使用聚乙烯醇封装的MXene/无纺布纤维，用于太阳能海水淡化/污水净化，是一种高效、坚固且价格合理的光热膜

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-01-20 DOI:10.1016/j.cej.2025.159742

Ye Cao, Pingping Gong, Peng Yu, Yijing Wang, Zhenli Zuo, Changyuan Pan, Xinbing Wang, Peng Zhong, Xiaohua Ma

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引用次数: 0

摘要

近年来，Ti3C2Tx （MXene）由于其接近单位光热转换效率、独特的层状结构和丰富的表面终端而成为太阳界面蒸发的理想光热材料。然而，MXene光热膜仍然面临包括蒸发性能、稳定性和成本等关键问题，这些问题限制了其商业化。因此，本研究构建了MXene/聚乙烯醇(PVA)/非织造纤维（NWF）复合光热膜（MPF），只需将NWF浸泡在MXene溶液中达到饱和吸附，然后滴下PVA作为包封层。在虹吸式太阳能蒸发器中，1个太阳时，MPF的蒸发速率和效率分别达到1.84 kgm−2h−1和99.82 %。高蒸发性能归因于通过调节MPF的微观结构改善光吸收、水输送和热管理以及降低蒸发焓的协同效应。在3.5 wt%的模拟海水和不同盐度（0-15 wt%）的模拟海水中，MPF在15个循环后保持稳定的蒸发。强积金还具有很强的光强适应性（0.5-3个太阳），以及出色的耐盐性和结构稳定性。MPF的高稳定性得益于PVA的封装，它将MXene牢固地焊接到NWF上，并保护MXene不受水和氧气的影响。此外，强积金在不同模拟海水/废水中表现出优异的水净化能力。最后，据估计，MPF具有2320 $m - 2的低成本和79.3 $m - 1/$的高成本效益，与其他报道的光热膜相比，具有显著的成本优势。通过根据需要将NWF切割成任何尺寸，可以轻松获得大面积（例如12 × 12 cm2）和灵活的MPF。本工作促进了MXene光热膜在太阳能水处理中的实际应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

An efficient, robust, and affordable photothermal membrane using polyvinyl alcohol encapsulated MXene/non-woven fibers for solar desalination/sewage purification

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An efficient, robust, and affordable photothermal membrane using polyvinyl alcohol encapsulated MXene/non-woven fibers for solar desalination/sewage purification

Recently Ti₃C₂T_x (MXene) has become an ideal photothermal material for solar interface evaporation, due to its near unit photothermal conversion efficiency, unique layered structures, and abundant surface terminals. However, MXene photothermal membranes still face key issues including evaporation performance, stability, and cost, which restrict their commercialization. Hence, a composite photothermal membrane (MPF) of MXene/polyvinyl alcohol (PVA)/nonwoven fiber (NWF) is constructed in this study, simply by soaking NWF into a MXene solution to achieve saturated adsorption, followed by dropping PVA as an encapsulation layer. The evaporation rate and efficiency of MPF reach 1.84 kgm⁻²h⁻¹ and 99.82 %, respectively, at 1 sun in a siphon-model solar evaporator. The high evaporation performance is attributed to a synergistic effect of improved light absorption, water transport, and thermal management, as well as reduced evaporation enthalpy, by modulating the microstructures of MPF. MPF maintains stable evaporation after 15 cycles in 3.5 wt% simulated seawater, and in simulated seawater with different salinities (0–15 wt%). MPF also shows great light intensity adaptability (0.5–3 sun), and outstanding salt resistance and structural stability. The high stability of MPF is contributed by the encapsulation of PVA, which firmly welds MXene onto NWF and protect MXene from water and oxygen. In addition, MPF exhibits excellent water purification capabilities for different simulating seawater/wastewater. Finally, it is estimated that MPF has a low cost of 23.2 $m⁻² and a high cost-effectiveness of 79.3 gh⁻¹/$, showing significant cost advantages compared to other reported photothermal membranes. A large-area (e.g., 12 × 12 cm²) and flexible MPF can be easily obtained by cutting NWF into any size as needed. This work promotes the practical application of MXene photothermal membranes in solar water treatment.

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.