A typha orientalis-inspired 3D Janus solar evaporator with controllable wettability for highly efficient and stable solar desalination

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination Pub Date : 2024-11-17 DOI:10.1016/j.desal.2024.118318

Guoyan Yang , Zuozhu Yin , Qidong Zha , Ritong Wang , Yu Xie , Yuhua Chen , Zhen Hong , Yidan Luo , Mingshan Xue

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引用次数: 0

Abstract

Solar-powered interfacial evaporators, though promising for seawater desalination and wastewater treatment, but suffer from the problems of monolithic structure and complex preparation. It is of great importance to develop a multi-layered solar evaporator that possesses stable and high-efficiency photothermal performance. Our research employs simple liquid-phase polymerization and chemical deposition methods to achieve this. The objective of this study is to develop a highly efficient solar evaporator, designated as SA/MWCNTs@PPy/MWCNTs-NH₂@PU (SMPMPU), by integrating stearic acid (SA), multi-walled carbon nanotubes (MWCNTs), polypyrrole (PPy), and aminated multi-walled carbon nanotubes (MWCNTs-NH₂) within a polyurethane (PU) matrix. Inspired by typha orientalis, this evaporator boasts a highly antibacterial, self-floating Janus bilayer structure. This double-layered Janus solar evaporator utilizes the capillary adsorption effect to regulate the flow of water. It slows down heat transfer and significantly improves energy utilization efficiency. The resulting SMPMPU solar evaporator demonstrates a solar steam conversion efficiency with an evaporation rate of 2.40 kg·m⁻²·h⁻¹, which is attributed to the material's efficient absorption of light energy. Its evaporation efficiency under one sun illumination reaches 92.76 %, which can be credited to the Janus interface facilitating the absorption and evaporation of water molecules. The Janus bilayer structured solar evaporator developed in this study holds great promise and is anticipated to find widespread applications in seawater desalination and other related fields.

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受东方台风启发的3D Janus太阳能蒸发器，具有可控制的润湿性，可实现高效稳定的太阳能脱盐

太阳能界面蒸发器在海水淡化和污水处理方面具有广阔的应用前景，但存在结构单一、制备复杂等问题。开发具有稳定高效光热性能的多层太阳能蒸发器具有重要意义。我们的研究采用简单的液相聚合和化学沉积方法来实现这一目标。本研究的目的是通过将硬脂酸（SA）、多壁碳纳米管（MWCNTs）、聚吡咯（PPy）和胺化多壁碳纳米管（MWCNTs- nh2）集成在聚氨酯（PU）基体中，开发一种高效的太阳能蒸发器，命名为SA/MWCNTs@PPy/MWCNTs-NH2@PU （SMPMPU）。这款蒸发器的灵感来自于东方香菇，具有高度抗菌、自漂浮的双层结构。这种双层Janus太阳能蒸发器利用毛细管吸附效应来调节水的流量。它减缓了传热，显著提高了能源利用效率。所制备的SMPMPU太阳能蒸发器具有2.40 kg·m−2·h−1的太阳能蒸汽转换效率，这主要归功于材料对光能的有效吸收。在一次太阳照射下，其蒸发效率达到92.76%，这可归因于Janus界面有利于水分子的吸收和蒸发。本研究开发的Janus双层结构太阳能蒸发器具有广阔的应用前景，有望在海水淡化等相关领域得到广泛应用。

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来源期刊

Desalination 工程技术-工程：化工

CiteScore

14.60

自引率

20.20%

发文量

619

审稿时长

41 days

期刊介绍： Desalination is a scholarly journal that focuses on the field of desalination materials, processes, and associated technologies. It encompasses a wide range of disciplines and aims to publish exceptional papers in this area. The journal invites submissions that explicitly revolve around water desalting and its applications to various sources such as seawater, groundwater, and wastewater. It particularly encourages research on diverse desalination methods including thermal, membrane, sorption, and hybrid processes. By providing a platform for innovative studies, Desalination aims to advance the understanding and development of desalination technologies, promoting sustainable solutions for water scarcity challenges.