Enhanced gas sensing performance of tin dioxide-based nanoparticles for a wide range of concentrations of hydrogen gas

摘要: Nanocrystalline tin dioxide doped with antimony Sn(Sb)O2 and catalyzed by 1 wt% palladium has been synthesized a sonochemical process. On calcination at 600 °C, the as-precipitated powder produced 8–10 nm sized nanoparticles. The calcined characterized X-ray diffraction, transmission electron microscopy, specific surface area photoelectron spectroscopy was used for thick film sensor unit fabrication. percentage response of more than 78% above 200 °C wide range concentrations hydrogen gas. Most commercially available sensors are low ppm values hydrogen, whereas we were able to establish our gas from concentration below 1/10 lower explosive limit (4%) in air as high 8% volume. At 250 operating temperature, exhibited nearly 85.5% towards 0.1% (1000 ppm) 94% fabricated also better selectivity other reducing gases like methane butane. Our results demonstrated that 1% Pd loading improved response, lowered temperature allowed detection 0.1–8% even an environment relative humidity 88%.