High-rate production of few-layer graphene by high-power probe sonication

Yoshihiko Arao*, Masatoshi Kubouchi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)


Graphene can be obtained via sonication-assisted liquid-phase exfoliation, but the production rate of few-layer graphene (FLG) is still low. A high-power probe sonicator was used in this study to improve the production rate of FLG, and its performance was optimized by controlling processing parameters such as the initial graphite concentration, surfactant concentration and liquid volume. By optimizing processing parameters, production rate of FLG dispersions in N-methyl-2-pyrrolidone (NMP) were greater than 1 g/h, which is the best value achieved in the sonication-assisted exfoliation process. In the case of liquid exfoliation in water/surfactant solution, production rate of FLG was achieved approximately 0.28 g/h. Our work here demonstrates that graphene concentration in a probe-sonication process does not depend on the shape of vessel, and it is predictable by power law models.

Original languageEnglish
Pages (from-to)802-808
Number of pages7
Publication statusPublished - 2015 Oct 11
Externally publishedYes


  • Graphene
  • Liquid-phase exfoliation
  • Sonication

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)


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