Enhanced microwave absorption performance of nitrogen-doped porous carbon dodecahedrons composite embedded with ceric dioxide |
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| Affiliation: | 1. School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China;2. State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, China;3. Anhui International Joint Research Center for Nano Carbon-based Materials and Environmental Health, Anhui University of Science and Technology, Huainan 232001, Anhui, China;4. College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, Guangdong, China;5. Anhui Nandu Huabo New Material Technology Co., Jieshou 236500, Anhui, China |
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| Abstract: | CeO2/Co/C dodecahedrons composites with excellent microwave absorption performance were synthesized by using a hydrothermal method. ZIF-67/CeO2 was first prepared by introducing CeO2 into the precursor of ZIF-67 and then CeO2/Co/C composite was obtained after heat treatment. Impedance matching of the samples could be well adjusted by controlling the content of CeO2. Unique dodecahedral structure for more interfacial reflection and cerium dioxide oxygen vacancies enhance microwave absorption performance. Specifically, the CeO2/Co/C exhibited a minimum reflection loss of ?68.83 dB is observed at 5.92 GHz, while the thickness was 3.69 mm. The introduction of CeO2 effectively enhanced the impedance matching of the materials and improved the microwave absorption performance. Therefore, this CeO2/Co/C composite is a promising microwave absorber material with high performance. |
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| Keywords: | Carbon/magnetic metal composites Microwave absorption Impedance matching Cerium dioxide |
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