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- W2946109828 abstract "Abstract We report on the propanol vapour (C3H8O) gas sensing characteristics of ZnO nanostructures prepared via hydrothermal assisted method. The ZnO-4h sensor showed a high response (i.e. resistance ratio), sensitivity and selectivity toward C3H8O gas at low operating temperature of 125 °C. A response and recovery times of approximately 190 and 200 s were recorded. The response of ZnO-4h based sensor to 40 ppm C3H8O was approximately 2 times higher than that of other sensing materials in dry air, while in the presence of 40% RH the response was 5 times higher. The exceptional C3H8O-sensing performance of ZnO-4h is related to more C3H8O adsorption sites provided by VO. The ZnO-04h based sensor showed a clear repeatability towards 40 ppm C3H8O for four successive cycles in the presence of various RH of 40 and 60% at 125 °C. The sensor response improved in the presence of RH humidity showing that the water vapour was not competing with the C3H8O for the pre-adsorbed oxygen ions, thus its interfering effect in the C3H8O sensing was considerably minimized. The ZnO-4h based sensor was further tested for long-term stability and the sensor was very stable after 45 days. The fundamental sensing mechanism towards C3H8O vapour is also discussed." @default.
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- W2946109828 date "2019-09-01" @default.
- W2946109828 modified "2023-10-15" @default.
- W2946109828 title "Selective detection of propanol vapour at low operating temperature utilizing ZnO nanostructures" @default.
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- W2946109828 doi "https://doi.org/10.1016/j.ceramint.2019.05.172" @default.
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