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/Ti3C2Tx MXene composites prepared by loading CuS nanoparticles onto 2D Ti3C2Tx via a solvothermal method. The morphology and electromagnetic absorption properties of this composite were investigated and the results demonstrated that the CuS/Ti3C2Tx composite 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/Ti3C2Tx MXene composites offer an efficient foundation for the design and utilization of other lightweight microwave absorbers.

中文翻译：

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合成具有增强微波吸收性能的 CuS 纳米粒子装饰的 Ti3C2Tx MXene

摘要 MXene 是一种新型的二维 (2D) 多层材料，作为用于电磁能量衰减的微波吸收剂引起了人们非同寻常的兴趣。通过优化结构合成基于 MXene 的异质结构复合材料是赋予 MXene 材料高性能微波吸收的有效策略。本研究报告了通过溶剂热法将 CuS 纳米颗粒加载到二维 Ti3C2Tx 上制备的三明治状 CuS/Ti3C2Tx MXene 复合材料的微波吸收性能的制备和研究。研究了该复合材料的形貌和电磁吸收特性，结果表明具有异质层结构的 CuS/Ti3C2Tx 复合材料显示出优异的微波吸收能力。在石蜡基质中填充 35 wt% 的填料时，在7.3 GHz的频率下，最小反射损耗值达到-45.3 dB，有效吸收带宽达到5.2 GHz，厚度为2.0 mm。增强的微波吸收性能可归因于导电网络、界面极化、偶极极化、多次反射和散射的协同作用。因此，合成的 CuS/Ti3C2Tx MXene 复合材料为其他轻质微波吸收剂的设计和利用提供了有效的基础。多次反射和散射。因此，合成的 CuS/Ti3C2Tx MXene 复合材料为其他轻质微波吸收剂的设计和利用提供了有效的基础。多次反射和散射。因此，合成的 CuS/Ti3C2Tx MXene 复合材料为其他轻质微波吸收剂的设计和利用提供了有效的基础。