Energetic metal-organic frameworks deflagration enabled ultrafast low-temperature synthesis of ultra-light magnetic nanoparticles decorated high-lossy materials

Magnetic/dielectric nanocomposites featuring strong electromagnetic wave response are ideal materials for microwave absorbing, due to their high dissipation capability and optimized impedance matching. However, it is still a challenge to synthesize such nanocomposites due to the drawbacks of convent...

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Bibliographic Details
Published in:Carbon (New York) 2020-09, Vol.165, p.286-295
Main Authors: Liu, Yousong, Quan, Bin, Liang, Xiaohui, Huang, Bing, Huang, Shiliang, Li, Xiaodong, Ji, Guangbin, Jin, Zhong, Yang, Guangcheng
Format: Article
Language:English
Subjects:
Chemical synthesis
Deflagration
Deflagration methodology
Dielectric strength
Electromagnetic radiation
Electromagnetic wave absorption
Energetic metal-organic frameworks
Energy conversion efficiency
Graphene
Impedance matching
Low temperature
Low temperature physics
Magnetic fields
Metal-organic frameworks
Microwave absorption
Nanocomposites
Nanoparticles
Power consumption
Pyrolysis
Ultrafast low-temperature synthesis
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Summary:Magnetic/dielectric nanocomposites featuring strong electromagnetic wave response are ideal materials for microwave absorbing, due to their high dissipation capability and optimized impedance matching. However, it is still a challenge to synthesize such nanocomposites due to the drawbacks of conventional fabrication approaches, such as considerable time consumption, high-power dissipation, low efficiency as well as insufficient contact. Here, an ultrafast energetic metal-organic framework (EMOF) deflagration methodology was proposed to transform EMOF nanoparticles to magnetic nanoparticles and simultaneously convert graphene oxide to reduced graphene oxide (RGO) by utilizing the huge heat release via one-step pyrolysis. The obtained absorbers exhibit remarkable microwave response capability at an ultra-low loading content, which verifies the practicability and advantages of this synthetic approach. Moreover, this work opens up potential opportunities for EMOFs applications in a wide range and expands the future materials design scopes. Utilizing the deflagration of energetic metal-organic frameworks [Fe(BTO)(H2O)2]n, an ultrafast and low-temperature synthesis of Fe3O4/RGO nanocomposites is successfully realized. This scheme illustrates the deflagration process of the [Fe(BTO)(H2O)2]n, in which the energetic ligands decompose and release a huge amount of heat/gas to achieve the formation of ultra-small Fe3O4 nanoparticles and fast reduction of graphene oxide. [Display omitted]
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2020.04.089