首页|Dual template-derived 3D porous Co6Mo6C2/Mo2C@NC framework for electromagnetic wave response and multifunctional applications

Dual template-derived 3D porous Co6Mo6C2/Mo2C@NC framework for electromagnetic wave response and multifunctional applications

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The swift advancement of electronics technology has led to a burgeoning interest in multifunctionaliz-ing electromagnetic wave(EMW)absorption materials as a prospective avenue for future development.However,the effective integration of diverse functions within a single material continues to present chal-lenges.This work successfully fabricated a three-dimensional(3D)porous Co6Mo6C2/Mo2C@NC frame-work with carbon microspheres through uncomplicated freeze-drying and high-temperature pyrolysis techniques.The resultant magnetic bimetallic carbide(Co6Mo6C2 and Mo2C)nanoparticles are uniformly and densely embedded within the carbon layer,facilitated jointly by a rigid template(molybdenum salt)and a flexible template(glucose),thus realizing an exceptional dual loss mechanism involving dielectric and magnetic components.The establishment of the 3D porous conductive network enhances EMW ab-sorption through multiple reflections and scattering mechanisms.Impressively,the Co6Mo6C2/Mo2C@NC framework attains remarkable EMW absorption characteristics with ultralightweight(0.1567 g cm-3),ul-trathin matching thickness(1.7 mm),and robust absorption(reflection loss RL value of-65.89 dB).Fur-thermore,it achieves a noteworthy effective absorption bandwidth(EAB,RL ≤-10 dB)spanning 6.4 GHz,ensuring complete absorption of 100％within the X band(8-12 GHz)at a matching thickness of 2 mm.In addition,the Co6Mo6C2/Mo2C@NC framework exhibits pronounced hydrophobicity and magnetic respon-siveness,bestowing upon it appealing attributes including self-cleaning,flame retardancy,and thermal insulation,on par with those observed in commercial products.The radar cross-sectional area(RSC)re-duction value of the Co6Mo6C2/Mo2C@NC framework can reach 35.2 dB m2 by RSC simulation,which can effectively lower the likelihood of detection by radar detectors for the target.This study presents a viable strategy for the advancement of novel lightweight and multifunctional materials that demonstrate exceptional performance in absorbing electromagnetic waves.

Dual templateWide broadbandElectromagnetic wave absorptionMultifunctionalisationFlame retardant

Ya Ning、Xiaojun Zeng、Xiawen Peng、Xiao Jiang、Zong-Yang Shen、Chongbo Liu、Ronghai Yu

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National Engineering Research Center for Domestic & Building Ceramics,School of Materials Science and Engineering,Jingdezhen Ceramic University,Jingdezhen 333403,China

School of Environmental and Chemical Engineering,Nanchang Hangkong University,Nanchang 330063,China

School of Materials Science and Engineering,Beihang University,Beijing 100191,China

National Natural Science Foundation of ChinaJiangxi Provincial Natural science FoundationTraining Program for Academic and Technical Leaders of Major Disciplines in Jiangxi ProvinceScience and Technology Project of Jiangxi Provincial Department of EducationOpening Project of National Engineering Research Center for Domestic & Building CeramicsGraduate Innovation Fund of Jiangxi Province

2226901020224BAB21402120212BCJ23020GJJ211305GXZX2302YC2023-S799

2024

10.1016/j.jmst.2023.10.063

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.187(20)
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