A novel efficient electromagnetic absorber with MoO_3@Fe_2(MoO_4)_3 core-shell nanobelts insert in reduced graphene oxide nanosheets

摘要

A composite of MoO3@Fe-2(MoO4)(3) and reduced graphene oxide (rGO) (MoO3@Fe-2(MoO4)(3)/rGO) was prepared for application as a high-efficiency electromagnetic wave (EMW) absorbing material. MoO3 acted as the core that forms a conductive network between the rGO layers and Fe-2(MoO4)(3) acted as the shell of the MoO3@Fe-2(MoO4)(3) heterostructure that consumes the incident EMW by magnetic loss. The relationship between the chemical composition, micromorphology, and absorption performance of the composite was investigated in detail. The MoO3@Fe-2(MoO4)(3)/rGO-30 wt% composite with a thickness of 1.91 mm showed a minimum reflection loss of-71.3 dB at 14.4 GHz and an effective absorption bandwidth of up to 5.8 GHz (12.2-18.0 GHz). This study provides a new pathway for the synthesis of novel effective EMW-absorbing materials with low thickness, high strength, large bandwidth, and light weight.