Scalable Superhydrophilic Solar Evaporators for Long‐Term Stable Desalination, Fresh Water Collection and Salt Collection by Vertical Salt Deposition

Scalable Superhydrophilic Solar Evaporators for Long‐Term Stable Desalination, Fresh Water Collection and Salt Collection by Vertical Salt Deposition

Solar‐driven interfacial evaporation (SIE) is very promising to solve the issue of fresh water shortage, however, poor salt resistance severely hinders long‐term stable SIE and fresh water collection. Here, we report design of superhydrophilic solar evaporators for long‐term stable desalination, fre...

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Bibliographic Details
Published in:ChemSusChem Vol. 17; no. 14; pp. e202400111 - n/a
Main Authors: Huang, Xiaopeng P., Li, Lingxiao X., Chen, Kai, Zhang, Junping P.
Format: Journal Article
Language:English
Published: Germany Wiley Subscription Services, Inc 22-07-2024
Subjects:
Brines
Collection
Deposition
Desalination
Evaporation rate
Evaporators
Fresh water
Gold
Hydrophilicity
Microfibers
Photothermal
Polypyrroles
Seawater desalination
Silicone nanofilaments
Solar-driven interfacial evaporation
Superhydrophobic
Water quality
Water shortages
Superhydrophobic
Photothermal
Seawater desalination
Solar-driven interfacial evaporation
Silicone nanofilaments
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Summary:Solar‐driven interfacial evaporation (SIE) is very promising to solve the issue of fresh water shortage, however, poor salt resistance severely hinders long‐term stable SIE and fresh water collection. Here, we report design of superhydrophilic solar evaporators for long‐term stable desalination, fresh water collection and salt collection by vertical salt deposition. The evaporators are prepared by sequentially deposition of silicone nanofilaments, polypyrrole and Au nanoparticles on a polyester fabric composed of microfibers. The evaporators feature excellent photothermal effect and ultrafast water transport, due to their unique micro‐/nanostructure and superhydrophilicity. As a result, during SIE the salt gradually deposits vertically rather than occupies larger area on the evaporators. Consequently, long‐term stable SIE with high evaporation rates of 2.4–2.1 kg m−2 h−1 for 3.5–20 wt % brine in continuous 10 h is achieved under 1 sun illumination. Meanwhile, the loosely deposited salt can be easily collected, realizing zero brine discharge. Moreover, scalable preparation of the evaporator is achieved, which exhibits efficient collection of high quality fresh water (10.08 kg m−2 in 8 h) via SIE desalination under weak natural sunlight (0.46~0.66 sun). This strategy sheds a new light on the design of high‐performance solar evaporators and their real‐world fresh water collection. Scalable superhydrophilic solar evaporators with excellent photothermal effect, unique micro‐/nanostructure and ultrafast water transport are prepared by sequentially deposition of silicone nanofilaments, polypyrrole and Au nanoparticles on a polyester fabric. Salt deposits vertically on the evaporators during solar interfacial evaporation. Thus, long‐term stable desalination, fresh water collection and salt collection are realized by the evaporators.
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ISSN:1864-5631
1864-564X
1864-564X
DOI:10.1002/cssc.202400111