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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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Article information


Submitted
01 Mar 2019
Accepted
25 Apr 2019
First published
25 Apr 2019

Energy Environ. Sci., 2019,12, 1840-1847
Article type
Communication

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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