Facile synthesis and wide-band electromagnetic wave absorption properties of carbon-coated ZnO nanorods |
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| Authors: | Gengping Wan Kan Wang Lihong Wu Shaohua Shi Zhengyi He |
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| Affiliation: | 1. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, China;2. Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, Haikou, China;3. Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, Haikou, China |
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| Abstract: | In this work, a facile and scalable acetylene decomposition method was employed to synthesize carbon-coated ZnO (ZnO@C) nanorods. The characterization of morphology and structure analysis demonstrate that ZnO nanorod was well coated by an amorphous carbon shell with a thickness of about 20 nm. Comparted with ZnO, ZnO@C exhibit significantly enhanced microwave absorption properties. The effective absorption bandwidth with RL values exceeding –10 dB can reach 5.3 GHz for ZnO@C with a matching thickness of 2.5 mm. The excellent microwave absorption arose from enhanced dielectric loss caused by interfacial polarization, dipole polarization and the formation of conductive network. |
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| Keywords: | electromagnetic wave absorption carbon ZnO core-shell structure nanorods |
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