Structure and electromagnetic properties of Ti₃C₂T_x MXene derived from Ti₃AlC₂ with different microstructures

As the precursor of MXenes, the microstructure of MAX phases would directly influence the structures and electromagnetic (EM) absorbing properties of MXenes. To reveal this effect, five kinds of Ti₃AlC₂ powders with different microstructures and compositions were chosen, and then were etched by HF solution to prepare Ti₃C₂T_x. The results showed that the larger flake area and less impurity content in Ti₃AlC₂ powder can lead to better EM absorption ability of as-derived Ti₃C₂T_x. This study provides a new way to regulate the EM absorbing performance of MXene by tailoring the structures of MAX phases.