Near-complete blocking of multivalent anions in graphene oxide membranes with tunable interlayer spacing from 3.7 to 8.0 angstrom

Jongwoon Kim, Seung Eun Lee, Seunghwan Seo, Ju Yeon Woo, Chang-Soo Han

Research output: Contribution to journalArticle

Abstract

Graphene oxide (GO) membranes have attracted attention as a promising candidate for selective ion permeation due to narrow interlayer spacing. Among several methods to control the interlayer spacing, the reduction of GO membranes has great potential for desalination and water purification. To apply GO membranes for ion separation, investigating ion transport of sub-nanometer channels of reduced GO membranes is needed. In this study, thermally and chemically reduced GO membranes were fabricated with different interlayer spacing ranging from 3.7 to 8.0 Å in a dry state. It was experimentally determined that the minimum spacing allowing water permeation was 5.7 Å (9.6 Å in water), and no water permeated at 5.0 Å or less. For ion permeation, a pure GO membrane exhibited similar permeability for most ions, while the permeability of GO membrane with 5.7 Å spacing was strongly dependent of the size and charge of ions. The permeability of cations significantly changed along with the ionic radius, while there was a noticeable cutoff for permeability of multivalent anions such as SO4 2− and Fe(CN)6 3−. Our reduced GO membrane could be used to effectively block the permeation of large ions and multivalent anions.

Original languageEnglish
Article number117394
JournalJournal of Membrane Science
Volume592
DOIs
Publication statusPublished - 2019 Dec 15

Fingerprint

Graphite
Oxides
Graphene
Anions
interlayers
graphene
Negative ions
spacing
anions
membranes
Membranes
oxides
Ions
Permeation
Permeability
permeability
ions
Water
water
water treatment

Keywords

  • Dehydration
  • Graphene oxide
  • Interlayer spacing
  • Reduction
  • Swelling

ASJC Scopus subject areas

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

Cite this

Near-complete blocking of multivalent anions in graphene oxide membranes with tunable interlayer spacing from 3.7 to 8.0 angstrom. / Kim, Jongwoon; Lee, Seung Eun; Seo, Seunghwan; Woo, Ju Yeon; Han, Chang-Soo.

In: Journal of Membrane Science, Vol. 592, 117394, 15.12.2019.

Research output: Contribution to journalArticle

@article{a27fd8d732fe46be8d44f2bde3d4dd7c,
title = "Near-complete blocking of multivalent anions in graphene oxide membranes with tunable interlayer spacing from 3.7 to 8.0 angstrom",
abstract = "Graphene oxide (GO) membranes have attracted attention as a promising candidate for selective ion permeation due to narrow interlayer spacing. Among several methods to control the interlayer spacing, the reduction of GO membranes has great potential for desalination and water purification. To apply GO membranes for ion separation, investigating ion transport of sub-nanometer channels of reduced GO membranes is needed. In this study, thermally and chemically reduced GO membranes were fabricated with different interlayer spacing ranging from 3.7 to 8.0 {\AA} in a dry state. It was experimentally determined that the minimum spacing allowing water permeation was 5.7 {\AA} (9.6 {\AA} in water), and no water permeated at 5.0 {\AA} or less. For ion permeation, a pure GO membrane exhibited similar permeability for most ions, while the permeability of GO membrane with 5.7 {\AA} spacing was strongly dependent of the size and charge of ions. The permeability of cations significantly changed along with the ionic radius, while there was a noticeable cutoff for permeability of multivalent anions such as SO4 2− and Fe(CN)6 3−. Our reduced GO membrane could be used to effectively block the permeation of large ions and multivalent anions.",
keywords = "Dehydration, Graphene oxide, Interlayer spacing, Reduction, Swelling",
author = "Jongwoon Kim and Lee, {Seung Eun} and Seunghwan Seo and Woo, {Ju Yeon} and Chang-Soo Han",
year = "2019",
month = "12",
day = "15",
doi = "10.1016/j.memsci.2019.117394",
language = "English",
volume = "592",
journal = "Jornal of Membrane Science",
issn = "0376-7388",
publisher = "Elsevier",

}

TY - JOUR

T1 - Near-complete blocking of multivalent anions in graphene oxide membranes with tunable interlayer spacing from 3.7 to 8.0 angstrom

AU - Kim, Jongwoon

AU - Lee, Seung Eun

AU - Seo, Seunghwan

AU - Woo, Ju Yeon

AU - Han, Chang-Soo

PY - 2019/12/15

Y1 - 2019/12/15

N2 - Graphene oxide (GO) membranes have attracted attention as a promising candidate for selective ion permeation due to narrow interlayer spacing. Among several methods to control the interlayer spacing, the reduction of GO membranes has great potential for desalination and water purification. To apply GO membranes for ion separation, investigating ion transport of sub-nanometer channels of reduced GO membranes is needed. In this study, thermally and chemically reduced GO membranes were fabricated with different interlayer spacing ranging from 3.7 to 8.0 Å in a dry state. It was experimentally determined that the minimum spacing allowing water permeation was 5.7 Å (9.6 Å in water), and no water permeated at 5.0 Å or less. For ion permeation, a pure GO membrane exhibited similar permeability for most ions, while the permeability of GO membrane with 5.7 Å spacing was strongly dependent of the size and charge of ions. The permeability of cations significantly changed along with the ionic radius, while there was a noticeable cutoff for permeability of multivalent anions such as SO4 2− and Fe(CN)6 3−. Our reduced GO membrane could be used to effectively block the permeation of large ions and multivalent anions.

AB - Graphene oxide (GO) membranes have attracted attention as a promising candidate for selective ion permeation due to narrow interlayer spacing. Among several methods to control the interlayer spacing, the reduction of GO membranes has great potential for desalination and water purification. To apply GO membranes for ion separation, investigating ion transport of sub-nanometer channels of reduced GO membranes is needed. In this study, thermally and chemically reduced GO membranes were fabricated with different interlayer spacing ranging from 3.7 to 8.0 Å in a dry state. It was experimentally determined that the minimum spacing allowing water permeation was 5.7 Å (9.6 Å in water), and no water permeated at 5.0 Å or less. For ion permeation, a pure GO membrane exhibited similar permeability for most ions, while the permeability of GO membrane with 5.7 Å spacing was strongly dependent of the size and charge of ions. The permeability of cations significantly changed along with the ionic radius, while there was a noticeable cutoff for permeability of multivalent anions such as SO4 2− and Fe(CN)6 3−. Our reduced GO membrane could be used to effectively block the permeation of large ions and multivalent anions.

KW - Dehydration

KW - Graphene oxide

KW - Interlayer spacing

KW - Reduction

KW - Swelling

UR - http://www.scopus.com/inward/record.url?scp=85071007873&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85071007873&partnerID=8YFLogxK

U2 - 10.1016/j.memsci.2019.117394

DO - 10.1016/j.memsci.2019.117394

M3 - Article

VL - 592

JO - Jornal of Membrane Science

JF - Jornal of Membrane Science

SN - 0376-7388

M1 - 117394

ER -