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ID 69366
フルテキストURL
fulltext.pdf 6.91 MB
suppl.docx 2.19 MB
著者
Chen, Hongzhe School of Materials Science and Engineering, University of New South Wales Sydney
Lin, Tongxi School of Materials Science and Engineering, University of New South Wales Sydney
Ramadhan, Zeno Rizqi Electron Microscope Unit, University of New South Wales
Rawal, Aditya Mark Wainwright Analytical Centre, University of New South Wales
Nishina, Yuta Research Institute for Interdisciplinary Science, Okayama University ORCID Kaken ID publons researchmap
Karton, Amir School of Science and Technology, University of New England
Ren, Xiaojun School of Materials Science and Engineering, University of New South Wales Sydney
Joshi, Rakesh School of Materials Science and Engineering, University of New South Wales Sydney
抄録
Recent advances in membranes based on 2-dimensional (2D) materials have enabled precise control over angstrom-scale pores, providing a unique platform for studying diverse mass transport mechanisms. In this work, we systematically investigate the transport of solvent vapors through 2D channels made of graphene oxide (GO) laminates with precisely controlled oxygen content. Using in-situ chemical reduction of GO with vitamin C, we fabricated reduced GO membranes (VRGMs) with oxygen content systematically decreased from 31.6 % (pristine GO) to 24.0 % (VRGM-maximum reduction). Vapor permeability measurements showed a distinct correlation between oxygen functional groups and solvent transport behaviour. Specifically, non-polar hexane exhibits 114 % of enhanced permeance through the reduced membranes with larger graphitic domains, while the permeance of water decreases by 55 %. With the support of density functional theory (DFT) simulations, we modelled the hydrogen-bond and dispersion complexes between the solvents and GO and calculated the complexation energies. The simulation results suggest that polar molecules interact with the oxygen functional groups of GO via a hydrogen-bond network, supporting in-plane transport. In contrast, van der Waals forces drive the transport of low-polarity solvents along the graphitic domains of the 2D channel in reduced GO membranes. Our findings provide potential strategies for future design of organic solvent nanofiltration membranes.
キーワード
Graphene oxide
Organic solvent nanofiltration
発行日
2025-08
出版物タイトル
Carbon
243巻
出版者
Elsevier BV
開始ページ
120539
ISSN
0008-6223
NCID
AA00598943
資料タイプ
学術雑誌論文
言語
英語
OAI-PMH Set
岡山大学
著作権者
© 2025 The Authors.
論文のバージョン
publisher
DOI
Web of Science KeyUT
関連URL
isVersionOf https://doi.org/10.1016/j.carbon.2025.120539
ライセンス
http://creativecommons.org/licenses/by/4.0/