr composite, as well as the high loading of HRP. Therefore, this biosensor is potentially suitable for H2O2 analysis in environmental, pharmaceutical, food or industrial applications. (C) 2014 Elsevier B.V. All rights reserved.
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