Aqueous only route toward graphene from graphite oxide

Ken Hsuan Liao, Anudha Mittal, Shameek Bose, Christopher Leighton, K. Andre Mkhoyan, Christopher W. MacOsko

Research output: Contribution to journalArticlepeer-review

222 Scopus citations

Abstract

We report a new, simple, hydrazine-free, high-yield method for producing single-layer graphene sheets. Graphene sheets were formed from graphite oxide by reduction with simple deionized water at 95 °C under atmospheric pressure. Over 65% of the sheets are single graphene layers; the average sheet diameter is 300 nm. We speculate that dehydration of graphene oxide is the main mechanism for oxygen reduction and transformation of C-C bonds from sp3 to sp2. The reduction appears to occur in large uniform interconnected oxygen-free patches so that despite the presence of residual oxygen the sp 2 carbon bonds formed on the sheets are sufficient to provide electronic properties comparable to reduced graphene sheets obtained using other methods.

Original languageEnglish (US)
Pages (from-to)1253-1258
Number of pages6
JournalACS nano
Volume5
Issue number2
DOIs
StatePublished - Feb 22 2011

Keywords

  • aqueous route
  • dehydration
  • graphene
  • graphene oxide
  • oxygen reduction

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