▎ 摘　　要

Fe-doped NiO@SiO2@graphene nanocomposites have been successfully fabricated for the first time, in which Fe-doped NiO nanoparticles are about 3 nm in diameter. In order to measure their electromagnetic properties, Fe-doped NiO@SiO2@graphene (25 wt%) wax composites were then prepared. The experimental results show that Fe-doped NiO@SiO2@graphene nanocomposites exhibit significantly enhanced microwave absorption performance in terms of both the maximum reflection loss value and the absorption bandwidth in comparison with NiO@SiO2@graphene. The maximum reflection loss of Fe-doped NiO@SiO2@graphene nanocornposites can reach -51.2 dB at 8.6 GHz with a thickness of 4mm, and the absorption bandwidth with the reflection loss below -10dB is 4GHz (from 7 to 11 GHz). Therefore, this kind of nanocomposites may have the potential as high-efficient absorbers for microwave absorption applications. (C) 2013 Elsevier B.V. All rights reserved.