Ultra-sensitive Ag-LaFeO3 for selective detection of ethanol

Ag-LaFeO3 was prepared by chemical reduction method with NaBH4 ethanol solution. It can be seen from X-ray diffraction (XRD) that all samples are still perovskite structure. Two distinct Ag peaks were observed in X-ray photoelectron spectroscopy (XPS). The experimental results show that at 190 °C, the gas response of Ag-LaFeO3 sensor to 100 ppm ethanol is 155, which is much higher than that of LaFeO3 sensor. Meanwhile, the response time and...