Journal
ACS APPLIED ENERGY MATERIALS
Volume 5, Issue 10, Pages 13031-13041Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.2c02728
Keywords
solar interfacial evaporation; silicone nanofilaments; photothermal; wettability; attapulgite
Funding
- National Natural Science Foundation of China [51873220, 22105213]
- Youth Innovation Promotion Association of CAS [2022426]
- West Light Foundation of CAS
- Natural Science Foundation of Gansu Province [21JR7RA080]
- LICP Cooperation Foundation for Young Scholars [HZJJ21-03]
- Lanzhou Innovation and Entrepreneurship Project [2021-RC-20]
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Solar-driven interfacial evaporation (SIE) is a promising method for seawater desalination. Two-dimensional water-transport structures (2D-WTS) can enhance SIE performance but suffer from poor salt resistance. Inspired by transpiration in plant leaves, researchers have developed a 2D-WTS with controllable morphology, allowing for fast water supply and long-term efficient SIE.
Solar-driven interfacial evaporation (SIE) has drawn increasing attention for seawater desalination. Two-dimensional water-transport structures (2D-WTS) can enhance SIE performance by reducing heat loss of conventional evaporators but suffer from poor salt resistance due to insufficient water supply, which inhibits vapor escape and thus reduces evaporation rate. Inspired by the transpiration of plant leaves, we report the design of a 2DWTS with controllable morphology by growing silicone nanofilaments on a polyethylene/polypropylene fabric. 2D-WTS has a hierarchical micro-/nanostructure for fast water supply like the multiscale vascular system of leaves. Consequently, the separated solar evaporator composed of 2D-WTS and polypyrrole/ attapulgite@aluminium photothermal sheet achieves long-term efficient SIE, i.e., high evaporation rate (2.23 kg m-2 h-1, 3.5 wt % NaCl(aq), 1 sun), stable SIE of concentrated brine over 10 days (& SIM;2.10 kg m-2 h-1, 10 wt % NaCl(aq), 7 h irradiation per day, 1 sun), and high practical evaporation rate of 7.36 kg m-2 during 7 h outdoor SIE under weak sunlight and low temperature (0.3-0.6 sun, 2-13 ?). This is because fast water transport in 2D-WTS forms a small salt deposition area close to the edge of the horizontal area of 2D-WTS during long-term SIE, which hardly affects the vapor escape.
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