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Facile Synthesis of Au-Nanoparticle/Polyoxometalate/Graphene Tricomponent Nanohybrids: An Enzyme-Free Electrochemical Biosensor for Hydrogen Peroxide

Authors

  • Rongji Liu,

    1. Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, 100190, Beijing, PR China
    2. Graduate University of Chinese Academy of Sciences, 100049, Beijing, PR China
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  • Shiwen Li,

    1. Laboratoire de Chimie Physique, Equipe d'Electrochimie et de Photoélectrochimie, UMR 8000 CNRS, Université Paris-Sud 11, 91405 Orsay Cedex, France
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  • Xuelian Yu,

    1. Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, 100190, Beijing, PR China
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  • Guangjin Zhang,

    Corresponding author
    1. Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, 100190, Beijing, PR China
    • Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, 100190, Beijing, PR China
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  • Suojiang Zhang,

    Corresponding author
    1. Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, 100190, Beijing, PR China
    • Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, 100190, Beijing, PR China
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  • Jiannian Yao,

    1. Beijing National Laboratory for Molecular Science, Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, PR China
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  • Bineta Keita,

    Corresponding author
    1. Laboratoire de Chimie Physique, Equipe d'Electrochimie et de Photoélectrochimie, UMR 8000 CNRS, Université Paris-Sud 11, 91405 Orsay Cedex, France
    • Laboratoire de Chimie Physique, Equipe d'Electrochimie et de Photoélectrochimie, UMR 8000 CNRS, Université Paris-Sud 11, 91405 Orsay Cedex, France.
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  • Louis Nadjo,

    1. Laboratoire de Chimie Physique, Equipe d'Electrochimie et de Photoélectrochimie, UMR 8000 CNRS, Université Paris-Sud 11, 91405 Orsay Cedex, France
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  • Linjie Zhi

    1. National Center for Nanoscience and Technology of China, Zhongguancun, Beiyitiao 11, 100190, Beijing, PR China
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Abstract

A green, facile, one-pot synthesis of well-defined Au NPs@POM–GNSs tricomponent nanohybrids is reported (POM stands for polyoxometalate and GNSs for graphene nanosheets). The synthesis is convenient, rapid and environmentally friendly. The POMs serve as both reducing, encapsulating molecules, and bridging molecules; this avoids the introduction of other organic toxic molecules. Characterization using transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy analysis is performed, and the structure of the prepared nanohybrids of Au NPs@POM–GNSs is verified. Most importantly, the amperometric measurements show the Au NPs@POM–GNSs nanohybrids have high catalytic activity with good sensitivity, good long-term stability, wide linear range, low detection limit, and fast response towards H2O2 detection for application as an enzyme-free biosensor. Transformation of the POMs during H2O2 detection does not affect the catalytic activities of the nanohybrids. Thus, the synergistic effect of Au NPs and GNSs in the nanohybrids leads to the enhanced catalytic property.

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