利用磷化物装饰的西瓜状相变微胶囊实现可持续太阳能海水淡化

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination Pub Date : 2024-11-06 DOI:10.1016/j.desal.2024.118283

Xin Zhang , Shanshan Yang , Huanzhi Zhang , Huan Liu , Xiaodong Wang

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引用次数: 0

摘要

太阳能界面蒸发被认为是一种新兴的海水淡化创新技术，但它在间歇性太阳辐照下存在蒸发效率不足的问题。为了实现可持续的太阳能海水淡化以生产清洁水，我们设计了一种新型西瓜状相变微胶囊，作为太阳能界面蒸发器的光热吸收材料。这种相变微胶囊是通过合理的逐层微胶囊技术制备而成的，其内核为含 ZrO2 纳米粒子的正二十二烷相变材料（PCM），用于太阳能光热吸收和快速热反应；ZrO2 外壳用于防止熔融正二十二烷内核泄漏；聚多巴胺涂层层及其表面装饰的磷烯纳米片用于高效吸收太阳光和快速输水。经透射电子显微镜和扫描电子显微镜证实，这些微胶囊具有西瓜状的微观结构。它们还具有 84.95 % 的高光吸收效率、146.2 J g-1 的高潜热容量和良好的润湿性。所开发的太阳能界面蒸发器配备了西瓜状相变微胶囊，在一太阳光照下的海水淡化蒸发率达到 3.09 kg m-2 h-1。微胶囊中的 PCM 内核可以在充足的太阳光照射下将太阳光热能作为潜热储存起来，然后在没有太阳光照射的蒸发条件下释放出来，从而提高水的蒸发效率。与不含 PCM 的转换式太阳能蒸发器相比，所开发的蒸发器在阴天的总蒸发量可增加 31.5%，这表明在间歇性太阳辐照条件下，蒸发性能显著提高。所开发的太阳能界面蒸发器在可持续太阳能海水淡化方面具有巨大的应用潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Sustainable solar-powered seawater desalination enabled by phosphorene-decorated watermelon-like phase-change microcapsules

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Sustainable solar-powered seawater desalination enabled by phosphorene-decorated watermelon-like phase-change microcapsules

Solar-powered interfacial evaporation is considered as an emerging innovative technology for seawater desalination; however, it suffers from insufficient evaporation efficiency under intermittent solar irradiation. Aiming at realizing sustainable solar-powered seawater desalination for clean water production, we have designed a new type of watermelon-like phase-change microcapsules as a photothermal absorbent material for solar interfacial evaporators. This type of phase-change microcapsules was prepared through rational layer-by-layer microencapsulation with a ZrO₂ nanoparticle-containing n-docosane core as a phase-change material (PCM) for solar photothermal harvest and prompt thermal response, a ZrO₂ shell for the leakage prevention of the molten n-docosane core, and a polydopamine coating layer together with its surface-decorated phosphorene nanoflakes for high-efficient sunlight absorption and fast water transportation. The resultant microcapsules are featured by a watermelon-like microstructure as confirmed by transmission electron and scanning electron microscopy. They also exhibit a high light absorption efficiency of 84.95 %, a high latent heat capacity of 146.2 J g⁻¹, and good wettability. Equipped with the watermelon-like phase-change microcapsules, the developed solar interfacial evaporator obtained an evaporation rate of 3.09 kg m⁻² h⁻¹ under one-sun illumination for seawater desalination. The PCM core within the microcapsules can store solar photothermal energy as latent heat under sufficient solar irradiation and then release it under evaporation conditions without sunlight illumination, thus enhancing the water evaporation efficiency. This enables the developed evaporator to increase its total evaporation mass by 31.5 % on a cloudy day in comparison with the conversional solar evaporator without a PCM, indicating a remarkable enhancement in the evaporation performance under intermittent solar irradiation. The developed solar interfacial evaporator exhibits great potential for application in sustainable solar-powered seawater desalination.

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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.