Lower-like ZnO was obtained through a hydrothermal process using zinc sulfate as raw material. The microstructure and morphology were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). XRD Results showed that the as-obtained sample could be indexed to hexagonal wurtzite ZnO. TEM results revealed that the ZnO sample took on flower-like shape. The gas sensors were prepared with the traditional sintering process and their gas sensitivities were detected. The gas sensitivity results showed that the sensors based on flower-like ZnO were very sensitive to dilute 90* gasoline. The relatively high sensitivity and selectivity of these sensors made from flower-like ZnO demonstrated the potential for developing a new class of selective gasoline sensors.
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