Multilayer rose-like CoS2-MoS2 composites with high microwave absorption performance

Two-dimensional materials formed through self-assembly of transition metal sulfides (TMDs) have shown potential applications for microwave absorption. In this paper, a new and simple strategy was demonstrated to prepare CoS2-MoS2 sulfides binary composites, with a heterogeneous nanoflower structure, by using a selfassembly hydrothermal reaction process. PVP is used as a surfactant to modulate the interface between CoS2 and MoS2, thus enhancing interfacial polarization and creating a unique multilayer rose-like structure. Microwave absorption performance of the samples was calculated according the electromagnetic parameters measured by using the coaxial method. The samples treated under optimized conditions exhibited a reflection loss of -71.56 dB at a thickness of 3.62 mm with an effective absorption bandwidth of 2.56 GHz.

Automated summary

Two-dimensional materials formed by self-assembly of transition metal sulfides (TMDs) have potential applications for microwave absorption. This paper demonstrated a new and simple strategy for preparing CoS2-MoS2 sulfide binary composites with a heterogeneous nanoflower structure through a self-assembly hydrothermal reaction process. PVP was used as a surfactant to enhance interfacial polarization and create a unique multilayer rose-like structure. The microwave absorption performance of the samples was calculated based on the measured electromagnetic parameters using the coaxial method. The samples treated under optimized conditions showed a reflection loss of -71.56 dB at a thickness of 3.62 mm with an effective absorption bandwidth of 2.56 GHz.