Boosting Microwave Absorption Performance of Bio-gel Derived Co/C Nanocomposites
Yiming Zhong, Dechun Liu, Qiuyun Yang, Yunpeng Qu, Changyou Yu, Kelan Yan, Peitao Xie, Xiaosi Qi, Zhanhu Guo and Zhexenbek Toktarbay
1College of Physics, Guizhou University, Guiyang, 550025, China
2College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, China
3Qingdao Municipal Hospital, Qingdao, 266000, China
4State Key Laboratory of Material-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, 210009, China
5Integrated Composites Lab, Department of Mechanical and Construction Engineering, Northumbria University, Newcastle Upon Tyne, NE1 8ST, UK
6Laboratory of Engineering Profile, Satbayev University, Satbayev St. 22a, Almaty 050013, Kazakhstan
Abstract
The Co/C nanocomposites toward outstanding electromagnetic (EM) microwave absorption were meticulously designed and prepared by bio-gel method. The Co nanoparticles were embedded into the carbon network constructed by agar powder. Our obtained Co/C nanocomposites exhibited excellent EM wave absorption performance including wide bandwidth (7.1 GHz), thin thickness (1.71 mm), light weight and wide effective absorbing frequency. Dielectric relaxation at multilayer interfaces, porous biomass carbon materials and magnetic Co nanoparticles are the main sources for enhancing the wave absorption properties. The amorphous carbon in the material prevents the condensation and oxidation of magnetic Co nanoparticles, thus contributing to the generation of good impedance matching. On the basis of the percolation theory, the optimal Co content was determined, and a percolation model suitable for Co/C materials was established.
Publication details
Received: 16 Sep 2023
Revised: 12 Oct 2023
Accepted: 16 Oct 2023
Published online: 18 Oct 2023
Article type:
Research Paper
DOI:
10.30919/es988
Volume:
26
Article :
988
Citation:
Engineered Science, 2023, 26, 988
Permissions:
Copyright
Number of downloads:
1899
Citation Information:
28
Description:
The Co/C porous nanocomposites with strong absorption capability, wide bandwidth, and thin matching ....
The Co/C porous nanocomposites with strong absorption capability, wide bandwidth, and thin matching thicknesses were achieved.
Supplementary Information:
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