Chemosensory Properties of Nanocomposite Ti_0.2V_1.8CT_x–V₂O₅–SnO₂

The method of modification of accordion-like complex Ti_0.2V_1.8CT_x 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 Ti_0.2V_1.8CT_x-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 Ti_0.2V_1.8CT_x–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.