Please use this identifier to cite or link to this item: https://doi.org/10.1039/c7nr07193k
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dc.titleA graphene-like membrane with an ultrahigh water flux for desalination
dc.contributor.authorYan, YG
dc.contributor.authorWang, WS
dc.contributor.authorLi, W
dc.contributor.authorLoh, KP
dc.contributor.authorZhang, J
dc.date.accessioned2020-07-21T01:18:26Z
dc.date.available2020-07-21T01:18:26Z
dc.date.issued2017-12-21
dc.identifier.citationYan, YG, Wang, WS, Li, W, Loh, KP, Zhang, J (2017-12-21). A graphene-like membrane with an ultrahigh water flux for desalination. NANOSCALE 9 (47) : 18951-18958. ScholarBank@NUS Repository. https://doi.org/10.1039/c7nr07193k
dc.identifier.issn20403364
dc.identifier.issn20403372
dc.identifier.urihttps://scholarbank.nus.edu.sg/handle/10635/171625
dc.description.abstract© 2017 The Royal Society of Chemistry. An ultrathin nanoporous membrane which combines high water permeability and high salt rejection is the core of ultrafiltration technology. Recently, we reported the synthesis of a chemically robust and nanoporous two-dimensional conjugated aromatic polymer (2D-CAP) membrane. Due to its array of highly regular sub-nanometer pores and channels, the ultrathin 2D-CAP membrane can be potentially used in desalination. Herein, we used molecular dynamics simulations to analyze the transmembrane hydrodynamics of mono- and multi-layer 2D-CAP membranes as a function of layer number. The energy barriers to water and ions across these membranes were calculated to evaluate the potential of 2D-CAP to function as the ultimate RO membrane. Our simulation results show that the bilayer CAP membrane exhibits superior ion rejection (100%) and a water flux (1172 L m-2 h-1 bar-1) with a performance that is three orders of magnitude higher than the commercial reverse osmosis membrane, which is three times higher than the theoretically reported monolayer nanoporous MoS2 membrane (the state-of-the-art membrane reported for desalination). In addition, the 2D-CAP bilayer membrane is highly resistant to swelling even at a high water flux. The monolayer 2D-CAP membrane shows good ion selectivity between monovalent and divalent ions.
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.sourceElements
dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectTechnology
dc.subjectChemistry, Multidisciplinary
dc.subjectNanoscience & Nanotechnology
dc.subjectMaterials Science, Multidisciplinary
dc.subjectPhysics, Applied
dc.subjectChemistry
dc.subjectScience & Technology - Other Topics
dc.subjectMaterials Science
dc.subjectPhysics
dc.subjectCARBON NANOTUBE MEMBRANES
dc.subjectSINGLE-LAYER GRAPHENE
dc.subjectNANOPOROUS GRAPHENE
dc.subjectMONOLAYER GRAPHENE
dc.subjectPOROUS GRAPHENE
dc.subjectVACANCY DEFECTS
dc.subjectTRANSPORT
dc.subjectTECHNOLOGY
dc.subjectMECHANISMS
dc.subjectPERMEATION
dc.typeArticle
dc.date.updated2020-05-31T14:04:14Z
dc.contributor.departmentCHEMISTRY
dc.description.doi10.1039/c7nr07193k
dc.description.sourcetitleNANOSCALE
dc.description.volume9
dc.description.issue47
dc.description.page18951-18958
dc.published.statePublished
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