Constructing multiple heterogeneous interfaces in porous bimetallic FeNi3/C and CoNi/C flowers towards brilliant electromagnetic wave absorption performance

被引：36

作者：

Chen, Bingqian ^{[1
]}

Yun, Jiangni ^{[1
,3
]}

Zhao, Yu ^{[1
]}

Liu, Zhaolin ^{[1
]}

Yan, Junfeng ^{[1
]}

Deng, Zhouhu ^{[1
]}

Zhang, Han ^{[1
]}

Zhao, Wu ^{[1
]}

Wang, Gang ^{[2
]}

Zhang, Jiaxuan ^{[1
]}

机构：

[1] Northwest Univ, Sch Informat Sci & Technol, Xian 710127, Peoples R China

[2] Northwest Univ, Inst Photon & Photon Technol, Xian 710127, Peoples R China

[3] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

来源：

CARBON | 2023年 / 212卷

基金：

中国国家自然科学基金;

关键词：

Bimetallic MOF; NiFe-LDH; Heterogeneous interfaces; Electromagnetic wave absorption; CARBON NANOPARTICLES; COMPOSITE; MICROSPHERES; ABSORBER; MOFS;

D O I：

10.1016/j.carbon.2023.118108

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Construction of materials with multiple interfaces has always been a significant research direction to the highperformance electromagnetic wave (EMW) absorption materials. Here, the composites, consisted of threedimensional (3D) flower-like NiFe layered double hydroxide (LDH) and regular dodecahedron CoNi-MOF, are synthesized at the first time, and their electromagnetic absorption capacity can be efficaciously improved by altering the proportion of NiFe-LDH (NFL) and CoNi-MOF. Benefiting from the suitable ratio of constituents, at a matching thickness of 2.29 mm, the minimum reflection loss (RLmin) of Z@NFL-2 is -61.87 dB, and the effective absorption bandwidth (EAB, RLmin < -10 dB) is reach up to 6.1 GHz. Especially, Z@NFL-4 can obtain a large EAB of 7.23 GHz (10.77-18 GHz) at a thickness of only 2.06 mm. Amazingly, under the far domain circumstance, the lowest radar cross-section acreage can accomplish -44.72 dB m2. The remarkable EMW absorption performance is mainly attributed to the collaborative effect of abundant electrical-magnetic loss mechanism, and remarkable impedance matching characteristics. Therefore, this work furnishes a fresh idea for exploring the application of LDH-based materials in electromagnetic wave absorption filed.

引用

页数：14

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