Enhanced electromagnetic wave absorption performance of core-shell Fe3O4@poly(3,4-ethylenedioxythiophene) microspheres/reduced graphene oxide composite

Abstract Core-shell Fe3O4@poly(3,4-ethylenedioxythiophene) (PEDOT) microspheres are compounded with reduced graphene oxide (rGO) to prepare Fe3O4@PEDOT/rGO composite as an efficient electromagnetic (EM) wave absorber. The microstructure, element composition, morphology and saturation magnetization are characterized, and EM wave absorption properties are analyzed in the frequency range of 2.0∼18.0 GHz. The results show that PEDOT is polymerized on the surface of Fe3O4 microspheres, and prepared core-shell microspheres are supported on rGO nanosheets. The reflection loss (RL) of Fe3O4@PEDOT/rGO composite is -48.8 dB at 9.12 GHz, and effective absorption bandwidth (EAB) (RL