Electromagnetic Behavior of in-situ Synthesized MXene-based Ti۳C۲/TiO۲ Composites

The present work, set out with the aim of studying the effect of in-situ precipitation of TiO۲ form Ti۳C۲Tx MXene phase on the electromagnetic (EM) behavior of Ti۳C۲/TiO۲ composites. In this regard, Ti۳C۲Tx MXene phase was synthesized using HF acidic etching of Ti۳AlC۲ MAX phase and the in-situ precipitation of TiO۲ phase within Ti۳C۲ sheets was followed by controlled annealing in temperature range of ۵۰۰-۸۰۰ oC for ۲ h. The phase and structural characteristics of prepared composites were investigated using X-ray diffraction (XRD), scanning electron microscope (SEM) and differential thermal analysis. The electromagnetic behavior of samples was also analyzed using vector network analyzer (VNA). The results showed that by performing the controlled annealing process of Ti۳C۲Tx MXene phase, it is possible to in-situ formation of TiO۲ phase and form the Ti۳C۲/TiO۲ composites. The electromagnetic behavior of Ti۳C۲/TiO۲ composites is in direct relation with the percentage of TiO۲ phase deposited within Ti۳C۲ sheets during annealing process. The reflection loss (RL) changed from -۷.۹۸ to -۲۱.۲۸ dB (within frequency range of ۱-۱۸ GHz) with increasing in annealing temperature from ۵۰۰ to ۸۰۰ oC as well as increasing the size and percentage of formed TiO۲ particles.

کلیدواژه ها:

MAX ، MXene ، In-situ ، composite ، Electromagnetic