期刊
NANO ENERGY
卷 53, 期 -, 页码 425-431出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2018.08.067
关键词
Plasmonic; Cu nanodots; Graphene; Copper carbodiimide; Solar desalination
类别
资金
- National Key Research and Development Program [2016YFB0901600]
- NSF of China [61376056, 11404358]
- Science and Technology Commission of Shanghai [16JC1401700, 14520722000]
Black materials are the key to convert solar light to thermal energy, but it is not easy to economically achieve full solar-spectrum light absorption and maximally harvest solar energy. Herein, we develop a popcorn approach based on a space-confined pyrolysis of copper carbodiimide to synthesis Cu nanodot-embedded N-doped graphene urchins. In situ formed Cu nanodots are rigidly fixed and spatially scaffolded in the graphene matrix, achieving nearly full-spectrum solar light absorption (99%) over a wide spectral range (300-1800 nm). Such a highly efficient solar harvest is endowed by an intensively hybridized localized surface plasmon resonance and stabilized by graphene matrix. When applied in solar desalination, the N-doped graphene urchins provide structural interconnectivity and freeway for water transports and enable the as-formed plasmonic absorber to naturally self-float on water. By localizing the absorbed energy at the interfaces, efficient (similar to 82%) and stable desalination is ultimately achieved under a simulated solar light. Practically, a solar desalination system of the plasmonic absorber can produce fresh water with a rate of similar to 5 L m(-2) day(-1) under solar irradiation.
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