Toluene and Acetone Detection on Sensors Based on YSZ Electrolyte and Semiconducting Metal Oxide Nanoparticles

摘要

In this study potentiometric sensors based on yttria stabilized zirconia (YSZ) with semiconducting metal oxides (SMO) as sensing electrode materials in Pt/YSZ/(Pt+SMO) structure, were fabricated and applied to detect 100-1000 ppm acetone and toluene in the temperature ranges of 350-500°C. 1.0 wt% Pt/SnO_2, 1.0 wt% Pt/(4.95 wt% CeO_2+ 94.05 wt% SnO_2) once with the same thickness and once with different thickness are used as sensing materials and denoted as sensors I, II and III respectively. The results reveal that the sensors' response to toluene with CeO_2-dopants, are improved, whereas those for acetone are suppressed particularly at lower temperatures and concentrations. It is also shown that by increasing the thickness, the response to acetone and toluene increased. However, the extent of improvement was more pronounced for acetone.