Activation routes for high surface area graphene monoliths from graphene oxide colloids

Shuwen Wang, Ferdinando Tristan, Daiki Minami, Toshihiko Fujimori, Rodolfo Cruz-Silva, Mauricio Terrones, Kenji Takeuchi, Katsuya Teshima, Francisco Rodríguez-Reinoso, Morinobu Endo, Katsumi Kaneko

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

Graphene monoliths made from graphene oxide colloids by unidirectional freeze-drying method were activated by typical activation processes of CO 2 activation, chemical activation using ZnCl2 or H 3PO4, and KOH activation. The porosity development of graphene monolith markedly depends on the activation method. The monoliths with highest surface area are obtained by the KOH activation method; only the KOH activation is effective for production of the graphene monolith of which surface area is in the range of 1760-2150 m2 g-1. The mechanism of the porosity development by KOH activation method is proposed. This work provides a promising route for the bottom-up design of pore width-tunable nanoporous carbons.

Original languageEnglish (US)
Pages (from-to)220-231
Number of pages12
JournalCarbon
Volume76
DOIs
StatePublished - Sep 2014

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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