A Diode-like Scalable Asymmetric Solar Evaporator with Ultra-high Salt Resistance

Yawei Yang; Haixiang Feng; Wenxiu QueYu QiuYunqi LiLin GuoQing Li

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A Diode-like Scalable Asymmetric Solar Evaporator with Ultra-high Salt Resistance

机译：A Diode-like Scalable Asymmetric Solar Evaporator with Ultra-high Salt Resistance

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Passive solar-driven interfacial evaporation is an environmental-friendlyapproach for seawater desalination. However, non-volatile salts usually precipitateon the evaporator surface during evaporation, significantly reducingthe evaporation rate and blocking the evaporator. Although several strategieshave been proposed for this issue, they are usually only effective under lowsalinity conditions and natural solar irradiation. In this study, a scalable solarevaporator is proposed, which is expediently fabricated by carbonizing thecommercially available coconut fiber cloth, through designing and optimizingan asymmetric bi-layer structure with a trapezoidal evaporation surface and awide leg-strengthened water supply pathway. Both experimental and simulationresults indicate that the evaporator presents ultra-high salt tolerance,which keeps running steadily for consecutive 14 days under the high salinityof 14 wt% NaCl and high irradiation of 4 suns. This excellent salt resistancearises from a diode-like ion migration introduced by its asymmetric structure.Meanwhile, a remarkable evaporation rate of 7.28 kg m~(?2) h~(?1) is also achievedunder the harsh condition, resulting from the high solar absorbance and thereduced evaporation enthalpy of the evaporator. Such an evaporator is confirmedas a simple, low-cost, scalable, efficient, and long-term stable devicefor producing freshwater under harsh desalination conditions.

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来源
《Advanced functional materials》 |2023年第6期|2210972.1-2210972.11|共11页
作者
Yawei Yang; Haixiang Feng; Wenxiu QueYu QiuYunqi LiLin GuoQing Li;
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作者单位

Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education International Center for Dielectric Research and Shaanxi Engineering Research Center of Advanced Energy Materials and Devices School of Electronic Science and Engineering;

School of Energy Science and Engineering Central South University Changsha, Hunan 410083, China;

Energy Research Institute Qilu University of Technology Jinan, Shandong 250014, China;

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正文语种英语
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关键词
asymmetric solar evaporators; desalination; passive solar-driven interfacial evaporation; salt resistance;

A Diode-like Scalable Asymmetric Solar Evaporator with Ultra-high Salt Resistance

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