Fabrication of folded MXene/MoS2 composite microspheres with optimal composition and their microwave absorbing properties

[Display omitted] •A new wrinkled microsphere absorber built by MXene and MoS2 is developed.•The optimum feed ratio of MXene and MoS2 is 5:1.•The minimum reflection loss exceeds −51.2 dB and effective absorption bandwidth covers 4.4 GHz.•The reasons for the exhibit excellent properties of the microspheres are further elucidated. In this work, ultrasonic spray technology is utilized for build up MXene and MoS2 nanosheets to three-dimensional MXene/MoS2 fold microspheres by one-step method. By skillfully assembling two kinds of functional two-dimensional materials, the microspheres have abundant heterogeneous interfaces and huge specific surface area. The optimum feed ratio of MXene and MoS2 is determined by comparing the absorbing properties, and the mass ratio is 5:1. With 30% filler, the material shows the best absorption performance. At 10.4 GHz, the minimal reflection loss (RLmin) reach −51.21 dB, and the thickness is merely 2.5 mm. At the thickness in 1.6 mm, the efficacious absorption bandwidth (RL