Enhanced electromagnetic wave absorption of multicore Fe4N@N-doped porous carbon core-shell microspheres through dielectric-magnetic coordination

IF 11.6 2区材料科学 Q1 CHEMISTRY, PHYSICAL Carbon Pub Date : 2025-02-27 DOI:10.1016/j.carbon.2025.120176

Shuting Zhang , Chengguo Wang , Xiangwei Meng , Siyu Liu , Xiaoyu Li , Zhiqiang Yao , Meijie Yu

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Abstract

With the vigorous development of nanotechnology, precise control of composition and structure in carbon-coated magnetic core-shell materials for efficient electromagnetic wave absorption is an attractive research direction. In this work, multi-core Fe₄N@N-doped porous carbon core-shell microspheres (p-FCNS) were successfully synthesized using a controllable method to achieve excellent electromagnetic wave absorption performance at a thin matching thickness. p-FCNS offered multiple advantages due to the transformation of the Fe₄N phase and porous carbon matrix: (I) excellent magnetic loss and charge conduction ability; (II) optimized impedance matching; and (III) enhanced interfacial polarization and other attenuation mechanisms. Through the synergistic effect of magnetic-dielectric loss, p-FCNS realized a minimum reflection loss of −57.61 dB (at 1.74 mm) and an optimal absorption bandwidth of 5.27 GHz (at 1.68 mm). Therefore, this work substantiated the significant potential of Fe₄N@porous carbon composites for the application of electromagnetic wave absorption, and provided novel insights into the composition and structure control of high-performance electromagnetic wave absorption materials.

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通过介电磁性配位增强多核 Fe4N@N 掺杂多孔碳核壳微球的电磁波吸收能力

随着纳米技术的蓬勃发展，精确控制碳包覆磁性核壳材料的组成和结构以实现电磁波的高效吸收是一个有吸引力的研究方向。本文采用可控方法成功合成了多芯Fe4N@N-doped多孔碳核壳微球（p-FCNS），在较薄的匹配厚度下获得了优异的电磁波吸收性能。由于Fe4N相和多孔碳基体的转变，p-FCNS具有多种优势：(1)优异的磁损失和电荷传导能力；（二）阻抗匹配优化；（三）界面极化增强等衰减机制。通过磁介质损耗的协同效应，p-FCNS的最小反射损耗为- 57.61 dB (1.74 mm)，最佳吸收带宽为5.27 GHz （1.68 mm）。因此，本工作证实了Fe4N@porous碳复合材料在电磁波吸收应用方面的巨大潜力，并为高性能电磁波吸收材料的组成和结构控制提供了新的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Carbon 工程技术-材料科学：综合

CiteScore

20.80

自引率

7.30%

发文量

审稿时长

23 days

期刊介绍： The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.