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Article: Highly Selective Transport of Alkali Metal Ions by Nanochannels of Polyelectrolyte Threaded MIL-53 Metal Organic Framework

TitleHighly Selective Transport of Alkali Metal Ions by Nanochannels of Polyelectrolyte Threaded MIL-53 Metal Organic Framework
Authors
KeywordsMetal Organic Framework
MOF Membrane
nanochannels
Selective Ion Transport
in situ polymerization
Issue Date2019
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/nanolett
Citation
Nano Letters, 2019, v. 19 n. 8, p. 4990-4996 How to Cite?
AbstractConventional ion-exchange polymeric membranes have limited selectivity due to their nonuniform and unstable structures. The rigid, regular, high porosity of metal organic framework (MOF) generally provides MOF membrane with exclusion/sieving effect but lack of electrostatic screening. Here we report for the first time a nonbiological highly selective MOF membrane with polyelectrolyte threaded in the nanochannel of metal organic framework (polyelectrolyte∼MOF) and its selective transport of alkali metal cations. Poly(sodium vinyl sulfonated-co-acrylic acid)∼MIL-53(Al) is prepared on anodic aluminum oxide substrate via steps of MOF MIL-53(Al) growth followed by in situ polymerization. The poly(VS-co-AA)∼MIL-53(Al) membrane demonstrates highly specific selectivity in transport of alkali metal cations. Rate of ion transport correlates inversely with the hydrated diameter of the ion reaching a low limiting rate near 0.7 nm hydrated diameter. Charge exclusion is demonstrated with blockage of anion transport under a concentration gradient. The highly uniform porous nanostructure of MOF and ionic function of polyelectrolyte offers the MOF membrane with synergistic selectivity based on exclusion forces of the framework and Coulomb forces from fixed charges of polyelectrolytes in nanochannels.
Persistent Identifierhttp://hdl.handle.net/10722/272846
ISSN
2017 Impact Factor: 12.08
2015 SCImago Journal Rankings: 9.006

 

DC FieldValueLanguage
dc.contributor.authorGao, L-
dc.contributor.authorChan, KY-
dc.contributor.authorLi, CY-
dc.contributor.authorXie, L-
dc.contributor.authorOlorunyomi, JF-
dc.date.accessioned2019-08-06T09:17:41Z-
dc.date.available2019-08-06T09:17:41Z-
dc.date.issued2019-
dc.identifier.citationNano Letters, 2019, v. 19 n. 8, p. 4990-4996-
dc.identifier.issn1530-6984-
dc.identifier.urihttp://hdl.handle.net/10722/272846-
dc.description.abstractConventional ion-exchange polymeric membranes have limited selectivity due to their nonuniform and unstable structures. The rigid, regular, high porosity of metal organic framework (MOF) generally provides MOF membrane with exclusion/sieving effect but lack of electrostatic screening. Here we report for the first time a nonbiological highly selective MOF membrane with polyelectrolyte threaded in the nanochannel of metal organic framework (polyelectrolyte∼MOF) and its selective transport of alkali metal cations. Poly(sodium vinyl sulfonated-co-acrylic acid)∼MIL-53(Al) is prepared on anodic aluminum oxide substrate via steps of MOF MIL-53(Al) growth followed by in situ polymerization. The poly(VS-co-AA)∼MIL-53(Al) membrane demonstrates highly specific selectivity in transport of alkali metal cations. Rate of ion transport correlates inversely with the hydrated diameter of the ion reaching a low limiting rate near 0.7 nm hydrated diameter. Charge exclusion is demonstrated with blockage of anion transport under a concentration gradient. The highly uniform porous nanostructure of MOF and ionic function of polyelectrolyte offers the MOF membrane with synergistic selectivity based on exclusion forces of the framework and Coulomb forces from fixed charges of polyelectrolytes in nanochannels.-
dc.languageeng-
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/nanolett-
dc.relation.ispartofNano Letters-
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in [JournalTitle], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://pubs.acs.org/page/policy/articlesonrequest/index.html].-
dc.subjectMetal Organic Framework-
dc.subjectMOF Membrane-
dc.subjectnanochannels-
dc.subjectSelective Ion Transport-
dc.subjectin situ polymerization-
dc.titleHighly Selective Transport of Alkali Metal Ions by Nanochannels of Polyelectrolyte Threaded MIL-53 Metal Organic Framework-
dc.typeArticle-
dc.identifier.emailGao, L: liang2@hku.hk-
dc.identifier.emailChan, KY: hrsccky@hku.hk-
dc.identifier.emailLi, CY: cyvli@hku.hk-
dc.identifier.authorityChan, KY=rp00662-
dc.identifier.authorityLi, CY=rp02122-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/acs.nanolett.9b01211-
dc.identifier.pmid31322897-
dc.identifier.scopuseid_2-s2.0-85070681215-
dc.identifier.hkuros300704-
dc.identifier.volume19-
dc.identifier.issue8-
dc.identifier.spage4990-
dc.identifier.epage4996-
dc.publisher.placeUnited States-

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