High performance H2 sensor based on ZnSnO3 cubic crystallites synthesized by a hydrothermal method.

Zinc stannate (ZnSnO3) cubic crystallites have been successfully synthesized by hydrothermal reaction at 140°C. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) have been employed to characterize the crystal structure and morphology of the as-synthesized ZnSnO3. The ZnSnO3 cubic crystallites exhibited selective sensing performance towards H2 in terms of higher gas response, rapid response-recovery, repeatability and relatively lower operating temperature. This experimental result demonstrates that the synthesized ZnSnO3 cubic crystallites have noteworthy H2 sensing characteristics which make them a promising material for the fabrication of high performance H2 sensor.