|About this Abstract
||Materials Science & Technology 2019
||Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
||Oxidation and Stabilization of 2D MXene Nanosheets
||Xiaofei Zhao, Touseef Habib, Evan Prehn, Aniruddh Vashisth, Smit Shah, Yexiao Chen, Zeyi Tan, Jodie Lutkenhaus, Miladin Radovic, Micah Green
|On-Site Speaker (Planned)
Practical uses of MXenes, such as Ti3C2Tx, remains challenging as these nanosheets are known to oxidize and degrade quickly from reacting with water and dissolved oxygen. Here, we examine oxidation of MXene nanosheets in various media (air, liquid, and solid) via multiple types of measurements to assess their shelf stability. The oxidation rate of MXene nanosheets were observed fastest in liquid media and slowest in solid media and can be accelerated by exposure to UV light. We also demonstrate an effective method to retard the oxidation of colloidal Ti3C2Tx MXene nanosheets by introducing antioxidants such as sodium L-ascorbate. The success of the method is evident in the conductivity and colloidal stability of Ti3C2Tx. Even in the presence of water and oxygen, the electrical conductivity of Ti3C2Tx nanosheets treated with sodium L-ascorbate was orders of magnitude higher as compared to untreated ones after 21 days.
||Definite: At-meeting proceedings