Solvothermal synthesis of flower-like CoS hollow microspheres with excellent microwave absorption properties

摘要: In this study, flower-like CoS hollow spheres (CHSs), synthesized via a facile solvothermal method in the presence of CTAB, were initially investigated as microwave absorbers. It was found that such microstructure significantly different from nanoparticles (CoS NPs) prepared without introducing CTAB under similar preparation conditions. Moreover, with low filler loading 20 wt%, CHSs based composite could reach an optimal reflection loss −43.6 dB at 15.6 GHz, and exhibit effective absorption bandwidth (below −10 dB) 4.6 GHz (13.2–17.8 GHz) thin thickness 2.0 mm. Furthermore, through adjusting to 5.0 mm, 13.2 be monitored frequency range 4.8–18.0 GHz. The results indicate novel are intriguing absorbers advantages strong absorption, broad bandwidth, light weight thickness, which is attributed unique nanoarchitecture, extra void space, high dielectric loss.