Monolithic all-weather solar-thermal interfacial membrane evaporator
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(Published version)
Date
2022
Authors
Zhang, J.
Li, Z.
Meng, T.
Zang, S.
Yang, C.
Luo, X.
Wang, H.
Chen, J.
Jing, F.
Wang, C.
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Journal article
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Chemical Engineering Journal, 2022; 450(137893)
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Abstract
Salt blocking and low evaporation efficiency under weak sun irradiation are two obstacles of solar-thermal seawater desalination in the industrialization process. Herein, the challenges are overcome by a solar-thermal interfacial membrane evaporation (STIME) system, i.e., combining merits of advanced thermal management of interfacial evaporation and salt insulation of membrane evaporation, simultaneously achieving salt-resistance, hydrovoltaic generation, and all-weather vapor generation. By employing a hybrid system based on sandwich -like MXene-graphene oxide-MXene (MGM) on a commercial PVDF membrane (MGM@PVDF), we achieved an evaporation efficiency up to 92.5% and without any salt accumulation for 10 h at 10 wt% NaCl solution. Moreover, the system can also be driven by Joule-heating effect for water evaporation under dark or cloudy conditions
The maximum evaporation rate of this system driven by sunlight (0.5 sun) and electricity (36 V) can reach 10.5 kg m -2h- 1. Apart from water evaporation, the MGM@PVDF modules possess excellent molecular sieve effect and can pretreat dye pollution before desalination. Furthermore, the MGM@PVDF also exhibits excellent anti-bacterial effect and biocompatibility, ensuring ecological balance during real-world applications. Thus, the developed STIME system provides a novel avenue for all-weather steam generation to constantly provide safe drinking water.
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Data source: supplementary data, https://doi.org/10.1016/j.cej.2022.137893
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Copyright 2022 Elsevier B.V. A
Access Condition Notes: Accepted manuscript available after 1 July 2024