Facile synthesis of rGO/SmFe5O12/CoFe2O4 ternary nanocomposites: Composition control for superior broadband microwave absorption performance

• DOI: 10.1016/j.apsusc.2018.05.150
• Publication Date: 2018-05-21T18:21:52Z
• Authors: Wei Shen; Biying Ren; Sizhu Wu; Wei Wang; Xiaofeng Zhou
• Keywords: 01 natural sciences; 0104 chemical sciences

Abstract It is still a challenge to design and synthesize ferrite-based composites with strong absorption capability and broad frequency bandwidth. In this work, firstly, the binary Sm3Fe5O12/CoFe2O4 composites with different mass ratio of Sm3Fe5O12 to CoFe2O4 are synthesized by a facile hydrothermal process. Next, adding 10 mg graphite oxide (GO) into Sm3Fe5O12/CoFe2O4 solution, series of novel reduced graphene oxide (rGO)/Sm3Fe5O12/CoFe2O4 ternary nanocomposites are fabricated using a one-pot hydrothermal technique. The microstructure, morphology, chemical composition and magnetic property of as-synthesized nanocomposites are characterized by XRD, Raman, TEM, SEM, XPS and VSM. The magnetic performance of Sm3Fe5O12 changes with the addition of CoFe2O4 and rGO. The microwave absorption measurement is carried out by vector network analyzer, where the as-synthesized samples exhibit excellent and tunable microwave adsorption performance. Herein, introducing CoFe2O4 and rGO into Sm2Fe5O12 can effectively tune its dielectric and magnetic loss. Encouragingly, when the mass ratio of Sm3Fe5O12 to CoFe2O4 is 1:3, the rGO/Sm3Fe5O12/CoFe2O4 ternary nanocomposite possesses the maximum reflection loss (RL) of −73.71 dB at 14.88 GHz with a thickness of 2.09 mm. The effective bandwidth (RL