Room Temperature Sensing Properties of In2O3-MXene Composites to NO2

With the rapid development of technology, nanocomposite materials are playing an increasingly crucial role in gas-sensing applications. This study focuses on the effective fabrication of In2O3 nanofibers through the electrospinning method. The In2O3 was uniformly dispersed in a preconfigured MXene ethanol solution using ethanol dispersal sample preparation, and the In2O3-MXene composite was successfully produced through ultrasonic drying. The study evaluated the sensitivity of In2O3-MXene composite nanomaterials in detecting NO2 at room temperature. The sensor performance of the MXene composite nanomaterials toward nitrogen dioxide exceeded that of pure In2O3. The sample exhibited a response of up to 3800 for NO2 at 10 ppm, with a detection limit of 50 ppb, showcasing its capability in detecting low NO2 concentrations. Further analysis of the gas-sensitive mechanism revealed that the strong specificity of the composite nanomaterials may stem from the formation of more favorable gas attachment sites on the material surface. The present study provides a greater value for the detection of nitrogen dioxide at low concentrations at room temperature.