Surface Chemistry-Driven Oxidation Mechanisms in Ti₃C₂T _x MXenes.

ABSTRACT: Ti3C2T x is a leading compound within the MXenes family and can find host in widespread applications. It is synthesized by selectively etching layers from the Ti3AlC2 precursor, and this process typically introduces surface terminations, T x , such as -OH, =O, or -F. However, the aggressive chemical conditions required for its preparation, as well as exposure to air, humidity, and heat, can lead to impurity phases that potentially compromise its desirable properties. Herein, a two-step oxidation process is revealed during heat treatment, where initial oxidation occurs between layers without altering the integrity of the Ti3C2-layered structure, followed by the formation of anatase TiO2 at elevated temperatures. The process is carefully monitored using in situ Raman spectroscopy and in situ

SUBMITTER: McIntosh BJ 

PROVIDER: S-EPMC12362798 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature