Facile synthesis of iron oxides/reduced graphene oxide composites: application for electromagnetic wave absorption at high temperature

Scientific Reports
Lili ZhangChangle Chen

Abstract

Iron oxides/reduced graphene oxide composites were synthesized by facile thermochemical reactions of graphite oxide and FeSO4 · 7H2O. By adjusting reaction temperature, α-Fe2O3/reduced graphene oxide and Fe3O4/reduced graphene oxide composites can be obtained conveniently. Graphene oxide and reduced graphene oxide sheets were demonstrated to regulate the phase transition from α-Fe2O3 to Fe3O4 via γ-Fe2O3, which was reported for the first time. The hydroxyl groups attached on the graphene oxide sheets and H2 gas generated during the annealing of graphene oxide are believed to play an important role during these phase transformations. These samples showed good electromagnetic wave absorption performance due to their electromagnetic complementary effect. These samples possess much better electromagnetic wave absorption properties than the mixture of separately prepared Fe3O4 with rGO, suggesting the crucial role of synthetic method in determining the product properties. Also, these samples perform much better than commercial absorbers. Most importantly, the great stability of these composites is highly advantageous for applications as electromagnetic wave absorption materials at high temperatures.

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Citations

Apr 4, 2018·Nanomaterials·Guangxu HuangChuanxiang Zhang
Jul 10, 2018·Journal of the American Chemical Society·Artur KhannanovAyrat M Dimiev
Apr 1, 2020·ACS Applied Materials & Interfaces·Le QuanRodney S Ruoff
Aug 28, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Yi LuYu Pang

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Methods Mentioned

BETA
electron diffraction
electron hopping
X-ray
scanning electron microscopy

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