Customizing Heterointerfaces in Multilevel Hollow Architecture Constructed by Magnetic Spindle Arrays Using the Polymerizing-Etching Strategy for Boosting Microwave Absorption

被引：154

作者：

Xu, Chunyang ^{[1
]}

Liu, Panbo ^{[2
]}

Wu, Zhengchen ^{[1
]}

Zhang, Huibin ^{[1
]}

Zhang, Ruixuan ^{[1
]}

Zhang, Chang ^{[1
]}

Wang, Lei ^{[1
]}

Wang, Longyuan ^{[1
]}

Yang, Bingtong ^{[1
]}

Yang, Ziqi ^{[1
]}

You, Wenbin ^{[1
]}

Che, Renchao ^{[1
,3
]}

机构：

[1] Fudan Univ, Dept Mat Sci, Shanghai Key Lab Mol Catalysis & Innovat Mat, Lab Adv Mat, Shanghai 200438, Peoples R China

[2] Northwestern Polytech Univ, Sch Chem & Chem Engn, Xian 710129, Peoples R China

[3] Zhejiang Lab, Joint Res Ctr Computat Mat, Hangzhou 311100, Peoples R China

来源：

ADVANCED SCIENCE | 2022年 / 9卷 / 17期

基金：

中国国家自然科学基金;

关键词：

heterointerfaces; microtube; microwave absorption; multilevel hollow architecture; nanospindle arrays; MICROSPHERES; PERFORMANCE; COMPOSITES;

D O I：

10.1002/advs.202200804

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Heterointerface engineering is evolving as an effective approach to tune electromagnetic functional materials, but the mechanisms of heterointerfaces on microwave absorption (MA) remain unclear. In this work, abundant electromagnetic heterointerfaces are customized in multilevel hollow architecture via a one-step synergistic polymerizing-etching strategy. Fe/Fe3O4@C spindle-on-tube structures are transformed from FeOOH@polydopamine precursors by a controllable reduction process. The impressive electromagnetic heterostructures are realized on the Fe/Fe3O4@C hollow spindle arrays and induce strong interfacial polarization. The highly dispersive Fe/Fe3O4 nanoparticles within spindles build multi-dimension magnetic networks, which enhance the interaction with incident microwaves and reinforce magnetic loss capacity. Moreover, the hierarchically hollow structure and electromagnetic synergistic components are conducive to the impedance matching between absorbing materials and air medium. Furthermore, the mechanisms of electromagnetic heterointerfaces on the MA are systematically investigated. Accordingly, the as-prepared hierarchical Fe/Fe3O4@C microtubes exhibit remarkable MA performance with a maximum refection loss of -55.4 dB and an absorption bandwidth of 4.2 GHz. Therefore, in this study, the authors not only demonstrate a synergistic strategy to design multilevel hollow architecture, but also provide a fundamental guide in heterointerface engineering of highly efficient electromagnetic functional materials.

引用

页数：11

共 54 条

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