Non-Magnetic Bimetallic MOF-Derived Porous Carbon-Wrapped TiO(2)/ZrTiO(4) Composites for Efficient Electromagnetic Wave Absorption.

Non-Magnetic Bimetallic MOF-Derived Porous Carbon-Wrapped TiO(2)/ZrTiO(4) Composites for Efficient Electromagnetic Wave Absorption.
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用于高效电磁波吸收的非磁性双金属 MOF 衍生的多孔碳包裹 TiO2/ZrTiO4 复合材料

DOI:
10.1007/s40820-021-00606-6
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发表时间:
2021-02-17
期刊:
影响因子:
26.6
通讯作者:
Liu J
Liu J
中科院分区:
材料科学1区
文献类型:
--
作者:
Qiao J;Zhang X;Liu C;Lyu L;Yang Y;Wang Z;Wu L;Liu W;Wang F;Liu J

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首次将非磁性双金属MOF衍生的多孔碳包覆纳米二氧化钛/钛酸锆复合材料用于高效吸波。讨论了包括界面极化增强和基本电导率在内的电磁波吸收机制。现代通信技术对电磁波吸收材料提出了更高的要求。金属有机骨架(MOF)类化合物以其多种优点受到广泛关注。为了打破磁性导数设计的思维定势,弥补单金属非磁性导数的不足,我们首先尝试了非磁性双金属MOF导数来实现高效的EMW吸收。碳包覆二氧化钛/钛酸锆多孔复合材料的最小反射损耗为 − 67.8Gb(2.16GHz,13.0 GHz),最大有效吸收带宽为5.9GHz(2.70Ghz)。通过深入的讨论,揭示了复合材料中界面极化增强和其他衰减机制的协同作用。因此,这项工作证实了非磁性双金属MOF衍生物在EMW吸收应用中的巨大潜力。网上版载有补充材料,可在(10.1007/s40820021-00606-6)查阅。
Non-magnetic bimetallic MOF-derived porous carbon-wrapped TiO2/ZrTiO4 composites are firstly used for efficient electromagnetic wave absorption. The electromagnetic wave absorption mechanisms including enhanced interfacial polarization and essential conductivity are intensively discussed. Modern communication technologies put forward higher requirements for electromagnetic wave (EMW) absorption materials. Metal–organic framework (MOF) derivatives have been widely concerned with its diverse advantages. To break the mindset of magnetic-derivative design, and make up the shortage of monometallic non-magnetic derivatives, we first try non-magnetic bimetallic MOFs derivatives to achieve efficient EMW absorption. The porous carbon-wrapped TiO2/ZrTiO4 composites derived from PCN-415 (TiZr-MOFs) are qualified with a minimum reflection loss of − 67.8 dB (2.16 mm, 13.0 GHz), and a maximum effective absorption bandwidth of 5.9 GHz (2.70 mm). Through in-depth discussions, the synergy of enhanced interfacial polarization and other attenuation mechanisms in the composites is revealed. Therefore, this work confirms the huge potentials of non-magnetic bimetallic MOFs derivatives in EMW absorption applications. The online version contains supplementary material available at (10.1007/s40820-021-00606-6).
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