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2024-04-02

2024-07-15 20:44浏览数:76

Biomimetic Design of 3D Fe3O4/V-EVOH Fiber-Based Self-FloatingComposite

Aerogel to Enhance Solar Steam GenerationPerformance

An interfacial solar steam generation evaporator for seawaterdesalination has attracted extensive interest in recent years. Nevertheless,challenges still remain in relatively low evaporation rate, unsatisfactory energyconversion efffciency, and salt accumulation. Herein, we have demonstrated abiomimetic bilayer composite aerogel consisting of bottom hydrophilic andvertically aligned EVOH channels and an upper hydrophobic conical Fe3O4array. Thanks to the design merits, the 3D Fe3O4/V-EVOH evaporatorexhibits a high evaporation rate of 2.446 kg m2 h1 and an impressive solarenergy conversion efffciency of 165.5% under 1 sun illumination, which issuperior to those of state-of-the-art evaporators reported so far. Moreover, theasymmetrical wettability not only allows the evaporator to self-ffoat on thewater but also facilitates the salt ion diffusion in the channels; thus,the evaporator shows

no salt crystals on its surface and only a 6%decrease in evaporation performance even after the salt concentration increases from 0 to 10.0 wt %.

0234a7e537e0c312cd8c82b3b7ede79.png

Wu Y, Li S, Yan K, et al. Biomimetic Design of 3D Fe3O4/V-EVOH Fiber-Based Self-Floating CompositeAerogel to Enhance Solar Steam

Generation Performance[J]. Nano Letters, 2024, 24(15): 4537-4545.

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