Low-Temperature Oxidation Induced Phase Evolution with Gradient Magnetic Heterointerfaces for Superior Electromagnetic Wave Absorption

被引：51

作者：

He, Zizhuang ^{[1
]}

Shi, Lingzi ^{[1
]}

Sun, Ran ^{[1
]}

Ding, Lianfei ^{[1
]}

He, Mukun ^{[1
]}

Li, Jiaming ^{[1
]}

Guo, Hua ^{[1
]}

Gao, Tiande ^{[2
]}

Liu, Panbo ^{[1
]}

机构：

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

[2] Northwestern Polytech Univ, Sch Marine Sci & Technol, Xian 710072, Peoples R China

来源：

NANO-MICRO LETTERS | 2025年 / 17卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Magnetic heterointerfaces; Phase evolution; Interfacial polarization; Magnetic coupling; Electromagnetic wave absorption; MICROWAVE; MICROSPHERES; COMPOSITES; CO/C;

D O I：

10.1007/s40820-024-01516-z

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Co/Co3O4@NC nanosheets with gradient magnetic heterointerfaces have been fabricated by the high-temperature carbonization/low-temperature oxidation processes.Experimental and theoretical simulation results indicate that magnetic heterointerfaces engineering is beneficial for optimizing impedance matching and promoting electromagnetic wave absorption.Gradient magnetic heterointerfaces with magnetic-heteroatomic components realize the adjustment of interfacial polarization, magnetic coupling, and long-range magnetic diffraction. Gradient magnetic heterointerfaces have injected infinite vitality in optimizing impedance matching, adjusting dielectric/magnetic resonance and promoting electromagnetic (EM) wave absorption, but still exist a significant challenging in regulating local phase evolution. Herein, accordion-shaped Co/Co3O4@N-doped carbon nanosheets (Co/Co3O4@NC) with gradient magnetic heterointerfaces have been fabricated via the cooperative high-temperature carbonization and low-temperature oxidation process. The results indicate that the surface epitaxial growth of crystal Co3O4 domains on local Co nanoparticles realizes the adjustment of magnetic-heteroatomic components, which are beneficial for optimizing impedance matching and interfacial polarization. Moreover, gradient magnetic heterointerfaces simultaneously realize magnetic coupling, and long-range magnetic diffraction. Specifically, the synthesized Co/Co3O4@NC absorbents display the strong electromagnetic wave attenuation capability of - 53.5 dB at a thickness of 3.0 mm with an effective absorption bandwidth of 5.36 GHz, both are superior to those of single magnetic domains embedded in carbon matrix. This design concept provides us an inspiration in optimizing interfacial polarization, regulating magnetic coupling and promoting electromagnetic wave absorption.

引用

页数：14

共 55 条

[51] New generation electromagnetic materials: harvesting instead of dissipation solo [J].

Zhang, Yali ;

Kong, Jie ;

Gu, Junwei .

SCIENCE BULLETIN, 2022, 67 (14) :1413-1415

[52] A Perspective for Developing Polymer-Based Electromagnetic Interference Shielding Composites [J].

Zhang, Yali ;

Gu, Junwei .

NANO-MICRO LETTERS, 2022, 14 (01)

[53] Growth of magnetic metals on carbon microspheres with synergetic dissipation abilities to broaden microwave absorption [J].

Zhao, Biao ;

Li, Yang ;

Zeng, Qingwen ;

Fan, Bingbing ;

Wang, Lei ;

Zhang, Rui ;

Che, Renchao .

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2022, 107 :100-110

[54] Galvanic Replacement Reaction Involving Core-Shell Magnetic Chains and Orientation-Tunable Microwave Absorption Properties [J].

Zhao, Biao ;

Li, Yang ;

Zeng, Qingwen ;

Wang, Lei ;

Ding, Jingjun ;

Zhang, Rui ;

Che, Renchao .

SMALL, 2020, 16 (40)

[55] Heterostructured BN@Co-C@C Endowing Polyester Composites Excellent Thermal Conductivity and Microwave Absorption at C Band [J].

Zhong, Xiao ;

He, Mukun ;

Zhang, Chenyang ;

Guo, Yongqiang ;

Hu, Jinwen ;

Gu, Junwei .

ADVANCED FUNCTIONAL MATERIALS, 2024, 34 (19)

← 1 2 3 4 5 6 →