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

In this work, ultrasonic spray technology is utilized for build up MXene and MoS nanosheets to three-dimensional MXene/MoS 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 MoS 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 (RL) reach -51.21 dB, and the thickness is merely 2.5 mm. At the thickness in 1.6 mm, the efficacious absorption bandwidth (RL < -10 dB) reaches 4.4 GHz. The outstanding microwave absorbing properties with MXene/MoS folded microspheres is resulted in the multiple interfaces in the heterostructure and above the average conductivity of MXene. The results show that MXene/MoS folded microsphere is a prospective electromagnetic absorbing material. The construction of MXene/MoS folded microsphere provides an effective method to devise new high-performance microwave absorbing materials.