Metal-Organic Framework Derived Hierarchical Co/C@V(2)O(3 )Hollow Spheres as a Thin, Lightweight, and High-Efficiency Electromagnetic Wave Absorber
Metal-Organic Framework Derived Hierarchical Co/C@V(2)O(3 )Hollow Spheres as a Thin, Lightweight, and High-Efficiency Electromagnetic Wave Absorber
复制标题
金属有机框架衍生的多级Co/C@V(2)O(3)空心球作为薄型、轻质、高效的电磁波吸收体
DOI：
10.1002/chem.201805565
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Yan Mi
中科院分区：
文献类型：
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作者：
Zhou Chenhui;Wu Chen;Liu Dong;Yan Mi
开发重量轻、厚度薄、吸收带宽宽的高效电磁波吸收材料是电子和通信设备不断发展的迫切需要。本论文采用水热、沉淀、热解等方法，设计并合成了层次化金属有机骨架(MOF)Co/C@V2O3空心球。由于中空V2O3微球与多孔Co/C的合理结合，复合材料表现出良好的阻抗匹配和重量轻。此外，多组分使复合材料具有较大的介电和磁损耗，提高了电磁波吸收性能，最大反射损耗(RL)为40.1GHZ，在1.5−mm的小厚度下，有效吸收带宽(RL<；−10 Db)为4.64Ghz，厚度为1.5 mm。这项工作为多层中空和多孔复合材料的设计提供了新的思路，使其成为具有高效吸收功能的轻薄电磁波吸收材料，并可扩展到储能、催化和传感领域。
Developing high‐efficiency electromagnetic (EM) wave absorbing materials with light weight, thin thickness, and wide absorption bandwidth is highly desirable for ever‐developing electronic and telecommunication devices. Herein, hierarchical metal–organic framework (MOF)‐derived Co/C@V2O3hollow spheres were designed and synthesized through a facile hydrothermal, precipitation, and pyrolysis method. The composite exhibits both excellent impedance matching and light weight due to the rational combination of hollow V2O3spheres and porous Co/C. Additionally, multiple components enable a large dielectric and magnetic loss of the composite, giving rise to enhanced EM wave absorption performance with a maximum reflection loss (RL) of −40.1 dB and a broad effective absorption bandwidth (RL< −10 dB) of 4.64 GHz at a small thickness of 1.5 mm. This work provides insights into the design of hierarchical hollow and porous composites as thin and lightweight EM wave absorbers with efficient absorption, which can also be extended to energy storage, catalysis, and sensing.