基于自我牺牲模板的MOF-74 (Ni)−封装镍棒：先进电磁波吸收的核壳结构设计

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-02-22 DOI:10.1016/j.jallcom.2025.179371

Xinyu Gao , Kun Zhang , Huiqiang Ding , Xuedong Zhang , Yizhuo Sun , Xiaoyu Zhao , Fengyi Zhang , Yaxin Wang , Renxian Gao , Rufei Cui , Yongjun Zhang

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引用次数: 0

摘要

在这项研究中，我们采用自牺牲模板法合成了MOF-74 （Ni）封装的刺状Ni棒（NiSR/NiP/C），而不需要额外的Ni 2 +离子。通过调整DOT（2,5-二羟基对苯二甲酸）的用量，系统地研究了复合材料的形貌和电磁波吸收性能。MOF-74（Ni）的引入通过增强阻抗匹配、界面极化、多次反射、传导损耗、磁损耗和缺陷极化，显著改善了微波吸收性能。在所有样品中，NiSR/NiP/C_4表现最好，在厚度为2.68 mm时，反射损耗最小（RLmin）为-76.97 dB。这项工作为设计具有可调微波吸收能力的核壳复合材料提供了一种可扩展和有效的方法，显示了轻质和高性能电磁吸收材料的巨大潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

MOF-74 (Ni)−encapsulated nickel rods via self-sacrificial template approach: A core-shell structural design for advanced electromagnetic wave absorption

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MOF-74 (Ni)−encapsulated nickel rods via self-sacrificial template approach: A core-shell structural design for advanced electromagnetic wave absorption

In this study, we synthesized MOF-74 (Ni) -encapsulated spiny Ni rods (Ni_SR/Ni_P/C) using a self-sacrificial template method without the need for additional Ni²⁺ ions. By adjusting the amount of DOT (2,5-dihydroxyterephthalic acid), the morphology and electromagnetic wave absorption (EMA) properties of the composites were systematically investigated. The introduction of MOF-74(Ni) significantly improved the microwave absorption performance through enhanced impedance matching, interfacial polarization, multiple reflections, conduction losses, magnetic losses, and defect polarization. Among all samples, Ni_SR/Ni_P/C_4 exhibited the best performance, achieving a minimum reflection loss (RL_min) of −76.97 dB at a thickness of 2.68 mm. This work provides a scalable and efficient approach for the design of core-shell composites with tunable microwave absorption capabilities, showing great potential for lightweight and high-performance electromagnetic absorbers.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.