Chemoresistive Properties of V2CTx MXene and the V2CTx/V3O7 Nanocomposite Based on It

The in-situ Raman spectroscopy oxidation of the accordion-like V2CTx MXene has been studied. It was found that a nanocomposite of V2CTx/V3O7 composition was formed as a result. The elemental and phase composition, the microstructure of the synthesized V2CTx powder and MXene film as well as the V2CTx/V3O7 nanocomposite obtained at a minimum oxidation temperature of 250 degrees C were studied using a variety of physical and chemical analysis methods. It was found that the obtained V2CTx and V2CTx/V3O7 films have an increased sensitivity to ammonia and nitrogen dioxide, respectively, at room temperature and zero humidity. It was shown that the V2CTx/V3O7 composite material is characterized by an increase in the response value for a number of analytes (including humidity) by more than one order of magnitude, as well as a change in their detection mechanisms compared to the individual V2CTx MXene.

Automated summary

The in-situ Raman spectroscopy oxidation of accordion-like V2CTx MXene resulted in the formation of a nanocomposite of V2CTx/V3O7 composition. Physical and chemical analysis methods were used to study the elemental and phase composition, as well as the microstructure of the synthesized V2CTx powder and MXene film, and the V2CTx/V3O7 nanocomposite obtained at a minimum oxidation temperature of 250 degrees C. The obtained V2CTx and V2CTx/V3O7 films showed increased sensitivity to ammonia and nitrogen dioxide, respectively, at room temperature and zero humidity. The V2CTx/V3O7 composite material exhibited a higher response value for multiple analytes (including humidity) and a change in their detection mechanisms compared to the individual V2CTx MXene.