Abstract
Spherical ZnO nanostructures doped with Sn nanoparticles (2 %, 5%, 7 %, and 10 %) were created using the hydrothermal technique. Characterizations included XRD, FTIR, XPS, HR-TEM, FESEM, SAED, EDS, BET and UV–Visible. Maximum gas response was achieved by optimising doping concentration. When ZnO and Sn doped ZnO nanostructures were examined at various temperatures (room temperature, 100, 150, 200, and 250 °C), it was discovered that 150 °C provided the best gas response. Using several saturated solutions, the gas sensing study was conducted at various humidity rates (11, 32, 51, 63, and 84 %). In comparison to the undoped and doped sensors (2, 7 and 10 %), the 5 % Sn doped ZnO sensor has the highest response (75 %). Compared to other gases, acetone gas exhibits improved selectivity towards Sn doped ZnO sensors. Response and recovery times for 5 % Sn doped ZnO are 30.19 and 63.54 s, respectively, and repeatability was examined for roughly 60 days.
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