文章基本信息

标题：Structural Characterization of Nanocrystalline La_1-xSr_xCrO₃ Thick Films for H₂S Gas Sensors
本地全文：下载
作者：Ashish V. Kadu ; Archana B. Bodade ; Anjali B. Bodade 等
期刊名称：Journal of Sensor Technology
印刷版ISSN：2161-122X
电子版ISSN：2161-1238
出版年度：2012
卷号：2
期号：1
页码：13-18
DOI：10.4236/jst.2012.21003
出版社：Scientific Research Publishing
摘要：The nanocrystalline of La_1-xSr_xCrO₃ (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_0.7Sr_0.3CrO₃in the range of 30 - 35 nm. The gas sensing properties were studied towards reducing gases like Ammonia gas (NH3), liquefied petroleum gas (LPG), hydrogen sulphide (H₂S) and H₂ gas and it is observed that undoped LaCrO₃ shows response to H₂S gas at relatively high operating temperature 300°C. The La_1-xSr_xCrO₃ based sensor with x = 0.3 shows better sensitivity towards H₂S 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 H₂S and other reducing gases were studied and discussed.
关键词：La_1-xSr_xCrO₃; H₂S Gas; Selectivity; Response & Recovery Time