Jute-based porous biomass carbon composited by Fe3O4 nanoparticles as an excellent microwave absorber

Porous jute biomass carbon (PJBC) composited by Fe3O4 nanoparticles were successfully prepared by a chemical coprecipitation method at a low temperature of 60 °C, which is very simple to prepare a high degree of purity of Fe3O4 nanoparticles. The structure, morphology, and microwave absorption perfo...

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Bibliographic Details
Published in:Journal of alloys and compounds 2019-09, Vol.803, p.1119-1126
Main Authors: Wang, Lihong, Guan, Hongtao, Hu, Jianqiao, Huang, Qiang, Dong, Chengjun, Qian, Wei, Wang, Yude
Format: Article
Language:English
Subjects:
Biomass
Composite materials
Impedance matching
Iron oxides
Jute
Microwave absorbers
Microwave absorption
Morphology
Nanoparticles
Organic chemistry
Reflection
Resonance scattering
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Summary:Porous jute biomass carbon (PJBC) composited by Fe3O4 nanoparticles were successfully prepared by a chemical coprecipitation method at a low temperature of 60 °C, which is very simple to prepare a high degree of purity of Fe3O4 nanoparticles. The structure, morphology, and microwave absorption performances of the Fe3O4/PJBC composites were investigated in detail. Due to the porous structure and large interfaces between Fe3O4 and PJBC, the Fe3O4/PJBC composites show excellent microwave absorption performances. The minimum reflection loss (RL) value of −39.5 dB is obtained for the Fe3O4/PJBC composites at the frequency of 6.4 GHz. When the thickness is only 1.6 mm, an effective absorption bandwidth (RL ≤ −10 dB) for 5 GHz is achieved from 13.8 to 17.8 GHz. The excellent microwave absorption performances for the Fe3O4/PJBC composites are rooted in enhanced impedance matching, large interfaces, ionic polarization, eddy loss, natural resonance, and multiple reflection and scattering. Consequently, considering market applications and the cost, the Fe3O4/PJBC composite in this work can be a promising candidate for microwave absorber.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2019.06.351