Abstract
Hollow ZnSnO 3 microspheres were successfully prepared by hydrothermal method at 160 °C for 12 h. The prepared material was characterized by field emission scanning electron microscope (FESEM), transmission electron microscope (TEM) and X-ray diffraction measurements (XRD). The average diameter of the hollow ZnSnO 3 microspheres was in the range of 400–600 nm. Compared with solid ZnSnO 3 microspheres structure, the hollow ZnSnO 3 microspheres showed better response ( S) to butane. To 500 ppm butane, the sensor response ( S) of the hollow ZnSnO 3 microspheres was 5.79 at the optimum operating temperature of 380 °C, and the response and recovery time were 0.3 s and 0.65 s, respectively. The sensitivities of sensors based on this material were linear with the concentration of butane in the range of 100–1000 ppm.
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