Magnetic FeCo nanoparticles-decorated Ti3C2 MXene with enhanced microwave absorption performance

•Magnetic FeCo-decorated Ti3C2 MXene were successfully prepared.•Reduced complex permittivity and additional magnetic loss can be observed in the FeCo-Ti3C2 MXene composite.•A broad effective bandwidth of 8.8 GHz was achieved in the FeCo-Ti3C2 MXene composite with the thickness of only 1.6 mm. Ti3C2 MXene is highly desirable as a potential microwave absorbent due to its positive dielectric loss ability. However, lack of magnetic loss for pure Ti3C2 MXene results in unbalanced electromagnetic parameters and poor impedance matching. In this paper, the laminated Ti3C2 MXene was synthesized using HF etching process. Then, the magnetic FeCo-decorated Ti3C2 MXene (FeCo-Ti3C2 MXene) composite was fabricated for the first time via a in-situ hydrothermal method. The incorporation of magnetic FeCo nanoparticles on Ti3C2 MXene can enhance microwave absorption property. Specifically, the FeCo-Ti3C2 MXene composite displayed a broad effective bandwidth (RL