Preparation of bunched CeO2 and study on microwave absorbing properties with MWCNTs binary composite--颗粒学报PARTICUOLOGY

Guo, Y., Song, X., Ma, S., Qi, Y., Yuan, X., & Fan, H. (2023). Preparation of bunched CeO2 and study on microwave absorbing properties with MWCNTs binary composite. Particuology, 73, 95-102. https://doi.org/10.1016/j.partic.2022.04.002

Preparation of bunched CeO₂ and study on microwave absorbing properties with MWCNTs binary composite

Yingjie Guo, Xiangrui Song, Sihang Ma, Yinghe Qi, Xiaotao Yuan ^*, Huili Fan ^*

School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China

10.1016/j.partic.2022.04.002

Volume 73, February 2023, Pages 95-102

Received 11 March 2022, Revised 2 April 2022, Accepted 13 April 2022, Available online 4 May 2022, Version of Record 24 May 2022.

E-mail: yuanxt@ustb.edu.cn; fanhl@sas.ustb.edu.cn

Highlights

• A new type of bunched CeO₂ was prepared by facile hydrothermal method.

• MWCNTs were scattered on surface of bunched CeO₂ in CeO₂/MWCNTs composite.

• Optimal reflection loss reached −45.72 dB.

• Reflection loss was less than −30 dB in the thickness range of 5.0–7.5 mm at 11.36–17.77 GHz.

Abstract

A novel bunched cerium oxide (CeO₂) was prepared and its binary composite material with multi-walled carbon nanotubes presented an excellent microwave absorbing properties. The morphology, structure, and absorbing properties of the composite material were investigated. It was found that the minimum reflection loss (RL) of the composite material at 15.79 GHz was −45.7 dB when the thickness was 5.5 mm. It was worth noting that when the composite material was in the thickness range of 5.0–7.5 mm and the frequency was 11.36–17.77 GHz, the electromagnetic wave RL was < −30 dB, which illustrated that the composite material had a good absorbing effect over a wide thickness range. The results of the study contributed to the design and preparation of efficient microwave absorbing materials (MAM) with rare earth oxide composites and their applications, which demonstrated the importance of new composites with special structures in the field of MAM.

Graphical abstract

Keywords

Bunched cerium oxide; Microwave absorbing material; Multi-walled carbon nanotubes

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