Synergistic dielectric and magnetic effects boosting electromagnetic wave absorption in Flower-Ball-like VSe2@CoFe2O4 composites

[Display omitted] •Flower-Ball-like VSe2@CoFe2O4 composites were fabricated.•Combination of dielectric and magnetic components optimizes impedance matching.•The reflection loss of-65.39 dB and an effective absorption bandwidth of 5.7 GHz can be achieved for VC-3.•Theoretical methods are applied to e...

Full description

Saved in:
Bibliographic Details
Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2024-11, Vol.499, p.156244, Article 156244
Main Authors: Liu, Jinchang, Xu, Leyao, Shao, Cong, Liu, Zhaolin, Zhang, Guowei, Guan, Yuang, Zhang, Yunyao, Lei, Xiaoyi, Dai, Yang, Zhao, Wu, Yan, Junfeng, Zhang, Han
Format: Article
Language:English
Subjects:
Electromagnetic wave absorption
Far-field simulation
First-principles calculation
Flower-ball-like VSe2@CoFe2O4
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •Flower-Ball-like VSe2@CoFe2O4 composites were fabricated.•Combination of dielectric and magnetic components optimizes impedance matching.•The reflection loss of-65.39 dB and an effective absorption bandwidth of 5.7 GHz can be achieved for VC-3.•Theoretical methods are applied to explain the mechanism and effect of wave absorption (First-principles calculation and far-field simulation). Designing absorbers with an electromagnetic synergistic effect is one of the most appropriate ways to achieve efficient electromagnetic absorption. In this research, VSe2@CoFe2O4 composites are created by incorporating magnetic ferrite CoFe2O4 particles adhered to 2D VSe2 nanosheets to generate a distinct flower-ball-like structure. The electromagnetic wave absorption properties of the composites can be meticulously calibrated by manipulating the proportion of CoFe2O4 to VSe2. In the optimal ratio, the minimum reflection loss of VSe2@CoFe2O4 is −65.39 dB and the effective absorption bandwidth is 5.7 GHz. Furthermore, an enlarged EAB to 6.37 GHz can be observed by increasing the mass of CoFe2O4. Theoretical approaches including first-principles calculation and far-field simulation are employed to comprehensively elucidate the microwave absorption mechanism and effect. The study provides profound insights into collaborative dielectric-magnetic composites for electromagnetic wave absorption engineering.
ISSN:1385-8947
DOI:10.1016/j.cej.2024.156244