Abstract
Matrimony vine-like α-Fe2O3/reduced graphene oxide have been prepared by a facile method, followed by transformation into Fe3O4/reduced graphene oxide through annealing at 500 °C with the particle size and morphology significantly unchanged. By changing the mass ratio of iron oxide, the hybrids display optimal electromagnetic wave absorption performance. The maximum reflection loss value of α-Fe2O3/reduced graphene oxide is −46.6 dB at 5.6 GHz with a thickness of 4.0 mm and the highest effective absorption bandwidth reaches 4.9 GHz at the thickness of 1.8 mm. Interestingly, after annealing treatment, the hybrids in which α-Fe2O3 were converted into Fe3O4 exhibit an effective absorption bandwidth of 4.6 GHz and the maximum reflection loss value reaches −42.8 dB at 13.3 GHz with the thickness of only 1.8 mm, indicating Fe3O4/reduced graphene oxide can be used as an efficient electromagnetic wave absorbing material in high temperature and moisture environment, where Fe3O4 will be oxidized into α-Fe2O3. Results show the enhancement of electromagnetic wave absorption performance originates from synergistic effects of dielectric loss and magnetic loss. Our study provides a potential method for preparing environmental resistance electromagnetic wave absorbing materials.
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