Herein, nitrogen-doped reduced graphene oxide/zinc ferrite (NRGO/ZnFe2O4) hybrid nanocomposites were synthesized through a facile one-pot hydrothermal strategy by using graphene oxide (GO) as a substrate. Results demonstrated that the additive amounts of GO had remarkable influence on the micromorphology and microwave absorption properties of NRGO/ZnFe2O4 hybrid nanocomposites. The asprepared hybrid nanocomposites showed good dispersion of nanoparticles as the additive amounts of GO increasing and numerous ZnFe2O4 nanoparticles uniformly loaded on the crumpled surface of thinly flake-like NRGO were observed. It was found that the obtained hybrid nanocomposites exhibited obviously enhanced microwave absorption performance than that of pure ZnFe2O4. Remarkably, the minimum reflection loss reached
54.6 dB at 10.0 GHz (X-band) and effective absorption bandwidth achieved 4.2 GHz (11.8–16.0 GHz) with a thickness of merely 2.0 mm and filler loading of 40 wt%. It was believed that our results could be helpful for designing and fabricating graphene-based composites as high-efficient microwave absorbers.