Effect of Dy substitution on the Structural and Gas sensing Properties of BiFeO3

Abstract

Facile synthesis of Dy substituted BiFeO3 were employed using Glycine combustion method. X-ray diffraction (XRD) and Scanning electron microscopy (SEM) were employed to characterize the structure and morphology of the material. The effect of Dy doping on the crystalline structure, morphologies and gas sensing properties of the final products have been investigated. The gas sensing properties of Bi1-xDyx FeO3 (x = 0.00, 0.05) materials for semiconductor gas sensors are presented. For composition with x=0.05, sensor exhibited highest response (87%) towards acetone vapor at an operating temperature 250°C. The response and recovery time of the sensor for x = 0.05 were quite low (5sec and 40sec) respectively.