Chemically synthesized ZnO and Cd-ZnO thick films as Ethanol sensor

Abstract

In this paper, we report precipitation method for preparation of pure and Cd-ZnO nanorod using different doing concentration. Thick films are fabricated by screen printing technique. For structural, morphological, compositional and optical characteristics of fabricated thick films X-ray diffraction technique (XRD), field-emission scanning electron microscopy (FESEM), energy dispersive X-ray technique and UV–visible spectroscopy were used. To check gas sensing properties, hydrogen sulphide (H2S), carbon dioxide (CO2), liquid petroleum gas (LPG), ammonia vapour (NH3), ethanol vapour and hydrogen (H2) gases were used. The excellent gas response was obtained for 3.0 wt.% Cd-ZnO towards ethanol among all Cd-ZnO thick films at operating temperature 573 °K.