双金属
微波食品加热
材料科学
钴
金属有机骨架
镍
反射损耗
吸收(声学)
微观结构
光电子学
化学工程
纳米技术
复合材料
化学
复合数
冶金
有机化学
吸附
电信
工程类
计算机科学
作者
Kai Lin,Lingyun Wu,Tianyu Wu,Caini Yuan,Xiaolong Jia,Xiaoping Yang,Gang Sui
标识
DOI:10.1016/j.jcis.2022.07.048
摘要
Metal-organic framework materials (MOF) have become a new generation of microwave absorption (MA) materials. However, it is still challenging to design an appropriate microstructure that can efficiently adjust the microwave absorbing characteristics. Herein, a novel bimetal-doped core-shell carbon derived from nickel-cobalt dual-ligand MOF has been successfully prepared. By changing the ratio of the second ligand, the morphology can change from sea urchin-like to rod-like and petal-like shapes, thereby regulating the final wave absorption performance of MOF derivatives. The Bi-MOF-1 exhibited strong microwave absorption (up to -70.70 dB), while Bi-MOF-2 presented broad effective absorption bandwidth (5.92 GHz). The analyses indicated that the excellent impedance matching can be attributed to the double-layer magnetic loss and multiple dielectric loss of the core-shell structure. This work provides a feasible approach for the design and preparation of functional composite structures based on MOF derivatives with controllable microwave absorbing properties.
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