Fe3O4 nanospheres deposited on Prussian blue analogue-derived Ni-Co/CNTs networks for electromagnetic wave absorption

In the current work, Ni-Co/CNTs networks were firstly produced by a simple annealing treatment of Ni-Co PBA, which was then used as a carbon-based carrier and successfully deposited Fe3O4 nanospheres via a classic hy-drothermal reaction process. Additionally, the electromagnetic wave absorption performances of composites could be effectively affected by adjusting the mass ratio of the Fe3O4 nanoparticles. The minimum reflection loss (RLmin) of-48.76 dB was achieved for Fe3O4@Ni-Co/CNTs-1# at 3.5 mm thickness. Meanwhile, Fe3O4@Ni-Co/ CNTs-2# exhibited a wide effective absorption band (EAB) of 5.9 GHz (12.1-18 GHz) at a 2.0 mm matching thickness, suggesting that the Fe3O4@Ni-Co/CNTs composites were a promising absorber for electromagnetic wave absorption materials. Based on the synergistic effects of dielectric and magnetic losses generated by Ni-Co/ CNTs and Fe3O4, respectively, and appropriately matched impedances, a new strategy for fabricating light-weight, thin-thickness, strong absorption, and wide-bandwidth materials was provided.