VTe2 nanospheres for NO2 gas sensors

Nitrogen dioxide is a toxic gas to the human body, which is the cause of acid rain and respiratory diseases. In this study, VTe 2 was first created for use in gas sensors by hydrothermal synthesis. After examining the gas-sensitive characteristics, it was found that the VTe 2 gas sensor responds 105 % to 50 ppm nitrogen dioxide (NO 2 ) gas at 140°C and 40 % relative humidity (RH), with a relative humidity setting temperature of 25°C. Furthermore, the sensor has fast response recovery time, good selectivity, repeatability, stability and moisture resistance. Finally, a sensing mechanism for NO 2 detection was suggested.