Chemically Cross-Linked Graphene Oxide as a Selective Layer on Electrospun Polyvinyl Alcohol Nanofiber Membrane for Nanofiltration Application

Graphene oxide (GO) nanosheets were utilized as a selective layer on a highly porous polyvinyl alcohol (PVA) nanofiber support via a pressure-assisted self-assembly technique to synthesize composite nanofiltration membranes. The GO layer was rendered stable by cross-linking the nanosheets (GO-to-GO)...

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Autores principales:	Myoung Jun Park, Grace M. Nisola, Dong Han Seo, Chen Wang, Sherub Phuntsho, Youngwoo Choo, Wook-Jin Chung, Ho Kyong Shon
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	graphene oxide nanofiber electrospinning polyvinyl alcohol cross-linking nanofiltration Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/f7af1715673a4d9285abc3afe0bdf642
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spelling	oai:doaj.org-article:f7af1715673a4d9285abc3afe0bdf6422021-11-25T18:30:29ZChemically Cross-Linked Graphene Oxide as a Selective Layer on Electrospun Polyvinyl Alcohol Nanofiber Membrane for Nanofiltration Application10.3390/nano111128672079-4991https://doaj.org/article/f7af1715673a4d9285abc3afe0bdf6422021-10-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/2867https://doaj.org/toc/2079-4991Graphene oxide (GO) nanosheets were utilized as a selective layer on a highly porous polyvinyl alcohol (PVA) nanofiber support via a pressure-assisted self-assembly technique to synthesize composite nanofiltration membranes. The GO layer was rendered stable by cross-linking the nanosheets (GO-to-GO) and by linking them onto the support surface (GO-to-PVA) using glutaraldehyde (GA). The amounts of GO and GA deposited on the PVA substrate were varied to determine the optimum nanofiltration membrane both in terms of water flux and salt rejection performances. The successful GA cross-linking of GO interlayers and GO-PVA via acetalization was confirmed by FTIR and XPS analyses, which corroborated with other characterization results from contact angle and zeta potential measurements. Morphologies of the most effective membrane (CGOPVA-50) featured a defect-free GA cross-linked GO layer with a thickness of ~67 nm. The best solute rejections of the CGOPVA-50 membrane were 91.01% for Na<sub>2</sub>SO<sub>4</sub> (20 mM), 98.12% for Eosin Y (10 mg/L), 76.92% for Methylene blue (10 mg/L), and 49.62% for NaCl (20 mM). These findings may provide one of the promising approaches in synthesizing mechanically stable GO-based thin-film composite membranes that are effective for solute separation via nanofiltration.Myoung Jun ParkGrace M. NisolaDong Han SeoChen WangSherub PhuntshoYoungwoo ChooWook-Jin ChungHo Kyong ShonMDPI AGarticlegraphene oxidenanofiberelectrospinningpolyvinyl alcoholcross-linkingnanofiltrationChemistryQD1-999ENNanomaterials, Vol 11, Iss 2867, p 2867 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	graphene oxide nanofiber electrospinning polyvinyl alcohol cross-linking nanofiltration Chemistry QD1-999
spellingShingle	graphene oxide nanofiber electrospinning polyvinyl alcohol cross-linking nanofiltration Chemistry QD1-999 Myoung Jun Park Grace M. Nisola Dong Han Seo Chen Wang Sherub Phuntsho Youngwoo Choo Wook-Jin Chung Ho Kyong Shon Chemically Cross-Linked Graphene Oxide as a Selective Layer on Electrospun Polyvinyl Alcohol Nanofiber Membrane for Nanofiltration Application
description	Graphene oxide (GO) nanosheets were utilized as a selective layer on a highly porous polyvinyl alcohol (PVA) nanofiber support via a pressure-assisted self-assembly technique to synthesize composite nanofiltration membranes. The GO layer was rendered stable by cross-linking the nanosheets (GO-to-GO) and by linking them onto the support surface (GO-to-PVA) using glutaraldehyde (GA). The amounts of GO and GA deposited on the PVA substrate were varied to determine the optimum nanofiltration membrane both in terms of water flux and salt rejection performances. The successful GA cross-linking of GO interlayers and GO-PVA via acetalization was confirmed by FTIR and XPS analyses, which corroborated with other characterization results from contact angle and zeta potential measurements. Morphologies of the most effective membrane (CGOPVA-50) featured a defect-free GA cross-linked GO layer with a thickness of ~67 nm. The best solute rejections of the CGOPVA-50 membrane were 91.01% for Na<sub>2</sub>SO<sub>4</sub> (20 mM), 98.12% for Eosin Y (10 mg/L), 76.92% for Methylene blue (10 mg/L), and 49.62% for NaCl (20 mM). These findings may provide one of the promising approaches in synthesizing mechanically stable GO-based thin-film composite membranes that are effective for solute separation via nanofiltration.
format	article
author	Myoung Jun Park Grace M. Nisola Dong Han Seo Chen Wang Sherub Phuntsho Youngwoo Choo Wook-Jin Chung Ho Kyong Shon
author_facet	Myoung Jun Park Grace M. Nisola Dong Han Seo Chen Wang Sherub Phuntsho Youngwoo Choo Wook-Jin Chung Ho Kyong Shon
author_sort	Myoung Jun Park
title	Chemically Cross-Linked Graphene Oxide as a Selective Layer on Electrospun Polyvinyl Alcohol Nanofiber Membrane for Nanofiltration Application
title_short	Chemically Cross-Linked Graphene Oxide as a Selective Layer on Electrospun Polyvinyl Alcohol Nanofiber Membrane for Nanofiltration Application
title_full	Chemically Cross-Linked Graphene Oxide as a Selective Layer on Electrospun Polyvinyl Alcohol Nanofiber Membrane for Nanofiltration Application
title_fullStr	Chemically Cross-Linked Graphene Oxide as a Selective Layer on Electrospun Polyvinyl Alcohol Nanofiber Membrane for Nanofiltration Application
title_full_unstemmed	Chemically Cross-Linked Graphene Oxide as a Selective Layer on Electrospun Polyvinyl Alcohol Nanofiber Membrane for Nanofiltration Application
title_sort	chemically cross-linked graphene oxide as a selective layer on electrospun polyvinyl alcohol nanofiber membrane for nanofiltration application
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/f7af1715673a4d9285abc3afe0bdf642
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Chemically Cross-Linked Graphene Oxide as a Selective Layer on Electrospun Polyvinyl Alcohol Nanofiber Membrane for Nanofiltration Application

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