Enhanced electromagnetic absorption properties of reduced graphene oxide-polypyrrole with NiFe_2O_4 particles prepared with simple hydrothermal method

摘要

The ternary composites of reduced graphene oxide-polypyrrole-NiFe_2O_4 (RGO-PPy-NiFe_2O_4) were synthesized via a two-step method and the electromagnetic absorption properties were investigated. The average diameter of NiFe_2O_4 particles on RGO-PPy ranged from 10 to 20 nm. The results revealed that the electromagnetic absorption properties and the absorption bandwidth of RGO-PPy-NiFe_2O_4 are much better than RGO-PPy. The maximum reflection loss of RGO-PPy-NiFe_2O_4 is -44.7 dB at 14.9 GHz and the absorption bandwidth with the reflection loss below -10 dB is 4.7 GHz with a thickness of 1.75 mm. Furthermore, our strategy provides a feasible method to obtain the ternary composites with excellent electromagnetic absorption properties and wide absorption bandwidth for future investigators.