Ion beam engineered graphene oxide membranes for mono-/divalent metal ions separation

Yibin Wei, Zeljko Pastuovic, Chao Shen, Timothy Murphy, Damian B. Gore

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Graphene oxide (GO) membranes with precisely controlled nanopores are promising for selectively ionic separation. Here, an ion beam was used to efficiently and simply post-modify GO membranes, creating nanopores in a controllable manner. We compared the influence of GO membrane thickness and ion fluence on the GO structure and the consequent mono-/di-valent metal ion separation performance. Experimental results indicate all GO membranes exhibited improved K+ selectivity with respect to other ions after ion beam irradiation. Moreover, the K+ ion permeability of the optimal membranes is up to 1.4 × 10−3 mol m−2 h−1 and the membrane shows extremely high K+ separation factor to di-valent ions. Remarkably, this method could be used as an in-situ post-treatment for pre-assembled GO membranes. We believe that this strategy offers novel insights into fabricating nanoporous membranes constructed by two-dimensional nanomaterials for a variety of fields including energy, desalination and biomedical applications.
LanguageEnglish
JournalCarbon
DOIs
Publication statusAccepted/In press - 10 Nov 2019

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Oxides
Graphene
Ion beams
Metal ions
Membranes
Ions
Nanopores
Desalination
Nanostructured materials
Irradiation

Keywords

  • Defect
  • Graphene oxide
  • Ion beam
  • Ion sieving
  • Membrane

Cite this

Wei, Yibin ; Pastuovic, Zeljko ; Shen, Chao ; Murphy, Timothy ; Gore, Damian B. / Ion beam engineered graphene oxide membranes for mono-/divalent metal ions separation. In: Carbon. 2019.
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title = "Ion beam engineered graphene oxide membranes for mono-/divalent metal ions separation",
abstract = "Graphene oxide (GO) membranes with precisely controlled nanopores are promising for selectively ionic separation. Here, an ion beam was used to efficiently and simply post-modify GO membranes, creating nanopores in a controllable manner. We compared the influence of GO membrane thickness and ion fluence on the GO structure and the consequent mono-/di-valent metal ion separation performance. Experimental results indicate all GO membranes exhibited improved K+ selectivity with respect to other ions after ion beam irradiation. Moreover, the K+ ion permeability of the optimal membranes is up to 1.4 × 10−3 mol m−2 h−1 and the membrane shows extremely high K+ separation factor to di-valent ions. Remarkably, this method could be used as an in-situ post-treatment for pre-assembled GO membranes. We believe that this strategy offers novel insights into fabricating nanoporous membranes constructed by two-dimensional nanomaterials for a variety of fields including energy, desalination and biomedical applications.",
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Ion beam engineered graphene oxide membranes for mono-/divalent metal ions separation. / Wei, Yibin; Pastuovic, Zeljko; Shen, Chao; Murphy, Timothy; Gore, Damian B.

In: Carbon, 10.11.2019.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Ion beam engineered graphene oxide membranes for mono-/divalent metal ions separation

AU - Wei, Yibin

AU - Pastuovic, Zeljko

AU - Shen, Chao

AU - Murphy, Timothy

AU - Gore, Damian B.

PY - 2019/11/10

Y1 - 2019/11/10

N2 - Graphene oxide (GO) membranes with precisely controlled nanopores are promising for selectively ionic separation. Here, an ion beam was used to efficiently and simply post-modify GO membranes, creating nanopores in a controllable manner. We compared the influence of GO membrane thickness and ion fluence on the GO structure and the consequent mono-/di-valent metal ion separation performance. Experimental results indicate all GO membranes exhibited improved K+ selectivity with respect to other ions after ion beam irradiation. Moreover, the K+ ion permeability of the optimal membranes is up to 1.4 × 10−3 mol m−2 h−1 and the membrane shows extremely high K+ separation factor to di-valent ions. Remarkably, this method could be used as an in-situ post-treatment for pre-assembled GO membranes. We believe that this strategy offers novel insights into fabricating nanoporous membranes constructed by two-dimensional nanomaterials for a variety of fields including energy, desalination and biomedical applications.

AB - Graphene oxide (GO) membranes with precisely controlled nanopores are promising for selectively ionic separation. Here, an ion beam was used to efficiently and simply post-modify GO membranes, creating nanopores in a controllable manner. We compared the influence of GO membrane thickness and ion fluence on the GO structure and the consequent mono-/di-valent metal ion separation performance. Experimental results indicate all GO membranes exhibited improved K+ selectivity with respect to other ions after ion beam irradiation. Moreover, the K+ ion permeability of the optimal membranes is up to 1.4 × 10−3 mol m−2 h−1 and the membrane shows extremely high K+ separation factor to di-valent ions. Remarkably, this method could be used as an in-situ post-treatment for pre-assembled GO membranes. We believe that this strategy offers novel insights into fabricating nanoporous membranes constructed by two-dimensional nanomaterials for a variety of fields including energy, desalination and biomedical applications.

KW - Defect

KW - Graphene oxide

KW - Ion beam

KW - Ion sieving

KW - Membrane

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DO - 10.1016/j.carbon.2019.11.031

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SN - 0008-6223

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