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Article: Low-tortuosity water microchannels boosting energy utilization for high water flux solar distillation

TitleLow-tortuosity water microchannels boosting energy utilization for high water flux solar distillation
Authors
KeywordsDistillation
Evaporation
Chemical structure
Particulate matter
Solar energy
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. 8, p. 5150-5158 How to Cite?
AbstractSolar distillation through photothermal evaporators has approached solar light energy (E1) limit under no solar concentration but still suffers from modest vapor and clean water production. Herein, a nature-inspired low-tortuosity three-dimensional (3D) evaporator is demonstrated to significantly improve water production. The solar evaporator, prepared from polypyrrole-modified maize straw (PMS), had upright vascular structures enabling high water lifting and horizontal microgaps facilitating broad water distribution to the out-surface. Consequently, this novel PMS evaporator dramatically enhanced the utilization of the solar heat energy stored in the environment (E2) for promoting evaporation. The maximum vapor generation rate of a single PMS respectively increases 2.5 and 6 times compared with the conventional 3D evaporators and the planar evaporators of an identical occupied area. Consequently, a scaled-up PMS array achieved a state-of-the-art vapor generation rate of 3.0 L m–2 h–1 (LMH) under a simulated condition and a record-high clean water production of 2.2 LMH for actual seawater desalination under natural conditions (1 sun intensity). This breakthrough reveals great potentials for cost-effective freshwater production as well as the rational design of high-performance photothermal evaporators for solar distillation.
Persistent Identifierhttp://hdl.handle.net/10722/284488
ISSN
2020 Impact Factor: 9.028
2015 SCImago Journal Rankings: 2.664
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorXu, Y-
dc.contributor.authorTang, C-
dc.contributor.authorMa, J-
dc.contributor.authorLiu, D-
dc.contributor.authorQi, D-
dc.contributor.authorYou, S-
dc.contributor.authorCui, F-
dc.contributor.authorWei, Y-
dc.contributor.authorWang, W-
dc.date.accessioned2020-08-07T08:58:22Z-
dc.date.available2020-08-07T08:58:22Z-
dc.date.issued2020-
dc.identifier.citationEnvironmental Science & Technology, 2020, v. 54 n. 8, p. 5150-5158-
dc.identifier.issn0013-936X-
dc.identifier.urihttp://hdl.handle.net/10722/284488-
dc.description.abstractSolar distillation through photothermal evaporators has approached solar light energy (E1) limit under no solar concentration but still suffers from modest vapor and clean water production. Herein, a nature-inspired low-tortuosity three-dimensional (3D) evaporator is demonstrated to significantly improve water production. The solar evaporator, prepared from polypyrrole-modified maize straw (PMS), had upright vascular structures enabling high water lifting and horizontal microgaps facilitating broad water distribution to the out-surface. Consequently, this novel PMS evaporator dramatically enhanced the utilization of the solar heat energy stored in the environment (E2) for promoting evaporation. The maximum vapor generation rate of a single PMS respectively increases 2.5 and 6 times compared with the conventional 3D evaporators and the planar evaporators of an identical occupied area. Consequently, a scaled-up PMS array achieved a state-of-the-art vapor generation rate of 3.0 L m–2 h–1 (LMH) under a simulated condition and a record-high clean water production of 2.2 LMH for actual seawater desalination under natural conditions (1 sun intensity). This breakthrough reveals great potentials for cost-effective freshwater production as well as the rational design of high-performance photothermal evaporators for solar distillation.-
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/abs/10.1021/acs.est.9b06072-
dc.subjectDistillation-
dc.subjectEvaporation-
dc.subjectChemical structure-
dc.subjectParticulate matter-
dc.subjectSolar energy-
dc.titleLow-tortuosity water microchannels boosting energy utilization for high water flux solar distillation-
dc.typeArticle-
dc.identifier.emailTang, C: tangc@hku.hk-
dc.identifier.authorityTang, C=rp01765-
dc.description.naturepostprint-
dc.identifier.doi10.1021/acs.est.9b06072-
dc.identifier.pmid32186176-
dc.identifier.scopuseid_2-s2.0-85083912858-
dc.identifier.hkuros312239-
dc.identifier.volume54-
dc.identifier.issue8-
dc.identifier.spage5150-
dc.identifier.epage5158-
dc.identifier.isiWOS:000527738300048-
dc.publisher.placeUnited States-
dc.identifier.issnl0013-936X-

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