Janus membranes with dynamically reversible solar evaporation interfaces

IF 11.4 1区 工程技术 Q1 ENGINEERING, CHEMICAL
Tianxin Lu, Qinglin Wu, Yu Zhou, Xuanzhi Wang, Weiwei Shi
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Abstract

Interfacial solar evaporation is an innovative technique that has attracted significant attention for its potential applications across a variety of fields. Traditional evaporators either apply the hydrophobic surface or the hydrophilic, exposed to solar irradiation. However, both situations result in the poor heat and mass transfer with the long-term operations, further lower down evaporation performance. Herein, Janus membranes (FePP) were designed with dynamically reversible solar evaporation interfaces; the top surface exhibited superhydrophobic exposed to solar irradiation while superhydrophilic in the dark environment. This property minimizes salt fouling by regulating salt deposition during evaporation cycles, while facilitating easy recovery during the hydrophilic state. The solar evaporation performance has improved with the average rate of 1.48 ± 0.05 kg m−2h−1, 2.6 times more than the control group of water interface without FePP under one-sun irradiation. Furthermore, it demonstrated excellent stability and strong salt-resistance ability in the long-term desalination and highly saline water operation. Even outdoor field tests, FePP also showed strong solar evaporation and desalination performance exposed to the changing irradiation under the sun. This work further promotes the practical applications of the solar interfacial evaporators into the wastewater treatment, water desalination and purification, and energy production.

Abstract Image

具有动态可逆太阳蒸发界面的Janus膜
界面太阳能蒸发是一项创新技术,因其在各个领域的潜在应用而受到广泛关注。传统蒸发器要么采用疏水表面,要么采用亲水表面,暴露在太阳照射下。然而,这两种情况都导致了长期运行的传热传质不良,进一步降低了蒸发性能。本文设计了具有动态可逆太阳蒸发界面的Janus膜(FePP);顶表面在太阳照射下表现为超疏水性,在黑暗环境下表现为超亲水性。这种特性通过调节蒸发循环中的盐沉积来最大限度地减少盐污染,同时在亲水性状态下易于恢复。单太阳照射下,水界面的平均蒸发速率为1.48±0.05 kg m−2h−1,是不加FePP的对照组的2.6倍。在长期的脱盐和高咸水运行中表现出优异的稳定性和较强的耐盐能力。即使在室外现场试验中,FePP在太阳照射下也表现出较强的太阳蒸发和脱盐性能。这项工作进一步促进了太阳能界面蒸发器在废水处理、海水淡化净化和能源生产等方面的实际应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
npj Clean Water
npj Clean Water Environmental Science-Water Science and Technology
CiteScore
15.30
自引率
2.60%
发文量
61
审稿时长
5 weeks
期刊介绍: npj Clean Water publishes high-quality papers that report cutting-edge science, technology, applications, policies, and societal issues contributing to a more sustainable supply of clean water. The journal's publications may also support and accelerate the achievement of Sustainable Development Goal 6, which focuses on clean water and sanitation.
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