Radiation-induced synthesis of graphene/ferrites nanocomposites for enhanced microwave-absorbing properties

Ferrites (Fe n O m ) nanoparticles decorated graphene nanocomposites are prepared by gamma ray irradiation technology. X-ray diffraction patterns, X-ray photoelectron spectroscopy, and transmission electron microscopy are applied to analyze the structure of the obtained products. Graphene oxide (GO) is partially reduced to graphene by gamma ray irradiation. Besides, Fe n O m nanoparticles (the size is ~ 4.9 nm), which are composed of Fe 2 O 3 and Fe 3 O 4 , are evenly decorated on graphene nanosheets. Due to the introduction of magnetic ferrite nanoparticles, the obtained nanocomposite shows an optimal reflection loss (RL) of − 42.7 dB at 17.0 GHz. Besides, the effective absorption bandwidth (RL ≤ − 10 dB) is 5.7 GHz (12.3–18 GHz).