Abstract
High-performance ethanol gas sensors are in high demand for various clinical and environmental monitoring applications. In this study, we developed a high-performance ethanol gas sensor using pure SnO2 nanoflakes. These nanoflakes were synthesized through a hydrothermal method and subsequently annealed at different temperatures to investigate the impact of annealing temperature on sensor performance. Among the samples tested, the ethanol gas sensor based on SnO2 annealed at 300 °C exhibited a higher response to ethanol than other samples toward 20 and 1000 ppm ethanol gas at 200 °C. The fast response and good selectivity confirm that the SnO2 nanoflakes annealed at 300 °C can be a promising sensing material for the fabrication of ethanol gas sensors.
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