A one-step, solvothermal reduction method for producing reduced graphene oxide dispersions in organic solvents

Sergey Dubin, Scott Gilje*, Kan Wang, Chun-Chih Tung, Kitty Cha, Anthony S. Hall, Jabari Farrar, Rupal Varshneya, Yang Yang, Richard B. Kaner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

478 Scopus citations

Abstract

Refluxing graphene oxide (GO) in N-methyl-2-pyrrolidinone (NMP) results in deoxygenation and reduction to yield a stable colloidal dispersion. The solvothermal reduction is accompanied by a color change from light brown to black. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) images of the product confirm the presence of single sheets of the solvothermally reduced graphene oxide (SRGO). X-ray photoelectron spectroscopy (XPS) of SRGO indicates a significant increase in intensity of the C=C bond character, while the oxygen content decreases markedly after the reduction is complete. X-ray diffraction analysis of SRGO shows a single broad peak at 26.24° 2θ (3.4 Å), confirming the presence of graphitic stacking of reduced sheets. SRGO sheets are redispersible in a variety of organic solvents, which may hold promise as an acceptor material for bulk heterojunction photovoltaic cells, or electromagnetic interference shielding applications.

Original languageEnglish (US)
Pages (from-to)3845-3852
Number of pages8
JournalACS Nano
Volume4
Issue number7
DOIs
StatePublished - Jul 27 2010

Keywords

  • composite
  • graphene
  • graphite oxide
  • reduced graphene oxide
  • reduction
  • solar cell
  • solvothermal

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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