Effects of CdO dopant on the gas sensitivity properties of ZnFe2O4 semiconductors

This paper reports the preparation and gas sensitivity properties of Zn1−xCdxFe2O4 to C2H2OH. Raw powders of Zn1−xCdxFe2O4 were obtained by a chemical co-precipitation and solid-state reaction method. The effects of the calcining temperature on the phase constituents are characterized by X-ray diffraction (XRD). We investigated the influence of CdO on the conductance–temperature correlation, and gas sensing properties of ZnFe2O4. The results demonstrated that CdO could improve the sensitivity, selectivity and response time of ZnFe2O4.