Available on-demand - S.NM10.05.04
Investigating Chemical Reactivity of MXenes Using Gas Chromatography
Shuohan Huang1,Gabriel Hulliung1,Vadym Mochalin1
Missouri University of Science and Technology1
MXenes are a new family of two-dimensional (2D) materials discovered in 2011. Because of their 2D structure and many outstanding properties , MXenes have raised significant interest for various applications, such as batteries, optoelectronic devices , supercapacitors, lasers [3,4], sensors , etc. It was found that titanium carbide MXene flakes in aqueous solutions spontaneously transform into TiO2 and recently, it has been demonstrated that water plays the main role in the reactions leading to this chemical transformation . Thus, studying MXene reactivity is important for prolonged shelf life of MXene colloidal solutions, as well as for robust performance of MXene based devices. In this work, we demonstrate the use of gas chromatography technique to study reactivity of MXenes. Several hypotheses have been put forward to explain the degradation of MXenes in aqueous environments. However, no studies of the gaseous products of this reaction have been reported. The analysis of gases produced during MXene degradation, using gas chromatography, allows for a better understanding of the degradation process. The chemical reactivity of MXenes with different monolayer thickness was also investigated at different pH and temperatures. Our results have led to new, important conclusions about the chemical reactivity of MXenes in aqueous solutions. This knowledge will have significant impacts on the development of MXenes and other 2D materials for many applications.
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