Study of NO2 Gas Sensor Based on Ce-doped WO3 Prepared by Electrostatic Spinning Method
To improve the gas-sensing performance of WO3 for NO2,Ce-doped WO3 nanofibers were prepared by electrostatic spinning technique,and WO3 and Ce-WO3 gas sensors with different doping ratios were prepared for gas-sensing experiments. The experimental results showed that the doping of Ce elements significantly improved the sensing performance of WO3 for NO2. When the operating temperature was reduced to 100℃,the response value of the 2 mol％ Ce-WO3 sensor was 22.16 with the concentration of NO2 of 5 ppm. The structure,morphology,and surface chemical states were characterized by XRD,SEM,and XPS,and the bandgap was characterized and analyzed using UV-vis. The analysis showed that the enhancement of the NO2 performance of the 2 mol％ Ce-WO3 sensor was mainly due to the increase of the adsorbed oxygen content on the surface and the reduction of the bandgap after Ce doping.
gas sensorelectrostatic spinningNO2 detectionCe-doped WO3
万方数据
