期刊
ACS Applied Materials & Interfaces
卷 8, 期 46, 页码 31716-31721出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b11466
关键词
black titania; nanocage; light trapping; solar desalination; mesoporous; photothermal
资金
- National Key Research and Development Program [2016YFB0901600]
- NSF of China [61376056, 51502331, 51402334]
- Science and Technology Commission of Shanghai [13JC1405700, 14520722000]
Solar desalination driven by solar radiation as heat source is freely available, however, hindered by low efficiency. Herein, we first design and synthesize black titania with a unique nanocage structure simultaneously with light trapping effect to enhance light harvesting, well-crystallized interconnected nanograins to accelerate the heat transfer from titania to water and with opening mesopores (4-10 nm) to facilitate the permeation of water vapor. Furthermore, the coated self-floating black titania nanocages film localizes the temperature increase at the water air interface rather than uniformly heating the bulk of the water, which ultimately results in a solar-thermal conversion efficiency as high as 70.9% under a simulated solar light with an intensity of 1 kW m(-2) (1 sun). This finding should inspire new black materials with rationally designed structure for superior solar desalination performance.
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