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

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

doi:10.1016/j.carbon.2019.11.031

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

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

Faculty of Science and Engineering

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

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.

Original language	English
Pages (from-to)	598-606
Number of pages	9
Journal	Carbon
Volume	158
DOIs	https://doi.org/10.1016/j.carbon.2019.11.031
Publication status	Published - Mar 2020

Keywords

Graphene oxide
Membrane
Ion beam
Ion sieving
Defect

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10.1016/j.carbon.2019.11.031

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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.",

keywords = "Graphene oxide, Membrane, Ion beam, Ion sieving, Defect",

author = "Yibin Wei and Zeljko Pastuovic and Chao Shen and Timothy Murphy and Gore, {Damian B.}",

year = "2020",

month = mar,

doi = "10.1016/j.carbon.2019.11.031",

language = "English",

volume = "158",

pages = "598--606",

journal = "Carbon",

issn = "0008-6223",

publisher = "Pergamon-Elsevier Science",

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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 - 2020/3

Y1 - 2020/3

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 - Graphene oxide

KW - Membrane

KW - Ion beam

KW - Ion sieving

KW - Defect

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DO - 10.1016/j.carbon.2019.11.031

M3 - Article

SN - 0008-6223

VL - 158

SP - 598

EP - 606

JO - Carbon

JF - Carbon

ER -

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

Abstract

Keywords

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