Low-Tortuosity Water Microchannels Boosting Energy Utilization for High Water Flux Solar Distillation
In: Environmental Science & Technology, Jg. 54 (2020-03-18), S. 5150-5158
Online
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Zugriff:
Solar distillation through photothermal evaporators has approached solar light energy (E1) limit under no solar concentration but still suffers from modest vapor and clean water production. Herein, a nature-inspired low-tortuosity three-dimensional (3D) evaporator is demonstrated to significantly improve water production. The solar evaporator, prepared from polypyrrole-modified maize straw (PMS), had upright vascular structures enabling high water lifting and horizontal microgaps facilitating broad water distribution to the out-surface. Consequently, this novel PMS evaporator dramatically enhanced the utilization of the solar heat energy stored in the environment (E2) for promoting evaporation. The maximum vapor generation rate of a single PMS respectively increases 2.5 and 6 times compared with the conventional 3D evaporators and the planar evaporators of an identical occupied area. Consequently, a scaled-up PMS array achieved a state-of-the-art vapor generation rate of 3.0 L m-2 h-1 (LMH) under a simulated condition and a record-high clean water production of 2.2 LMH for actual seawater desalination under natural conditions (1 sun intensity). This breakthrough reveals great potentials for cost-effective freshwater production as well as the rational design of high-performance photothermal evaporators for solar distillation.
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Low-Tortuosity Water Microchannels Boosting Energy Utilization for High Water Flux Solar Distillation
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Autor/in / Beteiligte Person: | Qi, Dianpeng ; Cui, Fuyi ; Wang, Wei ; You, Shijie ; Wei, Yen ; Xu, Ying ; Ma, Jiaxiang ; Tang, Chuyang Y. ; Liu, Dongqing |
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Zeitschrift: | Environmental Science & Technology, Jg. 54 (2020-03-18), S. 5150-5158 |
Veröffentlichung: | American Chemical Society (ACS), 2020 |
Medientyp: | unknown |
ISSN: | 1520-5851 (print) ; 0013-936X (print) |
DOI: | 10.1021/acs.est.9b06072 |
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