Janus Evaporators with Self-Recovering Hydrophobicity for Salt-Rejecting Interfacial Solar Desalination

被引:239
作者
Chen, Jinxing [1 ,2 ]
Yin, Jessica Lujia [1 ]
Li, Bo [1 ]
Ye, Zuyang [1 ]
Liu, Dilong [1 ]
Ding, Deng [3 ]
Qian, Fang [4 ]
Myung, Nosang Vincent [3 ]
Zhang, Qiao [2 ]
Yin, Yadong [1 ]
机构
[1] Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA
[2] Soochow Univ, Inst Funct Nano & Soft Mat, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Jiangsu, Peoples R China
[3] Univ Calif Riverside, Dept Chem & Environm Engn, Riverside, CA 92521 USA
[4] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA 94550 USA
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
steam generation; solar thermal; self-recovering hydrophobicity; interfid cial evaporation; salt resistance; EFFICIENT; GENERATION; OXIDE; SUN;
D O I
10.1021/acsnano.0c07677
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The recent advancements in interfacial evaporation of salty water using renewable solar energy provide one of the promising pathways to solve worldwide water scarcity. Pursuing a stable evaporation rate of water has been the central focus of this field, as it is directly related to the throughput, while salt deposition on the evaporator becomes a critical issue. Although Janus-structured evaporators with an upper hydrophobic layer and a bottom hydrophilic layer have been demonstrated as an effective way to suppress the salt precipitation, the hydrophobic upper layer, achieved usually by some special organic groups, suffers from a photochemical oxidation when exposed to oxidative chemicals in water and high-energy light, resulting in a deteriorated surface hydrophobicity. Here, we report our design of an efficient salt-rejecting Janus evaporator by taking advantage of the self-recovering surface hydrophobicity of poly(dimethylsiloxane) (PDMS) against photochemical damages, which ensures a long-term surface hydrophobicity. With its upper layer partially covered with PDMS, the Janus evaporator demonstrates an excellent salt rejection capability and exhibits a stable evaporation rate of 1.38 kg.m(-2).h(-1) under 1 sun illumination for 400 min of continuous operation, or 90 d of intermittent work. By combining the advantages of high structural integration, long-term salt-rejection, and efficient evaporation, our Janus evaporator holds great promise for the stable production of clean water from seawater.
引用
收藏
页码:17419 / 17427
页数:9
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