Journal
APPLIED SURFACE SCIENCE
Volume 592, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2022.153324
Keywords
Hierarchical nanocomposites; Absorbing material; Attenuation mechanism; One-dimensional; Heterostructure
Categories
Funding
- National Natural Sci-ence Foundation of China [52072196, 52002199, 52002200, 52102106]
- Major Basic Research Program of Natural Science Foundation of Shandong Province [ZR2020ZD09]
- Natural Science Foundation of Shandong Province [ZR2019BEM042, ZR2020QE063]
- Innovation and Technology Pro-gram of Shandong Province [2020KJA004]
- Taishan Scholars Program of Shandong Province [ts201511034]
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In this study, SiCNWS@Ni-Co2O4@PANI one-dimensional (1D) hierarchical nanocomposites were successfully prepared, and they exhibited excellent electromagnetic wave absorption properties through their hierarchical microstructure, diverse components, and heterogeneous interface.
Developing a novel electromagnetic wave absorbing material with excellent absorption properties is an optimal solution to deal with increasingly serious electromagnetic radiation and pollution. Herein, the SiCNWS@Ni-Co2O4@PANI one dimensional (1D) hierarchical nanocomposites were successfully prepared through modifying NiCo2O4 nanosheets and PANI coatings on the surface of the as-prepared SiC nanowires. Under the synergistic contribution of the peculiar hierarchical microstructure, diverse components and heterogeneous interface, the dipole polarization and polarization relaxation of the SiCNWS@NiCo2O4@PANI 1D hierarchical nanocomposites were enhanced greatly, which aroused stronger attenuation capacity and better impedance matching, and further obtained high-efficiency electromagnetic wave absorption properties. The minimum reflection loss value of-53.74 dB was achieved at a matching thickness of 1.96 mm, meanwhile, the widest effective absorption band of 4.16 GHz was measured at an ultra-thin matching thickness of 1.18 mm, suggesting that the nanocomposites could be an attractive candidate electromagnetic wave absorbing material. According to systematic character-ization, a reasonable electromagnetic wave loss mechanism was proposed to elucidate the attenuation modes of the incident electromagnetic wave.
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