Au/La Co-Modified In2O3 Nanospheres for Highly Sensitive Ethanol Gas Detection

In this paper, the gas-sensitive properties of co-doping rare earth element La and noble metal Au in In2O3 nanospheres were investigated for ethanol detection. Through XRD SEM characterization, grain size La-In2O3 Au/La-In2O3 nanoparticles was smaller than that pure In2O3. As expected, sample has shown a higher response vapor. Compared with nanoparticles, 2 mol%Au/2 mol%La-In2O3 better ethanol-sensing properties, including sensitivity (S = 381) lower operating temperature (210 °C) 100 ppm addition, sensor presented fast time (1 s). The enhancement mechanism discussed nanoparticles. obtained experimental results would provide new road designing sensors.