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Alkyl Chain Grafted-Reduced Graphene Oxide Membrane for Effective Separation of Water/Alcohol Miscible Mixtures

Separation of water/alcohol miscible mixtures via direct filtration only under gravity is a great challenge. Here, different alkyl chain grafted-reduced graphene oxide (alkyl-RGO) is synthesized and characterized. The hydrophobic alkyl chains can considerably modify the oil-wettability of the membra...

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Autores principales: Zhang, Hailong, Yang, Jianbo, Li, Ting, Ji, Xingxiang, Xu, Zhen, Zhu, Yaling, Liu, Libin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7744741/
https://www.ncbi.nlm.nih.gov/pubmed/33344418
http://dx.doi.org/10.3389/fchem.2020.598562
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author Zhang, Hailong
Yang, Jianbo
Li, Ting
Ji, Xingxiang
Xu, Zhen
Zhu, Yaling
Liu, Libin
author_facet Zhang, Hailong
Yang, Jianbo
Li, Ting
Ji, Xingxiang
Xu, Zhen
Zhu, Yaling
Liu, Libin
author_sort Zhang, Hailong
collection PubMed
description Separation of water/alcohol miscible mixtures via direct filtration only under gravity is a great challenge. Here, different alkyl chain grafted-reduced graphene oxide (alkyl-RGO) is synthesized and characterized. The hydrophobic alkyl chains can considerably modify the oil-wettability of the membranes and avoid water permeation. The alkyl-RGO membrane obtained by vacuum filtration can separate water/oil immiscible mixtures. Importantly, water/alcohol miscible mixtures could also be separated solely under gravity, where alcohols efficiently permeate the alkyl-RGO membrane while water is prevented through the membrane. The separation efficiency of C(12)H-RGO membrane reaches up to about 0.04 vol% of water content for the case of separating an n-propanol/water (90:10 v/v) mixture with high n-propanol permeability of approx. 685 mL m(−2) h(−1). Molecular simulations indicate that the selective absorption ability and diffusion rate also affect water/alcohol separation. The alkyl-RGO membranes via gravity driven filtration can extend the applications of separation of water/alcohol miscible mixtures.
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spelling pubmed-77447412020-12-18 Alkyl Chain Grafted-Reduced Graphene Oxide Membrane for Effective Separation of Water/Alcohol Miscible Mixtures Zhang, Hailong Yang, Jianbo Li, Ting Ji, Xingxiang Xu, Zhen Zhu, Yaling Liu, Libin Front Chem Chemistry Separation of water/alcohol miscible mixtures via direct filtration only under gravity is a great challenge. Here, different alkyl chain grafted-reduced graphene oxide (alkyl-RGO) is synthesized and characterized. The hydrophobic alkyl chains can considerably modify the oil-wettability of the membranes and avoid water permeation. The alkyl-RGO membrane obtained by vacuum filtration can separate water/oil immiscible mixtures. Importantly, water/alcohol miscible mixtures could also be separated solely under gravity, where alcohols efficiently permeate the alkyl-RGO membrane while water is prevented through the membrane. The separation efficiency of C(12)H-RGO membrane reaches up to about 0.04 vol% of water content for the case of separating an n-propanol/water (90:10 v/v) mixture with high n-propanol permeability of approx. 685 mL m(−2) h(−1). Molecular simulations indicate that the selective absorption ability and diffusion rate also affect water/alcohol separation. The alkyl-RGO membranes via gravity driven filtration can extend the applications of separation of water/alcohol miscible mixtures. Frontiers Media S.A. 2020-12-03 /pmc/articles/PMC7744741/ /pubmed/33344418 http://dx.doi.org/10.3389/fchem.2020.598562 Text en Copyright © 2020 Zhang, Yang, Li, Ji, Xu, Zhu and Liu. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Chemistry
Zhang, Hailong
Yang, Jianbo
Li, Ting
Ji, Xingxiang
Xu, Zhen
Zhu, Yaling
Liu, Libin
Alkyl Chain Grafted-Reduced Graphene Oxide Membrane for Effective Separation of Water/Alcohol Miscible Mixtures
title Alkyl Chain Grafted-Reduced Graphene Oxide Membrane for Effective Separation of Water/Alcohol Miscible Mixtures
title_full Alkyl Chain Grafted-Reduced Graphene Oxide Membrane for Effective Separation of Water/Alcohol Miscible Mixtures
title_fullStr Alkyl Chain Grafted-Reduced Graphene Oxide Membrane for Effective Separation of Water/Alcohol Miscible Mixtures
title_full_unstemmed Alkyl Chain Grafted-Reduced Graphene Oxide Membrane for Effective Separation of Water/Alcohol Miscible Mixtures
title_short Alkyl Chain Grafted-Reduced Graphene Oxide Membrane for Effective Separation of Water/Alcohol Miscible Mixtures
title_sort alkyl chain grafted-reduced graphene oxide membrane for effective separation of water/alcohol miscible mixtures
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7744741/
https://www.ncbi.nlm.nih.gov/pubmed/33344418
http://dx.doi.org/10.3389/fchem.2020.598562
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