Solvothermally Synthesized Co(CoO)/Ti₃C₂Tx/TiO₂ Nanocomposites for Enhanced Microwave Absorption

Ti3C2Tx MXene has already been studied as an appealing microwave absorption material, benefiting from its fascinating laminated structure. Nevertheless, the single absorption mechanism of pure Ti3C2Tx MXene results in poor impedance matching. In this paper, magnetic Co nanoparticles were introduced on Ti3C2Tx MXene by using a simple solvothermal method. By introducing different contents of Co nanoparticles, the impedance matching and magnetic properties of the Co(CoO)/Ti3C2Tx/TiO2 nanocomposites could be optimized. It is demonstrated that the effective absorption bandwidth of Co(CoO)/Ti3C2Tx/TiO2 nanocomposites is 5.84 GHz (6.88–12.72 GHz), while the minimum reflection loss is −61.02 dB. Comparatively, our Co(CoO)/Ti3C2Tx/TiO2 nanocomposites exhibited better satisfied microwave absorption performance. The potential mechanism of microwave absorption was fully explored. Our report provides a simple and safe method to design high-efficiency absorbers which rely on Ti3C2Tx.