Chemiresistive SnS₂/Nb₄C₃T_x gas sensor for detection triethylamine at room temperature

High conductivity, large surface area and plentiful functional groups of transition metal carbides/nitrides (MXene) have made MXene and composites a hot topic for researching room temperature Volatile Organic Compounds (VOCs) sensors. Recently, we have successfully prepared SnS2/Nb4C3Tx composites by in -situ growth of SnS2 nanosheets on Nb4C3Tx. The gas -sensing material exhibited excellent selectivity, sensitivity and stability for triethylamine (TEA) at room temperature. The SnS2/Nb4C3Tx composite has a high response of 1046.6% to 50 ppm TEA with a response time of 11 s and a recovery time of 158 s. The high responsiveness is primarily attributed to the active center provided by SnS2, which enhances the gas adsorption and diffusion surface area while binding with Nb4C3Tx. This work achieves a practical selection and response of room temperature TEA, which provides a new idea for designing ideal VOC sensors at room temperature.