气凝胶
复合数
材料科学
复合材料
纤维
纳米技术
化学工程
光电子学
工程类
作者
Yi Wu,Shanshan Li,Kai Yan,Ming Xia,Qin Cheng,Jia Xu,Shan He,Xinlin Zha,Dong Wang,Limin Wu
出处
期刊:Nano Letters
[American Chemical Society]
日期:2024-04-03
标识
DOI:10.1021/acs.nanolett.4c00572
摘要
An interfacial solar steam generation evaporator for seawater desalination has attracted extensive interest in recent years. Nevertheless, challenges still remain in relatively low evaporation rate, unsatisfactory energy conversion efficiency, and salt accumulation. Herein, we have demonstrated a biomimetic bilayer composite aerogel consisting of bottom hydrophilic and vertically aligned EVOH channels and an upper hydrophobic conical Fe3O4 array. Thanks to the design merits, the 3D Fe3O4/V-EVOH evaporator exhibits a high evaporation rate of ∼2.446 kg m-2 h-1 and an impressive solar energy conversion efficiency of ∼165.5% under 1 sun illumination, which is superior to those of state-of-the-art evaporators reported so far. Moreover, the asymmetrical wettability not only allows the evaporator to self-float on the water 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 %.
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