P2.7.15 CO and ethanol selective sensor of La2O3-doped ZnO nanostructures synthesized by microwave assisted fast method

Abstract

In the present work, the sensitivity of La2O3/ZnO Flower like sensors to ethanol, CO and CH4 gases was examined. ZnO doped with 2, 5 and 10 wt% La2O3 were prepared by a microwave assisted method using zinc acetate and water as solvent. The samples were characterized via SEM, EDX, and XRD. Gas sensitivity of the fabricated sensor was studied for selective detection of ethanol in presence of CO and CH4 and effect of La2O3 with different concentrations as a dopant were investigated. 5 wt% La2O3 doped sample was shown to improve the sensor response to 500 ppm ethanol with high selectivity in presence of CO and CH4.