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dc.contributor.authorAlabi, Adetunji
dc.contributor.authorCseri, Levente
dc.contributor.authorAlHajaj, Ahmed
dc.contributor.authorSzekely, Gyorgy
dc.contributor.authorBudd, Peter Martin
dc.contributor.authorZou, Linda
dc.date.accessioned2020-08-24T12:38:08Z
dc.date.available2020-08-24T12:38:08Z
dc.date.issued2020
dc.identifier.citationAlabi, A., Cseri, L., AlHajaj, A., Szekely, G., Budd, P. M., & Zou, L. (2020). Graphene–PSS/L-DOPA nanocomposite cation exchange membranes for electrodialysis desalination. Environmental Science: Nano. doi:10.1039/d0en00496k
dc.identifier.issn2051-8153
dc.identifier.issn2051-8161
dc.identifier.doi10.1039/d0en00496k
dc.identifier.urihttp://hdl.handle.net/10754/664797
dc.description.abstractThis research reports the fabrication of nanocomposite cation exchange membranes (CEMs) by incorporating negatively charged graphene-based nanomaterials into a non-charged poly(vinylidene fluoride) (PVDF) matrix using a mold-casting technique developed in-house. Graphene oxide (GO) or reduced graphene oxide (rGO) nanosheets were modified into ion exchange group carriers using a sulfonic group-bearing agent based on poly(sodium 4- styrenesulfonate)/3,4-dihydroxy-L-phenylalanine (PSS/L-DOPA) (SGO or SrGO). Such modified nanosheets provide the ion exchange capabilities in SGO/PVDF and SrGO/PVDF nanocomposite CEMs, respectively. Both nanocomposite CEMs displayed lower linear swelling ratios which are good for membrane stability. This was due to the presence of the nanomaterials which acted as pore fillers and increased the stiffness of the nanocomposite membranes. The ion exchange capacity (IEC) and permselectivity of the SGO/PVDF_45 CEMs were slightly higher than the values for the SrGO/PVDF_45 CEM. It was found that the SrGO additive increased the area resistance of the nanocomposite CEM. However, SrGO/PVDF_45 CEM demonstrated a higher current efficiency (7.5% higher than SGO/PVDF_45), which could be attributed to the improved electronic conductivity of rGO. It was found that both nanocomposite CEMs performed well in electrodialysis experiments to achieve the substantial salt removal rates, although the energy consumption results of the novel nanocomposite CEMs were higher than the conventional polymeric CEM. The above research results have successfully demonstrated the concept of fabricating nanocomposite cation exchange membranes (CEMs) for electrodialysis applications by employing negatively charged graphene-based nanomaterials as ion exchange carriers.
dc.description.sponsorshipThis manuscript is part of a research collaboration between Masdar Institute-Khalifa University and University of Manchester (SMG2016-000001). The authors acknowledge the financial support of Khalifa University, Abu Dhabi, UAE, and the University of Manchester, UK. The authors would also like to thank Aikifa Raza and Hongxia Li for assisting with water contact angle measurements; and Andreas Dubbe, Patrick Altmeier, and Rebecca Jung from PCCell GmbH (Lebacher Str. 60, 66265 Heusweiler, Germany) for electrodialysis tests.
dc.language.isoen
dc.publisherRoyal Society of Chemistry (RSC)
dc.relation.urlhttp://pubs.rsc.org/en/Content/ArticleLanding/2020/EN/D0EN00496K
dc.rightsArchived with thanks to Environmental Science: Nano
dc.titleGraphene–PSS/L-DOPA nanocomposite cation exchange membranes for electrodialysis desalination
dc.typeArticle
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentChemical Engineering Program
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.identifier.journalEnvironmental Science: Nano
dc.rights.embargodate2021-08-19
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Civil Infrastructure and Environmental Engineering, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, United Arab Emirates
dc.contributor.institutionDepartment of Chemical Engineering and Analytical Science, University of Manchester, The Mill, Sackville Street, Manchester, M1 3BB, United Kingdom
dc.contributor.institutionDepartment of Chemical Engineering, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, United Arab Emirates
dc.contributor.institutionDepartment of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
pubs.publication-statusAccepted
kaust.personSzekely, Gyorgy
refterms.dateFOA2020-08-24T12:38:09Z


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