Low concentration CO gas sensor constructed from MoS2 nanosheets dispersed SnO2 nanoparticles at room temperature under UV light

In consideration of the different electron structure-associated physical properties and internal sensing merits of MoS2 and SnO2, this work reports a nanocomposite with unique structure of MoS2 nanosheets dispersed SnO2 nanoparticles. The sensing performance of MoS2/SnO2 sensor toward low concentration CO was investigated at room temperature under the UV light illumination. It was found that MoS2/SnO2 sensor shows improved CO gas response (R - 4.97 at 40 ppm CO) compared with pure SnO2 (R - 3.27 at 40 ppm CO), which is due to the unique structure and the formation of heterostructure between MoS2 and SnO2. Moreover, the fabricated sensor also exhibits fast response and recovery time (43 s/36 s). The sensor provides a potential platform for monitoring CO gas at room temperature.

Automated summary

This study reports a nanocomposite with a unique structure of MoS2 nanosheets dispersed SnO2 nanoparticles. The sensing performance of a MoS2/SnO2 sensor towards low concentration CO was investigated under UV light illumination. It was found that the MoS2/SnO2 sensor exhibits improved CO gas response compared to pure SnO2, which is attributed to the formation of a heterostructure between MoS2 and SnO2. Additionally, the sensor also demonstrates fast response and recovery time. It provides a potential platform for monitoring CO gas at room temperature.