Self-floating carbon nanotube membrane on macroporous silica substrate for highly efficient solar-driven interfacial water evaporation

Handle URI:
http://hdl.handle.net/10754/594969
Title:
Self-floating carbon nanotube membrane on macroporous silica substrate for highly efficient solar-driven interfacial water evaporation
Authors:
Wang, Yuchao; Zhang, Lianbin ( 0000-0002-8548-1506 ) ; Wang, Peng ( 0000-0003-0856-0865 )
Abstract:
Given the emerging energy and water challenges facing the mankind, solar-driven water evaporation has been gaining renewed research attention from both academia and industry as an energy efficient means of wastewater treatment and clean water production. In this project, a bi-layered material, consisting of a top self-floating hydrophobic CNT membrane and a bottom hydrophilic macroporous silica substrate, was rationally designed and fabricated for highly energy-efficient solar driven water evaporation based on the concept of interfacial heating. The top thin CNT membrane with excellent light adsorption capability, acted as photothermal component, which harvested and converted almost the entire incident light to heat for exclusively heating of interfacial water. On the other hand, the macroporous silica substrate provided multi-functions toward further improvement of operation stability and water evaporation performance of the material, including water pumping, mechanical support and heat barriers. The silica substrate was conducive in forming the rough surface structures of the CNT top layers during vacuum filtration and thus indirectly contributed to high light adsorption by the top CNT layers. With optimized thicknesses of the CNT top layer and silica substrate, a solar thermal conversion efficiency of 82 % was achieved in this study. The bi-layered material also showed great performance toward water evaporation from seawater and contaminated water, realizing the separation of water from pollutants, and indicating its application versatility.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division
Citation:
Self-floating carbon nanotube membrane on macroporous silica substrate for highly efficient solar-driven interfacial water evaporation 2016 ACS Sustainable Chemistry & Engineering
Publisher:
American Chemical Society (ACS)
Journal:
ACS Sustainable Chemistry & Engineering
Issue Date:
22-Jan-2016
DOI:
10.1021/acssuschemeng.5b01274
Type:
Article
ISSN:
2168-0485; 2168-0485
Additional Links:
http://pubs.acs.org/doi/abs/10.1021/acssuschemeng.5b01274
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorWang, Yuchaoen
dc.contributor.authorZhang, Lianbinen
dc.contributor.authorWang, Pengen
dc.date.accessioned2016-01-27T13:01:18Zen
dc.date.available2016-01-27T13:01:18Zen
dc.date.issued2016-01-22en
dc.identifier.citationSelf-floating carbon nanotube membrane on macroporous silica substrate for highly efficient solar-driven interfacial water evaporation 2016 ACS Sustainable Chemistry & Engineeringen
dc.identifier.issn2168-0485en
dc.identifier.issn2168-0485en
dc.identifier.doi10.1021/acssuschemeng.5b01274en
dc.identifier.urihttp://hdl.handle.net/10754/594969en
dc.description.abstractGiven the emerging energy and water challenges facing the mankind, solar-driven water evaporation has been gaining renewed research attention from both academia and industry as an energy efficient means of wastewater treatment and clean water production. In this project, a bi-layered material, consisting of a top self-floating hydrophobic CNT membrane and a bottom hydrophilic macroporous silica substrate, was rationally designed and fabricated for highly energy-efficient solar driven water evaporation based on the concept of interfacial heating. The top thin CNT membrane with excellent light adsorption capability, acted as photothermal component, which harvested and converted almost the entire incident light to heat for exclusively heating of interfacial water. On the other hand, the macroporous silica substrate provided multi-functions toward further improvement of operation stability and water evaporation performance of the material, including water pumping, mechanical support and heat barriers. The silica substrate was conducive in forming the rough surface structures of the CNT top layers during vacuum filtration and thus indirectly contributed to high light adsorption by the top CNT layers. With optimized thicknesses of the CNT top layer and silica substrate, a solar thermal conversion efficiency of 82 % was achieved in this study. The bi-layered material also showed great performance toward water evaporation from seawater and contaminated water, realizing the separation of water from pollutants, and indicating its application versatility.en
dc.language.isoenen
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acssuschemeng.5b01274en
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Sustainable Chemistry & Engineering, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acssuschemeng.5b01274.en
dc.titleSelf-floating carbon nanotube membrane on macroporous silica substrate for highly efficient solar-driven interfacial water evaporationen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalACS Sustainable Chemistry & Engineeringen
dc.eprint.versionPost-printen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorWang, Yuchaoen
kaust.authorZhang, Lianbinen
kaust.authorWang, Pengen
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