Oxidation stability of Ti3C2Tx MXene nanosheets in solvents and composite films

Abstract

Ti 3 C 2 T x belongs to the family of MXenes, 2D materials with an attractive combination of functional properties suitable for applications such as batteries, supercapacitors, and strain sensors. However, the fabrication of devices and functional coatings based on Ti 3 C 2 T x remains challenging as they are prone to chemical degradation by their oxidation to TiO 2. In this paper, we examine the oxidation of Ti 3 C 2 T x in air, liquid, and solid media via conductivity measurements to assess the shelf life of Ti 3 C 2 T x MXenes. The oxidation of Ti 3 C 2 T x was observed in all the media used in this study, but it is fastest in liquid media and slowest in solid media (including polymer matrices). We also show that the conventional indicators of MXene oxidation, such as changes in color and colloidal stability, are not always reliable. Finally, we demonstrate the acceleration of oxidation under exposure to UV light.

Near-infrared light-responsive hydrogels via peroxide-decorated MXene-initiated polymerization

“…S5, † an O-Ti/TiO 2 peak becomes dominant in inactive p-Ti 3 C 2 T x , suggesting a conversion to TiO 2 . 54 Thus, we deduce that the surface decoration of peroxide O-O in the p- Ti 3 C 2 T x nanosheets is ascribed to the generation of reactive radical species.…”

Nanohybrids of a MXene and transition metal dichalcogenide for selective detection of volatile organic compounds

“…Environmental and mechanical stability of Ti 3 C 2 T x -based sensors. A serious challenge for Ti 3 C 2 T x nanosheets being used as functional coatings or truly useful device materials is their high susceptibility to environmental degradation under humid atmosphere or in aqueous solution 33,48,49 . We hypothesize that hybridization with WSe 2 could help overcome this challenge.…”

MXene‐Based Anodes for Metal‐Ion Batteries

“…were able to combine the good rate performance and cycling stability of MXenes with the low delithiation potentials of TiO 2 and Nb 2 O 5 in TiO 2 @Ti 3 C 2 T x , Nb 2 O 5 @Nb 2 CT x and Nb 2 O 5 @Nb 4 C 3 T x composites . Partially oxidising MXenes demonstrates a facile approach to electrode fabrication, and recent developments in our understanding of MXene oxidation (often considered a drawback of MXenes in application) readily prepare the scientific community to explore and optimise these routes further.…”