Tunable semi-permeability of graphene-based membranes by adjusting reduction degree of laminar graphene oxide layer

Euntae Yang, Moon Ho Ham, Ho Bum Park, Chang Min Kim, Jun ho Song, In S. Kim

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Membrane-based water reuse and desalination technologies have been increasingly popular as an alternative water resource for mitigating global water scarcity. However, intrinsic limitations of conventional membranes restrict a further advance in membrane-based technologies. Recently, laminar-structure graphene oxide (GO) membranes fabricated by staking GO nanoplatelets have been emerging as a new water purification membrane with overcoming the conventional membrane limitations because of ultra-fast water permeation and precise molecular sieving capability based on ultra-low friction and well-defined nanochannels; to apply laminar GO membranes for ion removal such as desalination, tuning size of GO nanochannels within a sub-nanometer range is required. Herein, we adjusted reduction degree of GO laminates via varying exposure time to hydroiodic acid steam to control the size of GO nanochannels in a sub-nanometer range. Control of the hydroiodic acid vapor exposure time is a facile way to tune the nanochannel size in a sub-nanometer, and consequentially monovalent ion rejection rate can be handled.

Original languageEnglish
Pages (from-to)73-79
Number of pages7
JournalJournal of Membrane Science
Volume547
DOIs
StatePublished - 2018 Feb 1

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Graphite
Oxides
Graphene
Permeability
permeability
graphene
adjusting
membranes
Membranes
oxides
Water
Desalination
Ions
water
Technology
Water Resources
water resources
acids
water treatment
Acids

Keywords

  • Graphene oxide
  • Ion rejection
  • Nanochannel
  • Reduction degree

Cite this

Yang, Euntae ; Ham, Moon Ho ; Park, Ho Bum ; Kim, Chang Min ; Song, Jun ho ; Kim, In S. / Tunable semi-permeability of graphene-based membranes by adjusting reduction degree of laminar graphene oxide layer. In: Journal of Membrane Science. 2018 ; Vol. 547. pp. 73-79.
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Tunable semi-permeability of graphene-based membranes by adjusting reduction degree of laminar graphene oxide layer. / Yang, Euntae; Ham, Moon Ho; Park, Ho Bum; Kim, Chang Min; Song, Jun ho; Kim, In S.

In: Journal of Membrane Science, Vol. 547, 01.02.2018, p. 73-79.

Research output: Contribution to journalArticle

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AU - Ham, Moon Ho

AU - Park, Ho Bum

AU - Kim, Chang Min

AU - Song, Jun ho

AU - Kim, In S.

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