期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 9, 期 28, 页码 15776-15786出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ta03335b
关键词
-
资金
- National Natural Science Foundation of China [21875147]
A synergic strategy for solar vapor generation using PDA-t as the basic unit has been developed, which can simultaneously promote all the sub-processes and achieve high efficiency. Floating PDA-t based evaporators have good long-term durability and excellent water purification performance for brine and sewage.
Capturing sunlight directly and converting it to heat energy to facilitate water evaporation offers an opportunity to produce freshwater in an energy saving and environmentally benign manner. Solar vapor generation (SVG) is a complex process, which could be divided into four major sub-processes, i.e. photothermal transformation, thermal transmission, water transportation and water evaporation. Therefore, the biggest challenge to achieve high efficient SVG is the synergic integration of these sub-processes. Herein, an all-in-one synergic strategy for SVG considering all the above sub-processes has been developed using polydopamine nanotubes (PDA-t) as the basic unit. Owing to the intrinsic nature and hollow nanotube morphology, PDA-t can simultaneously and synergistically promote all the sub-processes of SVG, resulting in high SVG rates up to 2.5-3.6 kg m(-2) h(-1) with different exposure heights above water under 1 sun. Furthermore, floating PDA-t based evaporators have good long-term durability and excellent water purification performance for brine and sewage.
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