A facile dissolution-precipitation strategy for the preparation of PrGO-Ni@NC with enhanced electromagnetic wave adsorption at ultralow filler loading

Abstract

Three-dimensional hierarchical networks (3DHNs) embedded with magnetic metal nanoparticles are promising candidates for high performance electromagnetic wave absorption materials (EWAMs) due to their abundant absorption forms. Taking advantage of the dissolution-precipitation process of carbon in nickel at high temperature, the novel 3DHNs embedded with nickel particles were rapidly prepared from GO-Ni-Polyvinylpyrrolidone (PVP) system. As designed, this porous reduced graphene oxide-nickel@nitrogen-doped carbon (PrGO-Ni@NC), displays a brilliant minimum reflection loss (RLmin) of −53.9 dB at 12.1 GHz and a wide effective absorption bandwidth (EAB) of 4.6 GHz even with a low filler loading of 3 wt% with the thickness of 2.6 mm. This work provides a facile synthetic strategy for constructing complex and orderly 3DHNs with high electromagnetic wave absorption (EWA) at ultralow filler loading.