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Article: Engineering a Nanocomposite Interlayer for a Novel Ceramic-Based Forward Osmosis Membrane with Enhanced Performance

TitleEngineering a Nanocomposite Interlayer for a Novel Ceramic-Based Forward Osmosis Membrane with Enhanced Performance
Authors
KeywordsCarbon nanotubes
Membranes
Nanocomposites
Oxide minerals
Pore size
Issue Date2020
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/esthag
Citation
Environmental Science & Technology, 2020, v. 54 n. 12, p. 7715-7724 How to Cite?
AbstractRational design of a high-performance defect-free polyamide (PA) layer on a robust ceramic substrate is challenging for forward osmosis (FO) water treatment applications. In this study, we first demonstrated a robust ceramic-based thin-film composite (TFC) FO membrane by engineering a novel nanocomposite interlayer of titanium dioxide and carbon nanotube (TiO2/CNT). The structural morphologies and properties were systematically characterized for different substrates (without interlayer, with TiO2 interlayer, or with TiO2/CNT interlayer) and the corresponding ceramic-based TFC-FO membranes. Introduction of low roughness nanocomposite interlayers with decreased pore size created an interface with improved surface characteristics, favoring the formation of a defect-free nanovoid-containing PA layer with high cross-linking degree. The resulting ceramic-based FO membrane had a water permeability of approximately 2 L/(m2 h bar) and a NaCl rejection of 98%, showing simultaneous enhancements in both compared to the control membrane without an interlayer. Mechanism analysis indicates that such a special nanocomposite interlayer not only provided more active sites for the formation of a thinner defect-free nanovoid-containing PA layer without penetration into substrate but also acted as a highly porous three-dimensional network structure for rapid water transport. This work provides a novel protocol for rational design and fabrication of a high-performance multilayered inorganic FO membrane as well as extended applications in water treatment with enhanced performance.
Persistent Identifierhttp://hdl.handle.net/10722/285076
ISSN
2020 Impact Factor: 9.028
2020 SCImago Journal Rankings: 2.851
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhang, M-
dc.contributor.authorJin, W-
dc.contributor.authorYang, F-
dc.contributor.authorDuke, M-
dc.contributor.authorDong, Y-
dc.contributor.authorTang, CY-
dc.date.accessioned2020-08-07T09:06:24Z-
dc.date.available2020-08-07T09:06:24Z-
dc.date.issued2020-
dc.identifier.citationEnvironmental Science & Technology, 2020, v. 54 n. 12, p. 7715-7724-
dc.identifier.issn0013-936X-
dc.identifier.urihttp://hdl.handle.net/10722/285076-
dc.description.abstractRational design of a high-performance defect-free polyamide (PA) layer on a robust ceramic substrate is challenging for forward osmosis (FO) water treatment applications. In this study, we first demonstrated a robust ceramic-based thin-film composite (TFC) FO membrane by engineering a novel nanocomposite interlayer of titanium dioxide and carbon nanotube (TiO2/CNT). The structural morphologies and properties were systematically characterized for different substrates (without interlayer, with TiO2 interlayer, or with TiO2/CNT interlayer) and the corresponding ceramic-based TFC-FO membranes. Introduction of low roughness nanocomposite interlayers with decreased pore size created an interface with improved surface characteristics, favoring the formation of a defect-free nanovoid-containing PA layer with high cross-linking degree. The resulting ceramic-based FO membrane had a water permeability of approximately 2 L/(m2 h bar) and a NaCl rejection of 98%, showing simultaneous enhancements in both compared to the control membrane without an interlayer. Mechanism analysis indicates that such a special nanocomposite interlayer not only provided more active sites for the formation of a thinner defect-free nanovoid-containing PA layer without penetration into substrate but also acted as a highly porous three-dimensional network structure for rapid water transport. This work provides a novel protocol for rational design and fabrication of a high-performance multilayered inorganic FO membrane as well as extended applications in water treatment with enhanced performance.-
dc.languageeng-
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/esthag-
dc.relation.ispartofEnvironmental Science & Technology-
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Environmental Science & Technology, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.est.0c02809-
dc.subjectCarbon nanotubes-
dc.subjectMembranes-
dc.subjectNanocomposites-
dc.subjectOxide minerals-
dc.subjectPore size-
dc.titleEngineering a Nanocomposite Interlayer for a Novel Ceramic-Based Forward Osmosis Membrane with Enhanced Performance-
dc.typeArticle-
dc.identifier.emailTang, CY: tangc@hku.hk-
dc.identifier.authorityTang, CY=rp01765-
dc.description.naturepostprint-
dc.identifier.doi10.1021/acs.est.0c02809-
dc.identifier.pmid32401501-
dc.identifier.scopuseid_2-s2.0-85086523427-
dc.identifier.hkuros312247-
dc.identifier.volume54-
dc.identifier.issue12-
dc.identifier.spage7715-
dc.identifier.epage7724-
dc.identifier.isiWOS:000542229600070-
dc.publisher.placeUnited States-
dc.identifier.issnl0013-936X-

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