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Membrane of Functionalized Reduced Graphene Oxide Nanoplates with Angstrom-Level Channels.

ABSTRACT: Membranes with atomic level pores or constrictions are valuable for separation and catalysis. We report a graphene-based membrane with an interlayer spacing of 3.7 angstrom (Å). When graphene oxide nanoplates are functionalized and then reduced, the laminated reduced graphene oxide (rGO) nanoplates or functionalized rGO membrane is little affected by an intercalated fluid, and the interlayer spacing of 3.7?Å increases only to 4.4?Å in wetted state, in contrast to the graphene oxide (GO) membrane whose interlayer spacing increases from 9?Å to 13?Å in wetted state. When applied to ion separation, this membrane reduced the permeation rate of small ions such as K(+) and Na(+) by three orders of magnitude compared to the GO membrane.

SUBMITTER: Lee B

PROVIDER: S-EPMC4910041 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature

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Membrane of Functionalized Reduced Graphene Oxide Nanoplates with Angstrom-Level Channels.

Lee Byeongho B Li Kunzhou K Yoon Hong Sik HS Yoon Jeyong J Mok Yeongbong Y Lee Yan Y Lee Hong H HH Kim Yong Hyup YH

Scientific reports 20160616

Membranes with atomic level pores or constrictions are valuable for separation and catalysis. We report a graphene-based membrane with an interlayer spacing of 3.7 angstrom (Å). When graphene oxide nanoplates are functionalized and then reduced, the laminated reduced graphene oxide (rGO) nanoplates or functionalized rGO membrane is little affected by an intercalated fluid, and the interlayer spacing of 3.7 Å increases only to 4.4 Å in wetted state, in contrast to the graphene oxide (GO) membrane ...[more]

PMID: 27306853

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