Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 785, Issue -, Pages 616-626Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.01.227
Keywords
Multi-walled carbon nanotubes; Cerium oxide; Nanocomposites; Electromagnetic absorption; Oxygen vacancy
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Funding
- National Natural Science Foundation of China [51507003]
- Lift Engineering of Young Talents and Doctor's Start-up Research Foundation of Anhui University of Science and Technology [ZY537]
- Program of Innovation and Entrepreneurship for Undergraduates of Anhui Province [201710361261, 201710361280, 201710361283]
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Herein, cerium oxide nanoparticles decorated multi-walled carbon nanotubes (MWCNTs) nano-composites were successfully synthesized by a facile one-step hydrothermal route. The structure, compositions, micromorphology and electromagnetic parameters of the obtained nanocomposites were carefully characterized. Results revealed that the well-designed three-dimensional (3D) conductive networks and rich oxygen vacancy defects were formed in situ in the as-prepared nano-composites, which were beneficial to the electromagnetic wave (EMW) absorption. Remarkably, the binary nanocomposite with the additive amount of MWCNTs of 45 mg exhibited the minimum reflection loss (RLmin) of -51.1 dB and effective absorption bandwidth (EAB, RL less than -10 dB) of 3.4 GHz (7.8-11.2 GHz) with a thin thickness of 2.6 mm. Furthermore, the EAB could reach 14.16 GHz (88.5% of 2-18 GHz) by facilely adjusting the coating thicknesses from 1.5 to 5 mm, which spanned the whole C, X and Ku bands. Besides, the influence of the additive amounts of MWCNTs on the EMW absorption performance was investigated and the possible EMW absorption mechanism was proposed. It was believed that this work could shed light on the designing novel MWCNTs-based nanocomposites as the high-efficiency EMW absorbers. (C) 2019 Elsevier B.V. All rights reserved.
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