通过形成 COF 衍生碳复合材料 Fe/Fe3C 的磁电协同效应优化电磁波吸收特性

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-01-13 DOI:10.1016/j.cej.2025.159457

Zhongyu Deng, Lei Wang, Biyun Peng, Lisheng Ye, Zhengxing Li, Ziyuan Shi, Weiwei Dong, Changcai Chen, Yifeng Hu, Sajjad Ur Rehman

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引用次数: 0

摘要

采用高温碳化和超声辅助技术成功合成了Fe/Fe3C@SiO2@C复合材料。具有磁损耗的Fe/Fe3C磁芯与具有介电损耗的多孔碳壳实现了磁电协同作用。氨基功能化SiO2作为原位合成共价有机骨架（COF）材料的精确模板。由cof衍生的多孔外碳壳和SiO2中间层组成的双壳层结构不仅优化了阻抗匹配，而且促进了电磁波的多次反射和散射，从而有效地衰减了EMW。实验结果表明，Fe/Fe3C@SiO2@C复合材料具有出色的EMW吸收能力，在厚度为1.24 mm时，最小反射损耗（RLmin）为−48.68 dB，有效吸收带宽(EAB, RL <；−10 dB) 3.74 GHz。本研究为模板制备COF复合材料在EMW吸收领域的应用提供了新的前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Optimization of electromagnetic wave absorption properties by formation of magnetoelectric synergistic effect of COF-derived carbon composite Fe/Fe3C

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Optimization of electromagnetic wave absorption properties by formation of magnetoelectric synergistic effect of COF-derived carbon composite Fe/Fe3C

The Fe/Fe₃C@SiO₂@C composites were successfully synthesized using high-temperature carbonization and ultrasonic-assisted techniques. The Fe/Fe₃C core with magnetic loss and the porous carbon shell with dielectric loss achieve magnetoelectric synergy. The amino-functionalized SiO₂ acts as a precise template for the in-situ synthesis of covalent organic framework (COF) materials. The double-shell-layer structure, comprising the COF-derived porous outer carbon shell and the SiO₂ intermediate layer, not only optimizes impedance matching but also promotes multiple reflections and scattering of electromagnetic waves (EMW), thereby effectively attenuating EMW. The experimental results indicate that the Fe/Fe₃C@SiO₂@C composites possess outstanding EMW absorption capabilities, achieving a minimum reflection loss (RL_min) of −48.68 dB at a thickness of 1.24 mm, and an effective absorption bandwidth (EAB, RL < −10 dB) of 3.74 GHz. This research offers new perspectives on the utilization of template-prepared COF composites in the domain of EMW absorption.

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.