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One-Step Ionic-Liquid-Assisted Electrochemical Synthesis of Ionic-Liquid-Functionalized Graphene Sheets Directly from Graphite

Liu, Na ; Luo, Fang ; Wu, Haoxi ; Liu, Yinghui ; Zhang, Chao ; Chen, Ji

Advanced functional materials, 2008-05, Vol.18 (10), p.1518-1525 [Periódico revisado por pares]

Weinheim: WILEY-VCH Verlag

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  • Título:
    One-Step Ionic-Liquid-Assisted Electrochemical Synthesis of Ionic-Liquid-Functionalized Graphene Sheets Directly from Graphite
  • Autor: Liu, Na ; Luo, Fang ; Wu, Haoxi ; Liu, Yinghui ; Zhang, Chao ; Chen, Ji
  • Assuntos: carbon nanostructures ; electrochemical synthesis ; graphene ; graphite ; ionic liquids
  • É parte de: Advanced functional materials, 2008-05, Vol.18 (10), p.1518-1525
  • Notas: ArticleID:ADFM200700797
    ark:/67375/WNG-9TW6X7GF-6
    This project was sponsored by the Scientific Research Foundation for Returned Overseas Chinese Scholars, the State Education Ministry, and the Scientific Innovation Foundation for Undergraduates, Northeast Normal University. Supporting Information is available online from Wiley InterScience or from the author.
    istex:E72189BE2F89569663961E9DBD5924AAC5DDDBAA
    ObjectType-Article-2
    SourceType-Scholarly Journals-1
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  • Descrição: Graphite, inexpensive and available in large quantities, unfortunately does not readily exfoliate to yield individual graphene sheets. Here a mild, one‐step electrochemical approach for the preparation of ionic‐liquid‐functionalized graphite sheets with the assistance of an ionic liquid and water is presented. These ionic‐liquid‐treated graphite sheets can be exfoliated into functionalized graphene nanosheets that can not only be individuated and homogeneously distributed into polar aprotic solvents, but also need not be further deoxidized. Different types of ionic liquids and different ratios of the ionic liquid to water can influence the properties of the graphene nanosheets. Graphene nanosheet/polystyrene composites synthesized by a liquid‐phase blend route exhibit a percolation threshold of 0.1 vol % for room temperature electrical conductivity, and, at only 4.19 vol %, this composite has a conductivity of 13.84 S m−1, which is 3–15 times that of polystyrene composites filled with single‐walled carbon nanotubes. Ionic‐liquid‐functionalized graphene nanosheets (GNSIL) are produced by a simple, green, one‐step electrochemical approach (see figure). A GNSIL/polystyrene composite is shown to have excellent electrical conductivity, 3–15 times that of polystyrene composites with single‐walled carbon nanotube filler.
  • Editor: Weinheim: WILEY-VCH Verlag
  • Idioma: Inglês
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