期刊
SUSTAINABLE ENERGY & FUELS
卷 2, 期 12, 页码 2762-2769出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8se00402a
关键词
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资金
- U.S. National Science Foundation [DMR-1609061]
- National Key R&D Program of China [2016YFB0300704]
- State Key Development Program for Basic Research of China [2014CB643306]
- NSF of Shanghai [17ZR1440900]
- National Nature Science Foundation of China [51602195]
- Doctoral Innovation Foundation of SMU [2016ycx037]
- Doctoral Excellent Thesis Project Foundation of SMU [2017BXLP005]
The increasing energy and environmental concerns have spurred enormous research interest towards developing various renewable energy and sustainable environmental solutions. Photothermal conversion for interfacial solar vapor generation is a promising, green energy technology and efficient route for desalination and purification of seawater, i.e. for those parts where freshwater shortage is a severe concern and clean energy is not available. Eco-friendly, highly efficient and low-cost interfacial evaporators are highly desirable for the practical and widespread application of this technology. In this work, we have demonstrated a novel interfacial evaporator employing Cu9S5 nanonets with heterogeneous hexagonal holes as the photothermal conversion material and a microporous poly(vinylidene fluoride) membrane (PVDFM) as the supporting material. The Cu9S5/PVDFM evaporator displays a broadband (from 250 to 2000 nm) and large (approximate to 91.7%) solar absorptance. The porous structures of Cu9S5 nanonets and PVDFM facilitate the water transportation, and the large optical absorption of Cu9S5/PVDFM converts most of the solar energy to thermal energy, producing water vapor with high efficiency. The Cu9S5/PVDFM evaporator exhibits solar vapor generation efficiencies of 80.2 +/- 0.6% and 91.5 +/- 1.1% under one-sun and four-sun irradiation, respectively, making it among the best copper sulphide-based solar evaporators reported so far. This Cu9S5/PVDFM evaporator is reusable, flexible, highly efficient, easy to prepare, easy to scale up, and controllable for tailoring, showing a promising future for interfacial solar vapor generation.
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