Thick films of tungsten trioxide (WO3), tin dioxide (SnO2), and tungsten-tin (W-Sn) mixed oxides at different nominal Sn molar fraction (0.1 and 0.3) were prepared. The functional materials were synthesized and characterized by SEM, X-ray diffraction, specific surface area measurements (BET), UV-Vis-NIR and IR spectroscopies. The gas sensing measurements highlighted that the mixed oxides based sensors offer a better response towards NO2 with respect to pure WO3 being almost insensitive to CO.
W-Sn Mixed Oxides: New Materials for Gas Sensing
Morandi S.;Amodio A.;
2020-01-01
Abstract
Thick films of tungsten trioxide (WO3), tin dioxide (SnO2), and tungsten-tin (W-Sn) mixed oxides at different nominal Sn molar fraction (0.1 and 0.3) were prepared. The functional materials were synthesized and characterized by SEM, X-ray diffraction, specific surface area measurements (BET), UV-Vis-NIR and IR spectroscopies. The gas sensing measurements highlighted that the mixed oxides based sensors offer a better response towards NO2 with respect to pure WO3 being almost insensitive to CO.
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