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Exfoliation of black phosphorus in ionic liquids

机译：离子液体中黑色磷的剥离

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摘要

We report the characterization and formation of sonication-assisted liquid phase exfoliation of bulk black phosphorus (BP) crystals with the incorporation of two representative ionic liquids (ILs) ([Emim][Tf2N] and [Bmim][Tf2N]) as green dispersing media was attempted, which resulted in stable dispersion of multi-layer BP flakes with unsuspected high oxidation resistance and chemical/structural integrity due to the presence of IL layer on top of BP flakes. There are two unveiled issues for the generation of BP dispersion in ILs. First, thin films of BP flakes can be simply prepared through our approach. Because self-oxidation of BP in ambient condition can be significantly minimized in ILs, vacuum filtration step can be adopted to produce BP thin films in ambient condition. Second, the binding of IL molecules on BP flakes has been firstly demonstrated by the time-of-flight secondary ion mass spectrometry characterization. In addition to the exploitation of ILs as the green solvents with less environmental harmfulness, IL-based exfoliation of BP might be easily scalable because harsh control of atmospheric oxygen and moisture is unnecessary in this approach.
机译：我们报告了将散装黑磷（BP）晶体的超声辅助液相剥离的表征和形成与掺入两种代表性离子液体（ILS）（[emim] [TF2N]和[Bmim] [TF2N]）作为绿色分散尝试了培养基，导致​​多层BP薄片的稳定分散，由于在BP薄片顶部存在IL层的存在而具有未缺乏的高氧化抗性和化学/结构完整性。在ILS中产生BP色散有两个揭幕问题。首先，可以通过我们的方法简单地制备BP薄片的薄膜。因为在ILS中可以显着最小化ELS中BP的自氧化，因此可以采用真空过滤步骤在环境条件下生产BP薄膜。其次，通过飞行时间二次离子质谱表征首先证明了IL分子对BP薄片的结合。除了利用ILS作为具有较少环境危害的绿色溶剂之外，BP的基于IL的剥离可能很容易可扩展，因为在这种方法中不需要对大气氧和水分进行苛刻的控制。

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  • 来源
    《Nanotechnology》 |2017年第12期|共7页
  • 作者

    Lee Miyeon; Roy Arup Kumer; Jo Seongho; Choi Yujin; Chae Ari; Kim Bongsoo; Park Sung Yong; In Insik;

  • 作者单位

    Korea Adv Inst Sci &

    Technol Dept Chem 291 Daehak Ro Daejeon 34141 South Korea;

    Korea Natl Univ Transportat Dept Polymer Sci &

    Engn Chungbuk 27909 South Korea;

    Korea Natl Univ Transportat Dept IT Convergence Brain Korea PLUS 21 Chungju 380702 South Korea;

    Korea Natl Univ Transportat Dept IT Convergence Brain Korea PLUS 21 Chungju 380702 South Korea;

    Korea Natl Univ Transportat Dept Polymer Sci &

    Engn Chungbuk 27909 South Korea;

    Korea Adv Inst Sci &

    Technol Dept Chem 291 Daehak Ro Daejeon 34141 South Korea;

    Korea Natl Univ Transportat Dept Chem &

    Biol Engn Chungju 380702 South Korea;

    Korea Natl Univ Transportat Dept Polymer Sci &

    Engn Chungbuk 27909 South Korea;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    black phosphorus; 2D nanomaterial; ionic liquids; sonication-assisted liquid phase exfoliation;

    机译：黑色磷;2D纳米材料;离子液体;超声辅助液相去角质;

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