Self-Assembled Co Nanosheet/Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> Composites with Tunable Electromagnetic Wave Absorption
Zhenying Liu, Chongmei Wu, Kai Wang, Yan Wang, Guiyang Xian, Zhaolin Zhu, Yin Liu, Ling Bing Kong
Abstract
Two-dimensional layered Ti 3 C 2 T x is a great potential candidate as an electromagnetic wave (EMW) absorber due to its large specific surface area and abundant functional groups and defects. However, the impedance mismatch caused by the high conductivity and the lack of magnetic loss seriously has limited the application of Ti 3 C 2 T x in EMW absorption. Therefore, Co/Ti 3 C 2 T x composites were prepared by combining Ti 3 C 2 T x with magnetic Co nanosheets through electrostatic self-assembly. It is found that desired EMW absorption performance could be obtained by optimizing the content of Co nanosheet. Specifically, the optimized sample exhibited a minimum reflection loss (RL min ) value of −47.09 dB and an effective absorption bandwidth of 2.76 GHz as the thickness was 3.67 mm. In addition, possible mechanisms of EMW absorption were elucidated in detail. Our results provide a simple and environmentally friendly method for the design of EMW absorbers based on Ti 3 C 2 T x .