Tailoring nanoparticles composites derived from metal-organic framework as electromagnetic wave absorber

Abstract In order to solve the electromagnetic pollution, in this paper, Nickel-cobalt-based spinel materials NiCo2S4@C/Porous Carbon (PC) composite material, composed of metal sulfide spinel, porous carbon composite material, was prepared. Thanks to the designable interface and the added dipoles, the microwave dielectric responsiveness can be significantly improved, leading to enhanced microwave absorption performance. The results show that, with a matching thickness of 2.1 mm, the minimum reflection loss (RLmin) reaches −59.36 dB at 15.28 GHz. Meanwhile, the effective absorption band (EAB) covers 6.8 GHz, indicating ideal broadband characteristics. In our case, the manufacture of multi-component EM absorbers using a new method can become a promising candidate for high-performance EM absorbers.