Porous flower-like Ni/C composites derived from MOFs toward high-performance electromagnetic wave absorption

•A new type of porous flower-like Ni/C composites were designed and synthesized.•The new strategy is facile, controllable and without surface active agents.•The desirable impedance match of flower-like structures can be achieved.•The maximum reflection loss of −50.2 dB at a thickness of 1.6 mm have...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2019-10, Vol.487, p.165334, Article 165334
Main Authors: Zhang, Zilong, Lv, Yangyang, Chen, Xiqiao, Wu, Zhuang, He, Yaoyi, Zhang, Lei, Zou, Yanhong
Format: Article
Language:English
Subjects:
Absorption spectra
Attenuation
Composite materials
Electromagnetic absorption
Electromagnetic properties
Electromagnetic radiation
Flower-like structure
Impedance matching
Materials selection
Metal-organic frameworks
Microwave absorbers
Nickel
Pyrolysis
Stability
Synergistic effect
Thermal decomposition
Zinc
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Summary:•A new type of porous flower-like Ni/C composites were designed and synthesized.•The new strategy is facile, controllable and without surface active agents.•The desirable impedance match of flower-like structures can be achieved.•The maximum reflection loss of −50.2 dB at a thickness of 1.6 mm have been achieved. The porous flower-like Ni/C composites were simply prepared through the pyrolysis of Zn-doped metal organic frameworks (MOFs) under a N2 atmosphere. The method is facile, controllable and without surface active agents. The microstructure, composition, and electromagnetic parameters can be easily controlled by varying thermal decomposition temperature to achieve the high electromagnetic loss. Interestingly, the Ni/C composites calcined at 800 °C have strong electromagnetic absorption with the maximum reflection loss (RL) value of −52.4 dB. In addition, the effective absorption band width (
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2019.165334