Structural Engineering of Hierarchical Magnetic/Carbon Nanocomposites via In Situ Growth for High-Efficient Electromagnetic Wave Absorption

Highlights Hierarchical Fe 3 O 4 -Fe@CNFs/Al-Fe 3 O 4 -Fe nanocomposites were constructed by in situ growth, vacuum-assisted filtration, and self-reduction methods. The carbon framework, with in situ grown magnetic nanoparticles, supports two-dimensional magnetic nanosheets, achieving excellent elec...

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Vydáno v:Nano-micro letters Ročník 16; číslo 1; s. 174 - 17
Hlavní autoři: Liu, Xianyuan, Zhou, Jinman, Xue, Ying, Lu, Xianyong
Médium: Journal Article
Jazyk:angličtina
Vydáno: Singapore Springer Nature Singapore 01.12.2024
Springer Nature B.V
SpringerOpen
Témata:
Absorption
Broadband
Carbon
Carbon fibers
Chemical properties
Dielectric polarization
Electromagnetic radiation
Electromagnetic wave absorption
Engineering
Hierarchical structure
Impedance matching
In situ growth
Iron oxides
Material properties
Microwave attenuation
Nanocomposites
Nanoparticles
Nanoscale Science and Technology
Nanosheets
Nanotechnology
Nanotechnology and Microengineering
Radar cross sections
Reduction
Self-reduction
Special issue on EM Wave Functional Materials
Structural design
Structural engineering
Self-reduction
In situ growth
Electromagnetic wave absorption
Hierarchical structure
ISSN:2311-6706, 2150-5551, 2150-5551
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Shrnutí:Highlights Hierarchical Fe 3 O 4 -Fe@CNFs/Al-Fe 3 O 4 -Fe nanocomposites were constructed by in situ growth, vacuum-assisted filtration, and self-reduction methods. The carbon framework, with in situ grown magnetic nanoparticles, supports two-dimensional magnetic nanosheets, achieving excellent electromagnetic performance and good impedance matching. Excellent reflection loss value (− 59.3 dB), broadband wave absorption (5.6 GHz at 2.2 mm thickness), and low radar cross-section value were achieved. Materials exhibiting high-performance electromagnetic wave absorption have garnered considerable scientific and technological attention, yet encounter significant challenges. Developing new materials and innovative structural design concepts is crucial for expanding the application field of electromagnetic wave absorption. Particularly, hierarchical structure engineering has emerged as a promising approach to enhance the physical and chemical properties of materials, providing immense potential for creating versatile electromagnetic wave absorption materials. Herein, an exceptional multi-dimensional hierarchical structure was meticulously devised, unleashing the full microwave attenuation capabilities through in situ growth, self-reduction, and multi-heterogeneous interface integration. The hierarchical structure features a three-dimensional carbon framework, where magnetic nanoparticles grow in situ on the carbon skeleton, creating a necklace-like structure. Furthermore, magnetic nanosheets assemble within this framework. Enhanced impedance matching was achieved by precisely adjusting component proportions, and intelligent integration of diverse interfaces bolstered dielectric polarization. The obtain Fe 3 O 4 -Fe nanoparticles/carbon nanofibers/Al-Fe 3 O 4 -Fe nanosheets composites demonstrated outstanding performance with a minimum reflection loss (RL min ) value of − 59.3 dB and an effective absorption bandwidth (RL ≤  − 10 dB) extending up to 5.6 GHz at 2.2 mm. These notable accomplishments offer fresh insights into the precision design of high-efficient electromagnetic wave absorption materials.
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ISSN:2311-6706
2150-5551
2150-5551
DOI:10.1007/s40820-024-01396-3