Unidirectional freezing robust PPy@GO-SA aerogel for stable and efficient solar desalination

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination Pub Date : 2024-10-16 DOI:10.1016/j.desal.2024.118208

Ting Shu , Yuliang Zhang , Xiahui Liu , Zhuo Liu , Ying Qin , Fei Wang , Xueting Chang , Dongsheng Wang , Lihua Dong , Xiaobo Chen , Xijia Yin , Zecheng Qian

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引用次数: 0

Abstract

Solar interfacial evaporation technology is an effective and sustainable method for seawater desalination. It is crucial to achieve high photothermal conversion efficiency, rapid evaporation rate, and long-term stability. In this study, a vertically aligned porous aerogel evaporator is prepared using sodium alginate as the substrate material and graphene oxide (GO) and polypyrrole (PPy) as the photothermal materials through a directional freezing technology. The polypyrrole@graphene oxide-sodium alginate evaporator exhibits a high solar photothermal conversion efficiency as high as 98.6 % and an evaporation rate of up to 4.66 kg·m⁻²·h⁻¹ under 1 sun. During the 144-hour desalination, the evaporator transports brine for evaporation in the daytime and removes salt residue from the evaporator surface at night. It has demonstrated a self-cleaning behavior and restored its desalination stability. Thus, this aerogel evaporator with a high evaporation rate and stable salt resistance shows great potential for practical applications in solar thermal conversion and seawater desalination.

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用于稳定高效太阳能海水淡化的单向冷冻坚固 PPy@GO-SA 气凝胶

太阳能界面蒸发技术是一种有效且可持续的海水淡化方法。实现高光热转换效率、快速蒸发率和长期稳定性至关重要。本研究以海藻酸钠为基底材料，以氧化石墨烯（GO）和聚吡咯（PPy）为光热材料，通过定向冷冻技术制备了垂直排列的多孔气凝胶蒸发器。聚吡咯@氧化石墨烯-海藻酸钠蒸发器的太阳能光热转换效率高达 98.6%，在 1 个太阳下的蒸发率可达 4.66 kg-m-2-h-1。在 144 小时的海水淡化过程中，该蒸发器白天输送盐水进行蒸发，晚上清除蒸发器表面的盐残留物。该蒸发器具有自清洁功能，并恢复了海水淡化的稳定性。因此，这种具有高蒸发率和稳定耐盐性的气凝胶蒸发器在太阳能热转换和海水淡化的实际应用中显示出巨大的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.