Tailoring the oxygen content of graphite and reduced graphene oxide for specific applications

Naoki Morimoto, Takuya Kubo, Yuta Nishina

Research output: Contribution to journalArticle

129 Citations (Scopus)

Abstract

Graphene oxide (GO) is widely recognized as a promising material in a variety of fields, but its structure and composition has yet to be fully controlled. We have developed general strategies to control the oxidation degree of graphene-like materials via two methods: oxidation of graphite by KMnO4 in H2 SO4 (oGO), and reduction of highly oxidized GO by hydrazine (rGO). Even though the oxygen content may be the same, oGO and rGO have different properties, for example the adsorption ability, oxidation ability, and electron conductivity. These differences in property arise from the difference in the underlying graphitic structure and the type of defect present. Our results can be used as a guideline for the production of tailor-made graphitic carbons. As an example, we show that rGO with 23.1 wt% oxygen showed the best performance as an electrode of an electric double-layer capacitor.

Original languageEnglish
Article number21715
JournalScientific reports
Volume6
DOIs
Publication statusPublished - Feb 25 2016

ASJC Scopus subject areas

  • General

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