Membranes with a dual structure constituted of titania, zirconia, and both as thin-film selective layers coating the polyacrylonitrile platform

Three novel thin-film composite (TFC) nanofiltration membranes are prepared using an ultrafiltration membrane (UFM) of organic polymer resin polyacrylonitrile followed by a mineralization process. The UFM was hydrolyzed (H-UFM) and then transferred in dopamine (DA) and tris buffer (TRIS) solutions....

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Autores principales:	Chabi N. Worou, Zhonglin Chen
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	eds membrane nanoparticles salt rejection sem thin-film composite Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/e21399ea0e614cc4ae3ac90d204a5ad0
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spelling	oai:doaj.org-article:e21399ea0e614cc4ae3ac90d204a5ad02021-11-05T17:03:12ZMembranes with a dual structure constituted of titania, zirconia, and both as thin-film selective layers coating the polyacrylonitrile platform2709-80282709-803610.2166/aqua.2021.147https://doaj.org/article/e21399ea0e614cc4ae3ac90d204a5ad02021-05-01T00:00:00Zhttp://aqua.iwaponline.com/content/70/3/303https://doaj.org/toc/2709-8028https://doaj.org/toc/2709-8036Three novel thin-film composite (TFC) nanofiltration membranes are prepared using an ultrafiltration membrane (UFM) of organic polymer resin polyacrylonitrile followed by a mineralization process. The UFM was hydrolyzed (H-UFM) and then transferred in dopamine (DA) and tris buffer (TRIS) solutions. DA–TRIS coating is further favorable for the growth of nanoparticles (NPs), titania (TiO2), and zirconia (ZrO2) on membrane piece surface. A scanning electron microscope (SEM) was combined with an energy-dispersive spectrometer (EDS) in order to provide important insights into the arrangement and potential functions of NPs, due to their unambiguous chemical signal, for possible characterization and modification of materials at the atomic scale. Depending on whether the top layer is made of TiO2, ZrO2, or both, the membranes are called, respectively, TFC-NFTitan, TFC-NFZircon, and TFC-NFTitanZircon. The three membranes under the optimized preparation conditions (30 °C, 12 h of hydrolysis time, and operating pressure of 0.6 MPa) exhibited high rejection and permeation performance. TFC-NFTitanZircon showed the highest rejection (89–95%) for divalent cations with the salt rejection sequence of , while the permeate flux is not less than . All three membranes demonstrated long-term durability under 120-h testing. HIGHLIGHTS Thin-film composite nanofiltration membrane (NFM) for salt rejection.; Novel in situ NFM fabrication using the insights provided by a scanning electron microscope combined with an energy-dispersive spectrometer on the arrangement and potential functions of nanoparticles.; Modification of an ultrafiltration membrane to the NFM for salt removal.; Organic–inorganic NF preparation using a mineralization process.;Chabi N. WorouZhonglin ChenIWA Publishingarticleedsmembranenanoparticlessalt rejectionsemthin-film compositeEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENAqua, Vol 70, Iss 3, Pp 303-316 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	eds membrane nanoparticles salt rejection sem thin-film composite Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
spellingShingle	eds membrane nanoparticles salt rejection sem thin-film composite Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Chabi N. Worou Zhonglin Chen Membranes with a dual structure constituted of titania, zirconia, and both as thin-film selective layers coating the polyacrylonitrile platform
description	Three novel thin-film composite (TFC) nanofiltration membranes are prepared using an ultrafiltration membrane (UFM) of organic polymer resin polyacrylonitrile followed by a mineralization process. The UFM was hydrolyzed (H-UFM) and then transferred in dopamine (DA) and tris buffer (TRIS) solutions. DA–TRIS coating is further favorable for the growth of nanoparticles (NPs), titania (TiO2), and zirconia (ZrO2) on membrane piece surface. A scanning electron microscope (SEM) was combined with an energy-dispersive spectrometer (EDS) in order to provide important insights into the arrangement and potential functions of NPs, due to their unambiguous chemical signal, for possible characterization and modification of materials at the atomic scale. Depending on whether the top layer is made of TiO2, ZrO2, or both, the membranes are called, respectively, TFC-NFTitan, TFC-NFZircon, and TFC-NFTitanZircon. The three membranes under the optimized preparation conditions (30 °C, 12 h of hydrolysis time, and operating pressure of 0.6 MPa) exhibited high rejection and permeation performance. TFC-NFTitanZircon showed the highest rejection (89–95%) for divalent cations with the salt rejection sequence of , while the permeate flux is not less than . All three membranes demonstrated long-term durability under 120-h testing. HIGHLIGHTS Thin-film composite nanofiltration membrane (NFM) for salt rejection.; Novel in situ NFM fabrication using the insights provided by a scanning electron microscope combined with an energy-dispersive spectrometer on the arrangement and potential functions of nanoparticles.; Modification of an ultrafiltration membrane to the NFM for salt removal.; Organic–inorganic NF preparation using a mineralization process.;
format	article
author	Chabi N. Worou Zhonglin Chen
author_facet	Chabi N. Worou Zhonglin Chen
author_sort	Chabi N. Worou
title	Membranes with a dual structure constituted of titania, zirconia, and both as thin-film selective layers coating the polyacrylonitrile platform
title_short	Membranes with a dual structure constituted of titania, zirconia, and both as thin-film selective layers coating the polyacrylonitrile platform
title_full	Membranes with a dual structure constituted of titania, zirconia, and both as thin-film selective layers coating the polyacrylonitrile platform
title_fullStr	Membranes with a dual structure constituted of titania, zirconia, and both as thin-film selective layers coating the polyacrylonitrile platform
title_full_unstemmed	Membranes with a dual structure constituted of titania, zirconia, and both as thin-film selective layers coating the polyacrylonitrile platform
title_sort	membranes with a dual structure constituted of titania, zirconia, and both as thin-film selective layers coating the polyacrylonitrile platform
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/e21399ea0e614cc4ae3ac90d204a5ad0
work_keys_str_mv	AT chabinworou membraneswithadualstructureconstitutedoftitaniazirconiaandbothasthinfilmselectivelayerscoatingthepolyacrylonitrileplatform AT zhonglinchen membraneswithadualstructureconstitutedoftitaniazirconiaandbothasthinfilmselectivelayerscoatingthepolyacrylonitrileplatform
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Membranes with a dual structure constituted of titania, zirconia, and both as thin-film selective layers coating the polyacrylonitrile platform

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