Microwave-Assisted One-Step Synthesis of FeCo/Graphene Nanocomposite for Microwave Absorption
A high-performance microwave absorber composed of FeCo and graphene was prepared by a simple and rapid microwave-assisted one-step method. In the process, the metal precursors (iron hydroxide and cobalt hydroxide) and graphene oxide derived from graphite were transformed into FeCo and graphene, respectively, in only 12 min. Moreover, the FeCo nanoparticles were firmly dispersed on the surfaces of graphene nanosheets. The composition and structure of the FeCo/graphene nanocomposite were characterized by X-ray diffraction (XRD), Raman spectroscopy (RS), and transmission electron microscopy (TEM). It was found that with the filling ratio of only 10 wt% and the thickness of 2.2 mm, the nanocomposite showed the wide effective absorption bandwidth (less than −10 dB) of 4.7 GHz with the minimum reflection loss of −12.56 dB. The results of microwave absorption show that the nanocomposite is a potential candidate for high-performance microwave absorption.