Research on Preparation and Absorbing Performance of Graphene Oxide and Reduced Graphene Oxide

In this paper, graphene oxide (GO) is successfully prepared by the Hummers' method, based on which reduced graphene oxide (rGO) is prepared by the hydrothermal reduction method. Based on the characterization of GO and rGO materials, the electromagnetic parameters of the two materials are tested by the coaxial ring method, and their electromagnetic wave absorbing performance is analyzed in detail. It is found that GO has no obvious absorbing performance, while rGO exhibits partial absorbing performance. The latter has weak absorbing performance due to its characteristics limitation but has high electromagnetic wave absorbing potential due to its excellent dielectric performance. At the same time, because of the unique two-dimensional lamellar structure and abundant active sites on the surface, rGO can be used as an excellent substrate material to prepare composite absorbing materials with excellent electromagnetic wave absorbing performance.