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Issue 6, 2019
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Spatially isolating salt crystallisation from water evaporation for continuous solar steam generation and salt harvesting

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Abstract

As a low-cost green technology, solar steam generation using nanostructured photothermal materials has been drawing increasing attention in various applications, e.g. seawater desalination, and zero liquid discharge of industrial wastewater. However, the crystallisation of salts on the surface of photothermal materials during steam generation leads to a gradual decline in the water evaporation rate. Herein, this challenge was overcome by a novel design involving controlled water transport, edge-preferential crystallisation and gravity-assisted salt harvesting. The crystallisation sites of the salt were spatially isolated from the water evaporation surface, achieving continuous steam generation and salt harvesting in over 600 hours of non-stop operation. The study provides new insights into the design of solar steam generators and advances their applications in sustainable seawater desalination and wastewater management.

Graphical abstract: Spatially isolating salt crystallisation from water evaporation for continuous solar steam generation and salt harvesting

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Publication details

The article was received on 01 Mar 2019, accepted on 25 Apr 2019 and first published on 25 Apr 2019


Article type: Communication
DOI: 10.1039/C9EE00692C
Energy Environ. Sci., 2019,12, 1840-1847

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    Spatially isolating salt crystallisation from water evaporation for continuous solar steam generation and salt harvesting

    Y. Xia, Q. Hou, H. Jubaer, Y. Li, Y. Kang, S. Yuan, H. Liu, M. W. Woo, L. Zhang, L. Gao, H. Wang and X. Zhang, Energy Environ. Sci., 2019, 12, 1840
    DOI: 10.1039/C9EE00692C

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