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Article: Stable Superhydrophobic Ceramic-Based Carbon Nanotube Composite Desalination Membranes

TitleStable Superhydrophobic Ceramic-Based Carbon Nanotube Composite Desalination Membranes
Authors
Keywordscarbon nanotube
ceramic membrane
high performance
Membrane distillation
operating stability
superhydrophobicity
Issue Date2018
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/nanolett
Citation
Nano Letters, 2018, v. 18 n. 9, p. 5514-5521 How to Cite?
AbstractMembrane distillation (MD) is a promising process for the treatment of highly saline wastewaters. The central component of MD is a stable porous hydrophobic membrane with a large liquid-vapor interface for efficient water vapor transport. A key challenge for current polymeric or hydrophobically modified inorganic membranes is insufficient operating stability, resulting in some issues such as wetting, fouling, flux, and rejection decline. This study presents an overall conceptual design and application strategy for a superhydrophobic ceramic-based carbon nanotube (CNT) desalination membrane having specially designed membrane structures with unprecedented operating stability and MD performance. Superporous and superhydrophobic surface structures with CNT networks are created after quantitative regulation of in situ grown CNT. The fully covered CNT layers (FC-CNT) exhibit significantly improved thermally and superhydrophobically stable properties under an accelerated stability test. Due to the distinctive structure of the superporous surface network, providing a large liquid-vapor superhydrophobic interface and interior finger-like macrovoids, the FC-CNT membrane exhibits a stable high flux with a 99.9% rejection of Na+, outperforming existing inorganic membranes. Under simple and nondestructive electrochemically assisted direct contact MD (e-DCMD), enhanced antifouling performance is observed. The design strategy is broadly applicable to be extended toward fabrication of high performance membranes derived from other ceramic or inorganic substrates and additional applications in wastewater and gas treatment. © 2018 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/264044
ISSN
2019 Impact Factor: 11.238
2015 SCImago Journal Rankings: 9.006
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorDong, Y-
dc.contributor.authorMa, L-
dc.contributor.authorTang, C-
dc.contributor.authorYang, F-
dc.contributor.authorQuan, X-
dc.contributor.authorJassby, D-
dc.contributor.authorZaworotko, MJ-
dc.contributor.authorGuiver, MD-
dc.date.accessioned2018-10-22T07:48:37Z-
dc.date.available2018-10-22T07:48:37Z-
dc.date.issued2018-
dc.identifier.citationNano Letters, 2018, v. 18 n. 9, p. 5514-5521-
dc.identifier.issn1530-6984-
dc.identifier.urihttp://hdl.handle.net/10722/264044-
dc.description.abstractMembrane distillation (MD) is a promising process for the treatment of highly saline wastewaters. The central component of MD is a stable porous hydrophobic membrane with a large liquid-vapor interface for efficient water vapor transport. A key challenge for current polymeric or hydrophobically modified inorganic membranes is insufficient operating stability, resulting in some issues such as wetting, fouling, flux, and rejection decline. This study presents an overall conceptual design and application strategy for a superhydrophobic ceramic-based carbon nanotube (CNT) desalination membrane having specially designed membrane structures with unprecedented operating stability and MD performance. Superporous and superhydrophobic surface structures with CNT networks are created after quantitative regulation of in situ grown CNT. The fully covered CNT layers (FC-CNT) exhibit significantly improved thermally and superhydrophobically stable properties under an accelerated stability test. Due to the distinctive structure of the superporous surface network, providing a large liquid-vapor superhydrophobic interface and interior finger-like macrovoids, the FC-CNT membrane exhibits a stable high flux with a 99.9% rejection of Na+, outperforming existing inorganic membranes. Under simple and nondestructive electrochemically assisted direct contact MD (e-DCMD), enhanced antifouling performance is observed. The design strategy is broadly applicable to be extended toward fabrication of high performance membranes derived from other ceramic or inorganic substrates and additional applications in wastewater and gas treatment. © 2018 American Chemical Society.-
dc.languageeng-
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/nanolett-
dc.relation.ispartofNano Letters-
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in [JournalTitle], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://pubs.acs.org/page/policy/articlesonrequest/index.html].-
dc.subjectcarbon nanotube-
dc.subjectceramic membrane-
dc.subjecthigh performance-
dc.subjectMembrane distillation-
dc.subjectoperating stability-
dc.subjectsuperhydrophobicity-
dc.titleStable Superhydrophobic Ceramic-Based Carbon Nanotube Composite Desalination Membranes-
dc.typeArticle-
dc.identifier.emailTang, C: tangc@hku.hk-
dc.identifier.authorityTang, C=rp01765-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/acs.nanolett.8b01907-
dc.identifier.scopuseid_2-s2.0-85052332085-
dc.identifier.hkuros295725-
dc.identifier.volume18-
dc.identifier.issue9-
dc.identifier.spage5514-
dc.identifier.epage5521-
dc.identifier.isiWOS:000444793500024-
dc.publisher.placeUnited States-

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