Ultrathin metal-mesh Janus membranes with nanostructure-enhanced hydrophobicity for high-efficiency fog harvesting
Fog harvesting has been reckoned to be one of the most facile and economical approaches to alleviating the everincreasing global water scarcity. Janus membranes, especially metallic ones, outperform other fog collectors in terms of fog harvesting efficiencies, and they are the selection for sustainable water production as passive devices. However, there is a lack of metallic Janus membranes with ultrasmall feature sizes due to the limitation of the laser ablation fabrication method, which restrains parameter optimization for highly efficient fog collectors. In this work, photolithography, electroplating, and nanoimprint lithography processes are employed to enable ultrasmall membrane thickness and nanopatterning on the membrane surface. A 4-mu m-thick ultrathin hierarchical metal-mesh Janus membrane with a pitch of 60 mu m is fabricated, which achieves a record-high water collection rate of 233 mg cm(-2).min(-1) with nanostructure-enhanced hydrophobicity. The morphology of the membrane is characterized by scanning electron microscopy, while the fog collection process is observed under a high-speed camera and a microscope. Experimental measurement and finite-element numerical modeling unveil that a smaller membrane thickness and a more hydrophobic water-collecting surface contribute to higher water collection rates by accelerating water transport and reducing water re-evaporation.
General Research Fund of the Research Grants Council of the Hong Kong Special Administrative Region["17205421","17204420","17209320","17210319","17207419","17204718"] ; 5G Frontier Project of Nanshan, Shenzhen, China[K20799112] ; University of Hong Kong["202011159235","202010160046"]
|WOS Research Area|
Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology
Green & Sustainable Science & Technology ; Engineering, Environmental ; Environmental Sciences
|WOS Accession No|
|EI Accession Number|
Efficiency ; Harvesting ; High speed cameras ; Hydrophobicity ; Membranes ; Metals ; Morphology ; Nanoimprint lithography ; Scanning electron microscopy ; Water conservation
|ESI Classification Code|
Water Resources:444 ; Photographic Equipment:742.2 ; Reproduction, Copying:745.2 ; Nanotechnology:761 ; Agricultural Methods:821.3 ; Production Engineering:913.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Solid State Physics:933 ; Materials Science:951
Web of Science
Cited Times [WOS]:0
|Document Type||Journal Article|
|Department||SUSTech Institute of Microelectronics|
1.Department of Mechanical Engineering,University of Hong Kong,Hong Kong,China
2.School of Microelectronics,Southern University of Science and Technology,Shenzhen,China
3.Department of Materials Science and Engineering,College of Engineering and Applied Sciences,Nanjing University,Nanjing,China
Chen，Liyang,Li，Wei,Gan，Zhuofei,et al. Ultrathin metal-mesh Janus membranes with nanostructure-enhanced hydrophobicity for high-efficiency fog harvesting[J]. Journal of Cleaner Production,2022,363.
Chen，Liyang.,Li，Wei.,Gan，Zhuofei.,Zhou，Yaya.,Chen，Ming.,...&Li，Wen Di.(2022).Ultrathin metal-mesh Janus membranes with nanostructure-enhanced hydrophobicity for high-efficiency fog harvesting.Journal of Cleaner Production,363.
Chen，Liyang,et al."Ultrathin metal-mesh Janus membranes with nanostructure-enhanced hydrophobicity for high-efficiency fog harvesting".Journal of Cleaner Production 363(2022).
|Files in This Item:||There are no files associated with this item.|
|Recommend this item|
|Export to Endnote|
|Export to Excel|
|Export to Csv|
|Similar articles in Google Scholar|
|Similar articles in Baidu Scholar|
|Similar articles in Bing Scholar|
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.