Broadband electromagnetic absorption of Ti 3 C 2 T x MXene/WS 2 composite via constructing two‐dimensional heterostructure

Ti 3 C 2 T x MXene, an emerging two‐dimensional (2D) ceramic material, has rich interfaces and strong conductive networks. Herein, we have successfully built a heterostructure between Ti 3 C 2 T x MXene and WS 2 to improve electromagnetic absorption performance. X‐ray diffraction and X‐ray photoelectron spectroscopy were used to determine the successful synthesis of Ti 3 C 2 T x /WS 2 composite. Field emission scanning electron microscopy and transmission electron microscopy images show that WS 2 nanosheets are evenly dispersed on the accordion‐like Ti 3 C 2 T x MXene. Importantly, Ti 3 C 2 T x MXene/WS 2 composite has sufficiently high dielectric loss and impedance matching due to self‐adjusting conductivity and 2D heterostructure interfaces. As a result, the Ti 3 C 2 T x /WS 2 composite has a minimum reflection loss (RL min ) of −61.06 dB at 13.28 GHz. Besides, it has a broad effective absorption bandwidth (EAB) of 6.5 GHz, with EAB >5.0 GHz covering a wide range of thickness. Such impressive results may provide experience for the application of Ti 3 C 2 T x ceramics and 2D materials.