Chemosensory Properties of Nanocomposite Ti0.2V1.8CTx–V2O5–SnO2

The method of modification of accordion-like complex Ti0.2V1.8CTx MXene with tin(IV) and vanadium oxides was developed based on hydrothermal synthesis of SnO2 in water-alcoholic medium in the presence of dispersed particles of two-dimensional vanadium-titanium carbide. Coating Ti0.2V1.8CTx-10 mol % SnO2 was deposited by microplotter printing on a specialized substrate followed by heat treatment in air at 300°С for 1 h. For the formed nanocomposite layer Ti0.2V1.8CTx–V2O5–SnO2, chemosensor properties were comprehensively studied for a number of analyte gases, including 100 ppm CO, NH3, NO2, benzene, acetone, ethanol, 1000 ppm H2, methane, and 10% oxygen. High sensitivity and selectivity of the nanocomposite at operating temperatures of 150 and 200°С to nitrogen dioxide were shown, the responses to 100 ppm NO2 were found to be 281 and 873%, respectively.