Redox-mediated high-yield exfoliation of layered composites into nanosheets

Yuna Yamamoto, Hiroaki Imai, Yuya Oaki

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


A variety of organic and inorganic layered compounds are exfoliated into 2D nanomaterials in liquid phase. Improvement of exfoliation yield is a significant challenge for further applications of 2D nanomaterials. However, yield of transition-metal-oxide nanosheets is not so high, such as around 5% for 240 h and 15% for 120 h, in previous exfoliation methods. Here we show a new exfoliation approach to high-yield synthesis of nanosheets. A layered composite of cobalt hydroxide and guest quinone derivative was exfoliated into nanosheets through redox reactions of the interlayer guests in the yield 1657% for 1 h under mild conditions. The redox reactions of the guest molecules on the layer facilitate efficient exfoliation through improvement of the affinity between the guest and dispersion medium. The present redox-mediated exfoliation approach can be applied to efficient synthesis of a variety of 2D nanomaterials from layered composites.

Original languageEnglish
Pages (from-to)779-784
Number of pages6
JournalBulletin of the Chemical Society of Japan
Issue number4
Publication statusPublished - 2019


  • Exfoliation
  • Layered materials
  • Nanosheets

ASJC Scopus subject areas

  • Chemistry(all)


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