SnS2 nanoparticle-based gas sensor with highly sensitive NO2 detection at room temperature

The power consumption of the chemical resistive gas sensor should be considered when its performance is developed. One of the most effective methods for reducing the power consumption is to make the gas sensor work at room temperature. A tin disulfide (SnS2) nanoparticle-based gas sensor with high sensitivity and fast recovery is proposed in this paper for detecting the nitrogen dioxide (NO2). The experimental results show that the SnS2 nanoparticle-based gas sensor has excellent gas sensing performance at room temperature, including high sensitivity, rapid response/recovery speed (28 s/1 s), high selectivity and good repeatability and reversibility. The main reason for the excellent performance of the SnS2 nanoparticle-based gas sensor is mainly attributed to the unique physical affinity and favorable electronic band positions of the SnS2 material, which promotes the physisorption and charge transfer of NO2 gas molecules. It is expected that this work can provide guidance for the real-time rapid detection of NO2 at room temperature.