Journal
CELL REPORTS PHYSICAL SCIENCE
Volume 1, Issue 6, Pages -Publisher
CELL PRESS
DOI: 10.1016/j.xcrp.2020.100074
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Funding
- National Natural Science Foundation of China [51732011, 21431006, 21503207]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [21521001]
- Users with Excellence and Scientific Research Grant of Hefei Science Center of CAS [2015HSC-UE007]
- Key Research Program of Frontier Sciences, CAS [QYZDJ-SSW-SLH036]
- Fundamental Research Funds for the Central Universities [WK6030000077, WK6030000127]
- CAS Pioneer Hundred Talents Program
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Solar thermal conversion (STC) evaporation is a practical and sustainable technology for seawater desalination and sewage abatement. However, both the limited evaporation efficiency and long-term conversion stability restrain its practical application. Herein, a lotus morphology-inspired biomimetic evaporator (MBE) with Janus wettability and bimodal pores is well designed for high-rate and enduring STC evaporation. Just like lotus leaves, the hydrophobic surface of the MBE cuts off the capillarity of water, hence achieving high-efficient salt resistance and solar absorption, while the hydrophilic substance provides fast water transportation. The bimodal-pore structures formed by incorporating lotus root-like mesopores into the 3D truss-like macropores effectively decrease density and thermal conductivity for self-floating and thermal regulation. This results in a low water vaporization enthalpy of 1846 J g(-1), leading to a much higher evaporation rate at the same conversion efficiency. This work may open new avenues for developing high-performance evaporation systems.
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