Abstract
Exploring lightweight electromagnetic wave absorption materials is urgently needed to satisfy the miniaturization and integration of artificial intelligence and 5G technologies. Herein, nitrogen-doped graphene (N-GN) is successfully fabricated through a simple hydrothermal method, which can float in the water. Except for keeping the sheet-like structure of GO, nitrogen-doped graphene shows a reticular-like structure with more wrinkles and crinkles, which is crossed and interconnected to each other. The introduced nitrogen heteroatoms may induce dipole polarization, and the special interconnected reticular-like structure may improve the energy dissipation capacity. These features make nitrogen-doped graphene process improved dielectric loss and enhanced electromagnetic wave absorption performance. When the mass fraction of N-GN is only 10 wt%, N-GN shows a maximum reflection loss value of − 21.7 dB at 14.3 GHz with an absorber thickness of only 1.78 mm. This work indicates that nitrogen-doped graphene is a good candidate of lightweight dielectric materials.
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Acknowledgements
This work is supported by National Natural Science Foundation of China (51572218, 11904275), Natural Science Foundation from Department of Science and Technology of Shaanxi Province (2021JQ-431, 2021JM-304, 2021JQ-427) and Scientific Research Program Funded by Shaanxi Provincial Education Department (20JK0946).
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Feng, W., Zhou, Y., Xing, H. et al. Hydrothermal synthesis of nitrogen-doped graphene as lightweight and high-efficient electromagnetic wave absorbers. J Mater Sci: Mater Electron 32, 26116–26125 (2021). https://doi.org/10.1007/s10854-021-06340-4
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DOI: https://doi.org/10.1007/s10854-021-06340-4