Sandwich-like graphene nanosheets decorated with superparamagnetic CoFe₂O₄ nanocrystals and their application as an enhanced electromagnetic wave absorber

Abstract

Sandwich-structured CoFe2O4/graphene hybrids are fabricated through a facile one-pot polyol route, and the electromagnetic wave absorption properties are investigated.

Solvothermal synthesis and good microwave absorbing properties for magnetic porous-Fe3O4/graphene nanocomposites

“…26 Furthermore, the values of ε and ε for Fe 3 O 4 /GO composites decrease rapidly with increasing the frequency, which is similar with frequency dependent dielectric dispersion occurring in some carbon-based composites. 27 However, the two samples exhibit almost the same frequency-dependent complex permeability shown in Fig.…”

Synthesis of graphene–transition metal oxide hybrid nanoparticles and their application in various fields

“…The authors used a one-step hydrothermal method followed by annealing for the successful fabrication of the bicomponent CoO/CoFe 2 O 4 . Furthermore, this hybrid has been used for microwave absorption applications and as electromagnetic wave absorbers [327]. Li et al developed a facile one-pot polyol strategy to fabricate sandwich structures of graphene nanosheets decorated with CoFe 2 O 4 superparamagnetic NCs [327].…”

“…Furthermore, this hybrid has been used for microwave absorption applications and as electromagnetic wave absorbers [327]. Li et al developed a facile one-pot polyol strategy to fabricate sandwich structures of graphene nanosheets decorated with CoFe 2 O 4 superparamagnetic NCs [327]. The enhancement of the electromagnetic wave absorption properties of CoFe 2 O 4 by the introduction of graphene is due to the synergistic effect between the remarkable magnetic loss from the superparamagnetic CoFe 2 O 4 nanocrystals and high electric loss from the lightweight graphene.…”

Significant promotion of porous architecture and magnetic Fe3O4 NPs inside honeycomb-like carbonaceous composites for enhanced microwave absorption

“…38 Therefore, even though WC-600 has high permittivity, it might exhibit poor microwave absorption performance owing to poor impedance matching. In comparison, the 41 The presence of Fe 3 O 4 nanoparticles decorated on the surface of porous carbon leads to the generation of more space charge and its accumulation at the interface, which contributes to higher microwave absorption in the composite. …”