Design and synthesis of one-dimensional magnetic composites with Co nanoparticles encapsulated in carbon nanofibers for enhanced microwave absorption

Mingliang Ma; Jinhu Hu; Xukang Han; Jiao Liu; Jialin Jiang; Chao Feng; Yongbo Hou; Yong Ma

doi:10.1016/j.jcis.2023.08.031

Design and synthesis of one-dimensional magnetic composites with Co nanoparticles encapsulated in carbon nanofibers for enhanced microwave absorption

J Colloid Interface Sci. 2023 Dec 15;652(Pt A):680-691. doi: 10.1016/j.jcis.2023.08.031. Epub 2023 Aug 7.

Authors

Mingliang Ma¹, Jinhu Hu¹, Xukang Han¹, Jiao Liu¹, Jialin Jiang¹, Chao Feng², Yongbo Hou¹, Yong Ma³

Affiliations

¹ School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, Shandong, China.
² School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, Shandong, China. Electronic address: fengchao@qut.edu.cn.
³ School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China. Electronic address: courage2010@126.com.

PMID: 37573239
DOI: 10.1016/j.jcis.2023.08.031

Abstract

With the increased usage of electromagnetic microwaves (EM) in wireless communication technology, the problem of electromagnetic radiation pollution has grown dramatically. This study successfully prepared novel Co/C magnetic nanocomposite fibers for EM absorption using the electrospinning and carbonization methods. The morphology, composition, magnetic properties, and EM absorption performance were extensively characterized. This material shows exceptional EM absorption performance, achieving -72.01 dB (at 2.08 mm) for minimum reflection loss (RL_min) and 5.4 GHz (at 1.68 mm) for effective absorption bandwidth (EAB). The performance surpasses not only any single precursor but also stands as the best in similar investigations. It can be attributed to the microstructure of magnetic Co nanoparticles encapsulated in carbon nanofibers and the macrostructure of cross-linked three-dimensional (3D) conductive networks. The combination of these structures resulted in excellent dielectric loss, magnetic loss, and impedance matching. This research offers new insights into the production of one-dimensional (1D) carbon-based absorbers, while also establishing a theoretical foundation for exploring the application potential of this material. These findings may contribute to the development of more efficient and practical EM absorption materials in the future.

Keywords: Co/C nanofibers; Electrospinning; Microwave absorption; One-dimensional.