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

•The self-assembled hydrothermal method was used to develop a microwave absorber with a binary disulfide bond heterojunction structure and a CoS2-MoS2 composite material with nano-flower morphology.•The CoS2-MoS2 nanocomposites has a minimum reflection loss of −71.56 dB, while the matching thickness is 3.62 mm.•This work provides a strategy for the synthesis of highly efficient microwave absorbers. 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 self-assembly 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.