期刊
ADVANCED ENERGY MATERIALS
卷 8, 期 16, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201702149
关键词
carbon sponges; electricity generation; interfacial heating; photothermic vaporization; solar water evaporation
类别
资金
- Singapore Ministry of National Development
- National Research Foundation, Prime Minister's Office under the Land and Liveability National Innovation Challenge (L2 NIC) Research Programme (L2 NIC) [L2NICCFP2-2015-3]
Solar vaporization has received tremendous attention for its potential in desalination, sterilization, distillation, etc. However, a few major roadblocks toward practical application are the high cost, process intensive, fragility of solar absorber materials, and low efficiency. Herein an inexpensive cellular carbon sponge that has a broadband light absorption and inbuilt structural features to perform solitary heat localization for in situ photothermic vaporization is reported. The defining advantages of elastic cellular porous sponge are that it self-confines water to the perpetually hot spots and accommodates cyclical dynamic fluid flow-volume variable stress for practical usage. By isolating from bulk water, the solar-to-vapor conversion efficiency is increased by 2.5-fold, surpassing that of conventional bulk heating. Notably, complementary solar steam generation-induced electricity can be harvested during the solar vaporization so as to capitalize on waste heat. Such solar distillation and waste heat-to-electricity generation functions may provide potential opportunities for on-site electricity and fresh water production for remote areas/emergency needs.
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