Highly efficient electromagnetic absorption on ZnN4-based MOFs-derived carbon composites

被引：47

作者：

Gao, Tong ^{[1
]}

Zhu, Zhenying ^{[1
]}

Li, Yixing ^{[1
]}

Hu, Haihua ^{[1
]}

Rong, Huawei ^{[1
]}

Liu, Weiwei ^{[2
]}

Yang, Tao ^{[2
]}

Zhang, Xuefeng ^{[1
,2
]}

机构：

[1] Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat MOE, Shenyang 110819, Peoples R China

[2] Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Inst Adv Magnet Mat, Hangzhou 310012, Peoples R China

来源：

CARBON | 2021年 / 177卷

基金：

中国国家自然科学基金;

关键词：

Electromagnetic wave absorption; Single atoms; Zn-N-4; sites; Dielectric polarizations; MICROWAVE ABSORBING PROPERTIES; FACILE SYNTHESIS; DIELECTRIC-PROPERTIES; NANOTUBES; NANOCOMPOSITES; ENHANCEMENT; ADSORPTION; HYDROGEN; ZIF-8;

D O I：

10.1016/j.carbon.2021.02.061

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：

Rapid expansion in microelectronic devices has accelerated considerable attention on the development of high-performance electromagnetic wave absorption materials. We herein reported a nitrogen-anchored Zn single atom microwave absorber derived from zeolitic imidazolate frameworks with high Zn-N-4 content (18.4%) and defect concentration (2.43 x 10(11) cm(-2)), thus featuring with remarkable dielectric loss tangent similar to 5.6. Theoretical calculations revealed that this significant enhancement was originated from the coordination structure of single zinc atoms localized within carbon matrix, associated with a high density of permanent electric dipoles that act as atomic-scale polarization sites under the alternating electromagnetic field. This work has important significance in understanding the physical origin of electromagnetic wave absorption for the MOFs and provides an alternative for designing the excellent electromagnetic wave absorption materials. (c) 2021 Elsevier Ltd. All rights reserved.

引用

页码：44 / 51

页数：8

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