Journal
NANOTECHNOLOGY
Volume 30, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aae678
Keywords
Cu nanoparticles; photothermal conversion; solar steam generation
Funding
- National Natural Science Foundation of China [11604155, 11674239, 51702379]
- China Postdoctoral Science Foundation [2016M600428, 2017T100386]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1601023A]
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Solar steam generation provides a renewable and environmentally friendly approach to solve the water shortage issue. The pursuit of efficient, stable, and cheap photothermal agents is thus of great significance. In this work, Cu nanoparticles (NPs) fabricated simply by a substitution reaction, exhibit a near-unity (similar to 97.7%) light absorption, covering a broad incident angle and wavelength range (200-1300 nm). Thereby, a high photothermal conversion efficiency of 93% is achieved. The excellent photothermal performance offers a unique opportunity for the development of solar steam generation. By coating the Cu NPs on a cellulose membrane, a solar steam generation efficiency up to 73% is acquired at a low irradiation power density of 2 kW m(-2) (1 kW m(-2) = 1 sun). Moreover, the Cu NPs are recyclable with the high stability being resistant to heat, photoirradiation and corrosion of brine.
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