| Abstract: | MXene,a novel two-dimensional (2D) multi-layer material,has drawn unusual interest as the microwave absorbers for electromagnetic energy attenuation.Synthetic MXene-based heterostructure composites via optimizing structure is an effective strategy to endow MXene materials with high-performance microwave absorption.This study reports the fabrication and investigation of the microwave absorption performance of a sandwich-like CuS/Ti_3C_2T_xMXene composites prepared by loading CuS nanoparticles onto 2D Ti_3C_2T_xvia a solvothermal method.The morphology and electromagnetic absorption properties of this composite were investigated and the results demonstrated that the CuS/Ti_3C_2T_xcomposite with a heterolayered architecture displayed superior microwave absorption ability.With a 35 wt%filler loading in the paraffin matrix,the minimum reflection loss value reached-45.3 dB at a frequency of 7.3 GHz and the effective absorption bandwidth achieved a value as high as 5.2 GHz with a thickness of 2.0 mm.The enhanced microwave absorption performances can be ascribed to the cooperation of the conductive network,interface polarization,dipole polarization,multiple reflection and scattering.Therefore,the synthesized CuS/Ti_3C_2T_xMXene composites offer an efficient foundation for the design and utilization of other lightweight microwave absorbers. |
