The Role of Antioxidant Structure in Mitigating Oxidation in Ti3C2Tx and Ti2CTx MXenes Academic Article uri icon

abstract

  • AbstractThe oxidation of 2D MXenes jeopardizes their shelf life, both in colloidal dispersions and in functional devices. Certain compounds have been shown to effectively mitigate oxidation of MXenes (such as sodium Lascorbate, ascorbic acid, and polyanions), but the nature of interaction between these antioxidants and MXene remains unknown, which impedes the future selection and design of improved protection. This work systematically examines the interactions between three classes of organic antioxidant candidates, hydroxy acids, polycarboxylic acids, and phenols with Tin+1CnTx MXenes, specifically Ti3C2Tx and Ti2CTx. Interestingly, while some antioxidants provide no protection for the MXenes, and some antioxidants even accelerate their degradation, three antioxidants (e.g., citric acid, tartaric acid, and oxalic acid) protect the MXene nanosheets exceptionally well, showing minimum MXene degradation after the 14day storage period. Analysis of the antioxidants molecular structure and efficacy suggests that chelation interactions with the transition metal atoms of the nanosheets play a key role in effective protection of MXenes from oxidation.

published proceedings

  • ADVANCED MATERIALS INTERFACES

altmetric score

  • 2.6

author list (cited authors)

  • Zhao, X., Cao, H., Coleman, B. J., Tan, Z., Echols, I. J., Pentzer, E. B., ... Green, M. J.

citation count

  • 7

complete list of authors

  • Zhao, Xiaofei||Cao, Huaixuan||Coleman, Bryan J||Tan, Zeyi||Echols, Ian J||Pentzer, Emily B||Lutkenhaus, Jodie L||Radovic, Miladin||Green, Micah J

publication date

  • July 2022

publisher