2D-layered Ti₃C₂/TiO₂ hybrids derived from Ti₃C₂ MXenes for enhanced electromagnetic wave absorption

In this work, 2D-layered Ti₃C₂/TiO₂ hybrids derived from Ti₃C₂ MXenes were calcined at different temperature for 2 h with a ramping rate of 5 ^°C/min to adjust the electromagnetic wave absorption performance, and the static dielectric properties of the Ti₃C₂ and anatase TiO₂ were studied by density functional theory calculations to illustrate the contribution to dielectric loss of TiO₂ and Ti₃C₂ MXenes. The 2D-layered Ti₃C₂/TiO₂ Hybrids exhibit a minimum reflection loss of −40.07 dB at 19.2 GHz with a relative thin thickness of 1.1 mm, and the effective bandwidth with reflection loss less than −10 dB reaches more than 3.6 GHz. The calculated results display higher ε^' and ε^'' of Ti₃C₂ MXenes than that of anatase TiO₂ in the measured range of frequency, which is in accordance with the experiments. The 2D-layered Ti₃C₂/TiO₂ hybrids are expected to exhibit the enhanced electromagnetic wave absorption performance thanks to the appropriate complex permittivity, matching impendence and high dielectric loss.