Direct one-step synthesis of CoFex@Co@C hybrids derived from a metal organic framework for a lightweight and high-performance microwave absorber

Direct one-step synthesis of CoFex@Co@C hybrids derived from a metal organic framework for a lightweight and high-performance microwave absorber
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直接一步合成源自金属有机框架的CoFex@Co@C杂化物,用于轻质高性能微波吸收剂

DOI:
10.1088/1361-6528/ab5620
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发表时间:
2019-11
期刊:
影响因子:
3.5
通讯作者:
Zhongyuan Liu
Zhongyuan Liu
中科院分区:
材料科学3区
文献类型:
--
作者:
Bochong Wang;Wenjun Ruan;Congpu Mu;Anmin Nie;Fusheng Wen;Jianyong Xiang;Zhongyuan Liu

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探索高效、灵活的轻质微波吸收材料,既有强烈的期望,也有严峻的挑战。在这里,我们通过一种简单的方法成功地将CoFex@Co纳米颗粒嵌入到由金属有机骨架(MOF)直接衍生的碳基质中。由于碳材料与磁性纳米粒子独特的多维结构以及在电磁能量损耗和阻抗匹配方面的协同效应,CoFe0.26@Co@C复合材料表现出了优异的微波吸收性能,在厚度为1.5 mm时,其反射损耗最小为−62.5d B,在厚度为1.4~5 mm时的吸收带宽为14.7 GHz,超过−10 d B。本研究不仅为今后MOF基轻质微波吸收材料的制备提供了参考,而且由于其工艺简单、吸波性能优异,也为其可能的应用提供了参考。
It involves invariably strong expectations and a tough challenge to explore lightweight microwave absorption materials with high efficiency and agile tenability. Here, we successfully synthesized CoFex@Co nanoparticles embedded into a carbon matrix that was directly derived from the metal organic frameworks (MOFs) via a facile method. Benefiting from the unique multi-dimensional construction and synergistic effects of carbon material with magnetic nanoparticles in both the electromagnetic energy loss and impedance matching, CoFe0.26@Co@C composite exhibited excellent microwave absorption performance, which showed a minimum reflection loss of −62.5 dB at the thickness of 1.5 mm and a broad absorption bandwidth of 14.7 GHz exceeding −10 dB at the thickness range of 1.4 to 5 mm. This study not only provides a reference for future preparation of MOF-based lightweight microwave absorption materials, but also offers the possible application owing to its simple procedure and outstanding absorption properties.
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