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Research Article

Facile fabrication of graphene/g-C3N4 for electromagnetic wave absorption

Qiang Su1,2, Yunfei He1, Dongdong Liu1( ), Daguang Li3, Long Xia1, Xiaoxiao Huang4, Bo Zhong1( )
School of Materials Science and Engineering, Harbin Institute of Technology Weihai, Weihai 264209, China
Weihai Yunshan Technology Co., Ltd., Weihai 264200, China
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science & Engineering, Jilin University, Changchun 130012, China
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
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Graphical Abstract

Graphene/g-C3N4 electromagnetic wave absorption material (EMWAM) was first synthesized, in which the g-C3N4 had a porous structure and dispersed on the surface of graphene. When the thickness is 2 mm, the effective absorption bandwidth (EAB) can reach 4.6 GHz, and when the thickness is 4.5 mm, the minimum reflection loss (RLmin) at 4.56 GHz can reach −34.69 dB.

Abstract

With the development of the miniaturization of electronic equipment and lightweight weapon equipment, there are new requirements for electromagnetic wave absorption material (EMWAM). EMWAM has outstanding electromagnetic wave absorption properties and lightweight characteristics become an important direction of research. In this study, graphene/g-C3N4 (GGCN) EMWAM was first synthesized in situ by simple heat treatment, in which the g-C3N4 had a porous structure and dispersed on the surface of graphene. The impedance matching of the GGCN was well adjusted by decreasing the dielectric constant and attenuation constant due to the g-C3N4 semiconductor property and the graphite-like structure. The EMW loss mechanism of GGCN was also analyzed by simulating GGCN’s electric field mode distribution and resistance loss power density. The analysis result shows that the distribution of g-C3N4 among GGCN sheets can produce more polarization effects and relaxation effects by increasing the lamellar spacing. Furthermore, the polarization loss of GGCN could be increased successfully by porous g-C3N4. Ultimately, the EMW absorption property of GGCN is optimized significantly, and GGCN exhibits excellent EMW absorption performance. When the thickness is 2 mm, the effective absorption bandwidth (EAB) can reach 4.6 GHz, and when the thickness is 4.5 mm, the minimum reflection loss (RLmin) at 4.56 GHz can reach −34.69 dB. Moreover, the practical application of EMWAM was studied by radar cross-section (RCS) simulation, showing that GGCN has a good application prospect.

Keywords

graphene/g-C3N4impedance matchingsimulation analysisdielectric lossexcellent electromagnetic wave absorption

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Nano Research
Volume 17 Issue 3,
March 2024
Pages 1687-1698
DOI: 10.1007/s12274-023-6231-z
Cite this article:
Su Q, He Y, Liu D, et al. Facile fabrication of graphene/g-C3N4 for electromagnetic wave absorption. Nano Research, 2024, 17(3): 1687-1698. https://doi.org/10.1007/s12274-023-6231-z
Topics:
Nanostructured materialsSurface structure
Part of a topical collection:
EM Wave Functional Materials

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Received: 22 August 2023
Revised: 20 September 2023
Accepted: 22 September 2023
Published: 02 December 2023
© Tsinghua University Press 2023
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