Preparation and microwave absorption properties of asphalt carbon coated reduced graphene oxide/magnetic CoFe2O4 hollow particles modified multi-wall carbon nanotube composites

Design lightweight hybrid structured, magnetic CoFe2O4 hollow particles modified multi-wall carbon nanotubes (MWCNTs) with reduced graphene oxide (RGO) sheets to improve microwave shielding. Carbon coated reduced graphene oxide/magnetic CoFe2O4 hollow particles modified multi-wall carbon nanotube composites were prepared, which exhibited significant microwave absorption performance. As an absorber, the composites with a filler loading of 20 wt% exhibited significant microwave absorption properties due to the special nanostructure, the extra void space, the high surface area and the synergistic effect. The maximum reflection loss reaches −46.8 dB with a thickness of 1.6 mm at 11.6 GHz. The bandwidth corresponding to the reflection loss below −10 dB is 13.1 GHz (4.9–18 GHz) with thickness in the range of 1.2 mm–4 mm. •Design lightweight 1D–2D magnetic modified composites to improve microwave absorption.•Asphalt carbon coating RGO/magnetic hollow CoFe2O4 modified MWCNTs were prepared.•The nanocomposites exhibited excellent microwave absorption properties.•The maximum reflection loss is −46.8 dB at 11.6 GHz with a thickness of 1.6 mm.