期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 52, 页码 19041-19046出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201911457
关键词
capillary water transport; reduced graphene oxide (rGO) foam; solar steam generation; thermal efficiency; water purification
资金
- National Key RAMP
- D Program of China [2016YFA0200200, 2017YFB1104300]
- NSFC [51673026, 21671020, 51433005]
- Beijing Natural Science Foundation [2172049]
- NSFC-STINT [21911530143]
- NSFC-MAECI [51861135202]
Solar-driven interfacial water evaporation yield is severely limited by the low efficiency of solar thermal energy. Herein, the injection control technique (ICT) achieves a capillary water state in rGO foam and effectively adjusts the water motion mode therein. Forming an appropriate amount of capillary water in the 3D graphene foam can greatly increase the vapor escape channel, by ensuring that the micrometer-sized pore channels do not become completely blocked by water and by exposing as much evaporation area as possible while preventing solar heat from being used to heat excess water. The rate of solar steam generation can reach up to 2.40kgm(-2)h(-1) under solar illumination of 1kWm(-2), among the best values reported. In addition, solar thermal efficiency approaching 100% is achieved. This work enhances solar water-evaporation performance and promotes the application of solar-driven evaporation systems made of carbon-based materials.
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