Investigation of Annealing Process Effects on the Response and Stability of Sprayed Co2SnO4 Film under Ethanol Vapor

The ethanol (C2H5OH) vapor detection properties of a layer cubic spinel cobalt stannate as-prepared Co2SnO4 (denoted as CTOas), elaborated by low-cost spray pyrolysis method, were investigated before and after an annealing process. response layers under vapors different concentrations exhibited stable behavior in dry atmosphere at the optimum working temperatures. nanomaterials characterized transmission electron microscopy (TEM), scanning (SEM), X-ray diffraction (XRD), direct current measurement (DC) impedance spectroscopy techniques (AC). After process pure CTOas, n-type to p-type conductivity switch was observed attributed Co3O4 apparition structure. layer’s increased became more annealing. stability measured over period three months. DC AC investigations allowed us propose mechanism involving grain boundary regions Co2SnO4/Co3O4 composite obtained CTOann). According its receivable sensing response, could be considered promising novel sensitive for gas sensors.