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- W3207706462 abstract "• The DSSG system uses siphon-drop mode to realize self-absorbing and self-desalting. • Top-down active water supply on evaporating surface can effectively take salt away. • The DSSG system shows real-time antifouling nature, even for treating strong brine. • Our rational DSSG system features two heat sources: sunlight and warm surroundings. • The rate of 2.550 kg m –2 h −1 is steady when desalinating 20% NaCl brine for 168 h. Direct solar steam generation (DSSG) is well-proven to be a sustainable and effective technique to provide high-quality freshwater supply. However, it customarily suffers from severe salt accumulation, especially for treating strong brine, becoming a fatal bottleneck for approaching its commercial applications. Herein, we developed a DSSG with potent siphon-drop mode to achieve powerful self-absorbing and self-desalting, in which the 3D cone-shaped self-supporting polydopamine and polyethyleneimine co -coated poly(acrylonitrile-styrene-acrylate) (PDA-PEI@ASA) used as photothermal material (PTM). Source water can be spontaneously and continuously pumped to the top of water-evaporating surface of PTM via strong siphon effect, and the top-down active water diffusion on evaporating surface can effectively take the salts away from the system. Such above features give the DSSG real-time antifouling nature and hence address the fatal issue of salt accumulation. Accordingly, when continuously treating a near-saturated brine (20% NaCl) for at least 168 h, no obvious salts deposition can be found with a steady water evaporation rate of ∼2.550 kg m –2 h −1 . This work could help shed novel light on the design of practical DSSG systems toward efficient lasting freshwater extraction, holding great promise for global water scarcity." @default.
- W3207706462 created "2021-10-25" @default.
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- W3207706462 date "2022-02-01" @default.
- W3207706462 modified "2023-10-09" @default.
- W3207706462 title "High-rate long-lasting solar desalination towards hypersaline brine enabled by introducing a siphon-drop mode" @default.
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- W3207706462 doi "https://doi.org/10.1016/j.cej.2021.133043" @default.
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