Scalable Graphene-Based Membranes for Ionic Sieving with Ultrahigh Charge Selectivity

Página do item simplificado
dc.contributor.authorHong S.
dc.contributor.authorConstans C.
dc.contributor.authorSurmani Martins M.V.
dc.contributor.authorSeow Y.C.
dc.contributor.authorGuevara Carrio J.A.
dc.contributor.authorGaraj S.
dc.date.accessioned2024-03-13T00:49:57Z
dc.date.available2024-03-13T00:49:57Z
dc.date.issued2017
dc.description.abstract© 2016 American Chemical Society.Nanostructured graphene-oxide (GO) laminate membranes, exhibiting ultrahigh water flux, are excellent candidates for next generation nanofiltration and desalination membranes, provided the ionic rejection could be further increased without compromising the water flux. Using microscopic drift-diffusion experiments, we demonstrated the ultrahigh charge selectivity for GO membranes, with more than order of magnitude difference in the permeabilities of cationic and anionic species of equivalent hydration radii. Measuring diffusion of a wide range of ions of different size and charge, we were able to clearly disentangle different physical mechanisms contributing to the ionic sieving in GO membranes: electrostatic repulsion between ions and charged chemical groups; and the compression of the ionic hydration shell within the membrane's nanochannels, following the activated behavior. The charge-selectivity allows us to rationally design membranes with increased ionic rejection and opens up the field of ion exchange and electrodialysis to the GO membranes.
dc.description.firstpage728
dc.description.issuenumber2
dc.description.lastpage732
dc.description.volume17
dc.identifier.doi10.1021/acs.nanolett.6b03837
dc.identifier.issn1530-6992
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/35789
dc.relation.ispartofNano Letters
dc.rightsAcesso Restrito
dc.subject.otherlanguageGraphene oxide membranes
dc.subject.otherlanguageion exchange
dc.subject.otherlanguageionic permeability
dc.subject.otherlanguageionic sieving
dc.subject.otherlanguagesurface charges
dc.titleScalable Graphene-Based Membranes for Ionic Sieving with Ultrahigh Charge Selectivity
dc.typeArtigo
local.scopus.citations168
local.scopus.eid2-s2.0-85012004948
local.scopus.subjectDesalination membranes
local.scopus.subjectDrift diffusion
local.scopus.subjectElectrostatic repulsion
local.scopus.subjectGraphene oxides
local.scopus.subjectIonic hydration
local.scopus.subjectIonic permeability
local.scopus.subjectionic sieving
local.scopus.subjectPhysical mechanism
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85012004948&origin=inward
Arquivos
Coleções
Artigos de periódico