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 In 2 O 3 nanofibers through the electrospinning method. The In 2 O 3 was uniformly dispersed in a preconfigured MXene ethanol solution using ethanol dispersal sample preparation, and the In 2 O 3 -MXene composite was successfully produced through ultrasonic drying. The study evaluated the sensitivity of In 2 O 3 -MXene composite nanomaterials in detecting NO 2 at room temperature. The sensor performance of the MXene composite nanomaterials toward nitrogen dioxide exceeded that of pure In 2 O 3 . The sample exhibited a response of up to 3800 for NO 2 at 10 ppm, with a detection limit of 50 ppb, showcasing its capability in detecting low NO 2 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.