首页|Inimitable 3D pyrolytic branched hollow architecture with multi-scale conductive network for microwave absorption

Inimitable 3D pyrolytic branched hollow architecture with multi-scale conductive network for microwave absorption

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To solve the electromagnetic pollution problem,the reasonable structure design and component control of the electromagnetic absorber is prominent.In this work,three-dimensional(3D)pyrolytic branched hollow architecture carbon PBHAC/MoS2 composites were prepared via a hydrothermal and calcina-tion two-step strategy.The narrow-gap nano-size MoS2 acquired after vulcanization and micro-size 3D branched carbon skeleton PBHAC possess intensified conduction losses.Particularly,the presence of po-tential differences between different phases creates a space charge region at the heterogeneous interface,resulting in strong interfacial polarization.The resulting 3D branched hollow PBHAC/MoS2 composites exhibit optimized impedance matching and multiple loss mechanisms.Finally,the 3D branched hollow carbon PBHAC/MoS2 composites have the best electromagnetic wave(EMW)absorption performance.The minimum reflection loss(RLmin)is-57.8 dB at 1.93 mm and the maximum effective absorption bandwidth(EABmax)is 6.08 GHz at 2 mm,which indicates the excellent EMW absorption performance of the com-posites.Accordingly,this composite is expected to be a microwave absorber with the characteristics of"thin,light,wide,and strong".

Dielectric lossMoS2Impedance matchingSchottky barrierMicrowave absorption

Jiajun Li、Qianqian Zhu、Jiahui Zhu、Yuhang Cheng、Zirui Jia、Feng Lu、Chao Wang、Guanglei Wu

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Institute of Materials for Energy and Environment,State Key Laboratory of Bio-fibers and Eco-textiles,College of Materials Science and Engineering,Qingdao University,Qingdao,266071,China

College of Chemistry and Chemical Engineering,Qingdao University,Qingdao,266071,China

Technical Center of Qingdao Customs,Qingdao,266002,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Shandong ProvinceNatural Science Foundation of Shandong ProvinceTaishan Scholars and Young Experts Program of Shandong ProvinceQingchuang Talents Induction Program of Shandong Higher Education InstitutionSpecial Financial of Shandong Province

52377026N5230119252002196ZR2019YQ24ZR2020QF084tsqn20210305737000022P990304116449

2024

10.1016/j.jmst.2023.06.066

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)：2024.173(6)
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