Synthesis of carbon/SiO2 core-sheath nanofibers with Co-Fe nanoparticles embedded in via electrospinning for high-performance microwave absorption

As an excellent microwave absorption material, the in-depth study of carbon-based nanofibers’ absorbing mechanism is of great significance for subsequent applications. In this paper, carbon/SiO2 core-sheath nanofibers with Co-Fe nanoparticles embedded in were synthesized by electrospinning and carbonization. The morphology, microstructure, magnetic properties, and microwave absorption performance of the composite nanofibers were characterized in detail. The results show that the maximum reflection loss (RL) could reach to −59.6 dB, and the maximum effective absorption bandwidth (RL