Water transport through graphene oxide membranes: the roles of driving forces
Water transport through graphene oxide membranes: the roles of driving forces
Graphene oxide (GO) membranes have shown excellent selectivities in nanofiltration and pervaporation. However, the water transport mechanisms in the unique membrane laminar structure are still not well understood, especially in pervaporation which involves selective permeation and evaporation. Herein, water transport in GO membranes was tested under two different modes: pressure-driven permeation and pervaporation. The pure water flux was found to be 1-2 orders of magnitude higher in pervaporation due to the large capillary pressure induced by evaporation. The water flux in pervaporation was suggested to be limited by evaporation at room temperature but surface diffusion at high temperature.
2554-2557
Chong, J. Y.
2f9ead94-86f2-4e20-9e67-75f10759555b
Wang, B.
55cee5a5-fd5f-4109-bc4d-06ee5e49e99f
Li, K.
0f88a8e1-2691-46af-acb0-7176c79f5aa7
Chong, J. Y.
2f9ead94-86f2-4e20-9e67-75f10759555b
Wang, B.
55cee5a5-fd5f-4109-bc4d-06ee5e49e99f
Li, K.
0f88a8e1-2691-46af-acb0-7176c79f5aa7
Chong, J. Y., Wang, B. and Li, K.
(2018)
Water transport through graphene oxide membranes: the roles of driving forces.
Chemical Communications, 54 (20), .
(doi:10.1039/c7cc09120f).
Abstract
Graphene oxide (GO) membranes have shown excellent selectivities in nanofiltration and pervaporation. However, the water transport mechanisms in the unique membrane laminar structure are still not well understood, especially in pervaporation which involves selective permeation and evaporation. Herein, water transport in GO membranes was tested under two different modes: pressure-driven permeation and pervaporation. The pure water flux was found to be 1-2 orders of magnitude higher in pervaporation due to the large capillary pressure induced by evaporation. The water flux in pervaporation was suggested to be limited by evaporation at room temperature but surface diffusion at high temperature.
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Accepted/In Press date: 11 January 2018
e-pub ahead of print date: 21 February 2018
Additional Information:
Funding Information:
The authors gratefully acknowledge the research funding provided by the EPSRC in the United Kingdom (Grant no. EP/M022250/1).
Publisher Copyright:
© 2018 The Royal Society of Chemistry.
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Local EPrints ID: 486378
URI: http://eprints.soton.ac.uk/id/eprint/486378
ISSN: 1359-7345
PURE UUID: 2f1c7e3c-4e66-43a8-b9ae-e4be4519d42a
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Date deposited: 18 Jan 2024 19:26
Last modified: 18 Mar 2024 04:18
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Author:
J. Y. Chong
Author:
B. Wang
Author:
K. Li
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