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Article: Functionalized graphene oxide modified polyethersulfone membranes for low-pressure anionic dye/salt fractionation

TitleFunctionalized graphene oxide modified polyethersulfone membranes for low-pressure anionic dye/salt fractionation
Authors
Issue Date2018
PublisherMDPI AG. The Journal's web site is located at http://www.mdpi.com/journal/polymers
Citation
Polymers, 2018, v. 10 n. 7, article no. 795 How to Cite?
AbstractIn this study, polyelectrolyte assembled functionalized graphene oxide (PE-GO) membranes were fabricated through a one-step charge facilitated deposition method for high performance dye/salt separation. According to the intercalation of polydopamine (PDA) and (ionic liquid) IL functional moieties into the GO membranes, the pore size of the resulted PE-pGO and PE-iGO membrane increased from 2.69 nm to 4.13 nm and 6.54 nm, respectively. Correspondingly, a pure water flux of 13.8 ± 2.2, 36.7 ± 3.4, and 52.1 ± 6.7 L m-1 h-1 bar-1 was achieved for PE-GO, PE-pGO and PE-iGO membrane, respectively. PE-iGO membrane with the largest pore size could be operated with significant water permeability (28.3 to 38.3 Lm-1 h-1 bar-1) at a low operating pressure range of 0.5-2 bar (dye concentration = 100 ppm, salt concentration = 5 g/L). More importantly, functionalities introduced to the GO nanosheets are found to impact the dye adsorption to the membrane surface. The IL intercalation promotes the elution of dye molecules from the IL moieties at elevated pH, therefore enhancing the efficiency of alkaline washing of the membrane. By contrast, the intercalation of PDA weakens such efficiency due to its strong adhesion force to the dye molecules even at the alkaline condition. © 2018 by the authors.
Persistent Identifierhttp://hdl.handle.net/10722/264040
ISSN
2017 Impact Factor: 2.935
2015 SCImago Journal Rankings: 0.917
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLiu, L-
dc.contributor.authorXie, X-
dc.contributor.authorZambare, R-
dc.contributor.authorSelvaraj, A-
dc.contributor.authorSowrirajalu, B-
dc.contributor.authorSong, X-
dc.contributor.authorTang, C-
dc.contributor.authorGao, C-
dc.date.accessioned2018-10-22T07:48:34Z-
dc.date.available2018-10-22T07:48:34Z-
dc.date.issued2018-
dc.identifier.citationPolymers, 2018, v. 10 n. 7, article no. 795-
dc.identifier.issn2073-4360-
dc.identifier.urihttp://hdl.handle.net/10722/264040-
dc.description.abstractIn this study, polyelectrolyte assembled functionalized graphene oxide (PE-GO) membranes were fabricated through a one-step charge facilitated deposition method for high performance dye/salt separation. According to the intercalation of polydopamine (PDA) and (ionic liquid) IL functional moieties into the GO membranes, the pore size of the resulted PE-pGO and PE-iGO membrane increased from 2.69 nm to 4.13 nm and 6.54 nm, respectively. Correspondingly, a pure water flux of 13.8 ± 2.2, 36.7 ± 3.4, and 52.1 ± 6.7 L m-1 h-1 bar-1 was achieved for PE-GO, PE-pGO and PE-iGO membrane, respectively. PE-iGO membrane with the largest pore size could be operated with significant water permeability (28.3 to 38.3 Lm-1 h-1 bar-1) at a low operating pressure range of 0.5-2 bar (dye concentration = 100 ppm, salt concentration = 5 g/L). More importantly, functionalities introduced to the GO nanosheets are found to impact the dye adsorption to the membrane surface. The IL intercalation promotes the elution of dye molecules from the IL moieties at elevated pH, therefore enhancing the efficiency of alkaline washing of the membrane. By contrast, the intercalation of PDA weakens such efficiency due to its strong adhesion force to the dye molecules even at the alkaline condition. © 2018 by the authors.-
dc.languageeng-
dc.publisherMDPI AG. The Journal's web site is located at http://www.mdpi.com/journal/polymers-
dc.relation.ispartofPolymers-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleFunctionalized graphene oxide modified polyethersulfone membranes for low-pressure anionic dye/salt fractionation-
dc.typeArticle-
dc.identifier.emailTang, C: tangc@hku.hk-
dc.identifier.authorityTang, C=rp01765-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.3390/polym10070795-
dc.identifier.scopuseid_2-s2.0-85050456469-
dc.identifier.hkuros295719-
dc.identifier.volume10-
dc.identifier.issue7-
dc.identifier.spagearticle no. 795-
dc.identifier.epagearticle no. 795-
dc.identifier.isiWOS:000442528400106-
dc.publisher.placeSwitzerland-

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