Fe-MOF derived Fe3O4/C-based hydrogel for efficient solar-driven photothermal evaporation

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination Pub Date : 2024-09-26 DOI:10.1016/j.desal.2024.118138

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引用次数: 0

Abstract

Solar-driven interfacial photothermal evaporation (SIPE) has been considered as a green and sustainable technology for obtaining fresh water, and the exploring efficient photothermal materials is crucial. Nanocomposite derived from metal-organic framework exhibits high light absorption properties and excellent chemical stability, making it an ideal candidate in the SIPE. Herein, Fe₃O₄/C nanocomposite was obtained using MIL-101 (Fe) as a precursor, and Fe₃O₄/C-based porous hydrogel (Fe₃O₄/C-PH) was subsequently prepared through chemical crosslinking foaming polymerization. The obtained Fe₃O₄/C-PH exhibited an evaporation rate of 3.33 kg m⁻² h⁻¹ under one sun intensity. Fe₃O₄/C-PH demonstrated outstanding desalination and salting out resistance when treating real seawater. Moreover, it could remove over 99 % of dyes from wastewater. The photothermal mechanisms are molecular thermal vibration of C component and semiconductor relaxation of Fe₃O₄. Meanwhile, the hydrophilic and porous skeleton structure of the hydrogel ensure Fe₃O₄/C-PH to transport water rapidly and exhibit good light absorption properties. This research broadens the candidate of photothermal materials for applications in SIPE, and also provides new avenues for desalination and wastewater purification.

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用于太阳能驱动的高效光热蒸发的 Fe-MOF 衍生 Fe3O4/C 基水凝胶

太阳能驱动的界面光热蒸发（SIPE）被认为是一种获取淡水的绿色可持续技术，因此探索高效的光热材料至关重要。金属有机框架衍生的纳米复合材料具有高光吸收性和优异的化学稳定性，是 SIPE 的理想候选材料。本文以 MIL-101 (Fe)为前驱体获得了 Fe3O4/C 纳米复合材料，随后通过化学交联发泡聚合制备了基于 Fe3O4/C 的多孔水凝胶（Fe3O4/C-PH）。获得的 Fe3O4/C-PH 在一个日照强度下的蒸发率为 3.33 kg m-2 h-1。在处理实际海水时，Fe3O4/C-PH 表现出卓越的脱盐和抗盐析能力。此外，它还能去除废水中 99% 以上的染料。光热机制是 C 成分的分子热振动和 Fe3O4 的半导体弛豫。同时，水凝胶的亲水性和多孔骨架结构确保了 Fe3O4/C-PH 能够快速输送水分，并表现出良好的光吸收特性。这项研究拓宽了光热材料在 SIPE 中的应用领域，也为海水淡化和废水净化提供了新的途径。

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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.