期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 3, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202114074
关键词
elasticity; interconnectivity; porous hydrogels; solar water purification; template synthesis
资金
- UT Energy Institute
- Camille-Dreyfus Teacher-Scholar Award
- Welch Foundation [F-1319]
- Sloan Research Fellowship
The study introduces a method called self-assembled templating (SAT) to fabricate large-scale elastic hydrogel evaporators with excellent desalination performance. The highly interconnected porous structure and superior elasticity of the hydrogels enable stable and efficient evaporation, providing new possibilities for future water treatment applications.
Interfacial evaporation using porous hydrogels has demonstrated highly effective solar evaporation performance under natural sunlight to ensure an affordable clean water supply. However, it remains challenging to realize scalable and ready-to-use hydrogel materials with durable mechanical properties. Here, self-assembled templating (SAT) is developed as a simple yet effective method to fabricate large-scale elastic hydrogel evaporators with excellent desalination performance. The highly interconnected porous structure of the hydrogels with low tortuosity and tunable pore size enables high level of tunability on the water transport rate. With superior elasticity, the porous hydrogels are easy to process with a rapid shape recovery after being rolled, folded, and twisted over hundred times, and exhibit highly effective and stable evaporation with an evaporation rate of approximate to 2.8 kg m(-2) h(-1) and approximate to 90 % solar-to-vapor efficiency. It is anticipated that this SAT strategy, without the typical need for freeze-drying, will accelerate the industrialization of hydrogel solar evaporators for practical applications.
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