Abstract
This paper reports the performance of the humidity sensing properties of cobalt zincate nanocomposite synthesized via conventional precipitation method. X-ray diffraction (XRD) outline revealed amorphous nature of nanocomposite. Scanning Electron Microscopy (SEM) images show sphere-shaped morphology all over the surface. Optical characterization of the film was carried out by Ultra Violet (UV)-visible spectrophotometer. By Tauc plot the estimated value of band gap of the film was found 3.81 eV. The variations in electrical resistance of the pellet and films were measured with change in Relative Humidity (RH%). As RH% increases, the resistance of each pellet decreases for the range 10% to 95%. The activation energy calculated from Arrhenius plot was found 0.58 eV. This investigation demonstrates the potential of ZnxCo2−xO4 nanocomposite for x < 1 based sensor for humidity sensing which is unique.
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