Present paper reports synthesis of zinc oxide and its application as liquefied petroleum gas sen sor. The structural and morphological characterizations of the sample were analyzed by X -ray diffraction (XRD) and Scanning electron microscopy (SEM). The average value of crystallite size of ZnO calculated from Scherrer's formula is found to be 50 nm. SEM images exhibit the porous nature of sensing material with a number of active sites. The LPG sensing properties of the zinc oxide were investigated at room temperature for different vol.% of LPG. The variations in electrical resistance were measured with the exposure of LPG as a function of time. The maximum value of sensitivity was found to be 12.3 for 4 vol. % of LPG. These experimental results show that nanostructured zinc oxide is a promising material for LPG sensor.
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