Preparation of MoS 2 /MXene/NC Porous Composite Microspheres with Wrinkled Surface and Their Microwave Absorption Performances

Preparation of MoS 2 /MXene/NC Porous Composite Microspheres with Wrinkled Surface and Their Microwave Absorption Performances
来源：张宝亮教授个人网站 2023-09-21

In this paper, a MoS2/MXene/N-doped carbon (NC) porous composite microsphere with a wrinkled surface was designed and constructed. Lithium fluoride exfoliation and lithium-ion etching fabricated two types of 2D assembly elements, MXene (Ti3C2Tx) and MoS2 nanosheets. The two nanosheets were self-assembled by an ultrasonic spray technique with high-temperature reduction, and MoS2/MXene microspheres with 3Dwrinkled shapes were obtained. The coating of the surface NC layer was achieved by the carbonization of a polydopamine (PDA) precursor formed by the self-polymerization of dopamine. The amount of PDA coating and raw material ratio significantly affect the microstructure and electromagnetic wave absorption performance. The optimal MXene to MoS2 mass ratio is 5:1, and the optimal coating time and filler amount are 8 h and 40%. MoS2/MXene/NC composite microspheres exhibit excellent absorption performance with low reflection losses (RLmin) of ?52.9 dB at 6.4 GHz and high adequate absorption bandwidths of 5.2 GHz. By adjusting the thickness of the absorber, the full coverage of the C–Ku band (4–18 GHz) can be achieved. As a new composite absorber, it has significant potential applications.
[来源：中国聚合物网]