The nanocrystalline of La 1−x Sr x CrO 3 (x = 0.0, 0.1, 0.2, 0.3 & 0.4) were prepared by sol-gel method and their crystal structures & morphology were characterized by X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM). XRD patterns indicate that the average particle size of the nanocrystalline La 0.7 Sr 0.3 CrO 3 in the range of 30 -35 nm. The gas sensing properties were studied towards reducing gases like Ammonia gas (NH 3 ), liquefied petroleum gas (LPG), hydrogen sulphide (H 2 S) and H 2 gas and it is observed that undoped LaCrO 3 shows response to H 2 S gas at relatively high operating temperature 300˚C. The La 1−x Sr x CrO 3 based sensor with x = 0.3 shows better sensitivity towards H 2 S gas at an operating temperature 210˚C. The effect of Sr doping on sensitivity, response time and recovery time of the sensor in the presence of H 2 S and other reducing gases were studied and discussed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.