Ag-decorated MoO3 microspheres gas sensor for triethylamine detection with rapid response/recovery

In this work, Ag-decorated MoO3 microspheres with regular morphology were prepared by a simple dipping method. The gas-sensing measurement results show that the optimum operating temperature of the Ag/MoO3 sensor decreased 20 ℃ compared with the pure MoO3, and the response to 20 ppm triethylamine increased 10 times. Furthermore, the Ag/MoO3 sensor manifests fast response/recovery times (4/14 s), good selectivity and reliable stability to triethylamine at 220 ℃. The improved triethylamine gas-sensing properties of Ag/MoO3 sensor is mainly due to the spillover effect and high oxygen vacancy ratio brought about by the introduction of Ag nanoparticles, which greatly speeds up the carrier migration rate. The Ag-decorated MoO3 microspheres provide a new pathway for the development and design of new triethylamine gas sensors.