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Graphene-Based Nanoporous Materials Assembled by Mediation of Polyoxometalate Nanoparticles

Authors

  • Ding Zhou,

    1. National Center for Nanoscience and Technology, No. 11, Beiyitiao Zhongguancun, Beijing 100190 (China)
    2. Graduate University of Chinese Academy of Sciences, No.19A, Yuquan Road, Beijing 100049 (China)
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  • Bao-Hang Han

    Corresponding author
    1. National Center for Nanoscience and Technology, No. 11, Beiyitiao Zhongguancun, Beijing 100190 (China)
    • National Center for Nanoscience and Technology, No. 11, Beiyitiao Zhongguancun, Beijing 100190 (China).
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Abstract

A kind of graphene-based nanoporous material is prepared through assembling graphene sheets mediated through polyoxometalate nanoparticles. Owing to the strong interaction between graphene and polyoxometalate, 2D graphene sheets with honeycomb-latticed carbon atoms could assemble into a porous structure, in which 3D polyoxometalate nanoparticles serve as the crosslinkers. Nitrogen and hydrogen sorption analysis reveal that the as-prepared graphene-based hybrid material possesses a specific surface area of 680 m2 g−1 and a hydrogen uptake volume of 0.8−1.3 wt%. Infrared spectrometry is used to probe the electron density changes of polyoxometalate particle in the redox-cycle and to verify the interaction between graphene and polyoxometalate. The as-prepared graphene-based materials are further characterized by Raman spectroscopy, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy.

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