Boosting of electromagnetic wave absorption properties by multiple reinforcement mechanisms of metals in FeNi3/MoS2@NSAPC composites

•The FeNi3/MoS2@NSAPC has been successfully prepared by hydrothermal and high-temperature treatment.•FeNi3 and MoS2 construct a bimetallic mechanism to introduce magnetic loss and enhance dielectric loss for FeNi3/MoS2@NSAPC composites, effectively improving their absorption bandwidth and reflection loss.•The RLmin of FeNi3/MoS2@NSAPC-1 in 1.4 mm thickness is −60.66 dB, EAB is 5.19 GHz. The prominence of electromagnetic wave pollution problems in military construction and people development has promoted extensive research on electromagnetic wave-absorbing materials. In this paper, a multi-metal-loaded N, S co-doped carbon-based composite wave-absorbing material has been prepared and converted into FeNi3/MoS2@NSAPC through heat treatment on this basis. FeNi3 and MoS2 construct a multiple loss mechanism to enhance the N, S double-doped carbon-based wave-absorbing material, which demonstrates by the effective absorption. The EAB of FeNi3/MoS2@NSAPC is broadened, and the RLmin is improved. The results show that a RLmin = -60.66 dB obtains at a sample thickness of 1.4 mm, an absorber doping of 15 wt%, and an EAB of 5.19 GHz. This work explains the enhancement effect of metal in the “metal/heteroatom/carbon” composite system. It provides a basis for the study of Ni- or Mo-doped carbon-based wave-absorbing materials.