Abstract
Non-crystalline zinc nickel oxide has been deposited on glass substrate using spray pyrolysis. The structural and optical properties were examined using XRD and UV–visible spectrophotometry. These films are characterized by a direct band gap and the optical band gap energy value is lying between 3.66eV and 3.79eV. The electrical conductivity was investigated at different temperatures (330–450°C) by using the impedance spectroscopy technique in a frequency range from 5Hz to 13MHz. The value of s is dependent on temperature, which tends to decrease depending on the temperature. The temperature dependence of both the AC conductivity and the parameter s is interpreted by the correlated barrier hopping (CBH) model. These films revealed a hydrophilic character. Moreover, in the presence of these samples, a photodegradation of methyl blue (MB) and effective mineralization occurred; 14mg/L of MB was degraded within 120min. Finally, elements from the Lattice Compatibility Theory were presented in order to understand partial non-crystallization of the ZnO-NiO binary structure.
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