writer：Yue Wu, Ruiwen Shu*, Zhenyin Li, Changlian Guo, Gengyuan Zhang, Jiabin Zhang, Weijie Li
keywords：Nanocomposites, Electromagnetic wave absorption, Graphene, Carbon nanotubes, Nickel ferrite
source：期刊
specific source：Journal of Alloys and Compounds
Issue time：2019年

Herein, amphiphilic graphene oxide (GO) was used as the “surfactant” to directly disperse pristine multiwalled carbon nanotubes (MWCNTs) in aqueous dispersions and the reduced graphene oxide/multiwalled carbon nanotubes/nickel ferrite (RGO/MWCNTs/NiFe2O4) ternary nanocomposites were further synthesized by a facile one-pot hydrothermal strategy. The structure, compositions, micromorphology and electromagnetic parameters of the ternary nanocomposites were investigated by various analytical techniques. Experimental results revealed that the ternary nanocomposites exhibited the enhanced electromagnetic wave (EMW) absorption performance compared with the binary nanocomposite and single NiFe2O4. The minimum reflection loss (RLmin) reached
50.2 dB with a thin thickness of 1.4 mm and effective absorption bandwidth (EAB, RL 
10 dB) was 5.0 GHz (13e18 GHz). Meanwhile, the EAB could reach 14.64 GHz (91.5% of 2e18 GHz) by facilely adjusting the coating thicknesses from 1 to 5 mm. Furthermore, the possible EMW absorption mechanism was proposed. Besides, the EMW absorption performance was highly tunable by changing the additive amounts of MWCNTs, filler loading ratios and coating thicknesses. Our results could be helpful for designing and developing novel graphene-based high-performance EMW absorbers.