Microstructure and H2S gas sensing properties of nanocrystalline perovskite-type La0.6Co0.4Mn0.5Ni0.5O3

被引：4

作者：

Bodade, A. B. ^{[1
]}

Alvi, Minaz ^{[1
]}

Kadu, A. V. ^{[1
]}

Chaudhari, G. N. ^{[1
]}

机构：

[1] Shri Shivaji Sci Coll, Nano Technol Res Lab, Dept Chem, Amravati 444602, Maharashtra, India

来源：

JOURNAL OF MATERIALS SCIENCE | 2010年 / 45卷 / 19期

关键词：

THICK-FILM RESISTORS; SENSITIVITY; SENSORS; TEMPERATURE; HYDROGEN; IONS; NH3;

D O I：

10.1007/s10853-010-4569-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanocrystalline La1-x Co (x) Mn1-y Ni (y) O-3 (x = 0.2 and 0.4; y = 0.1, 0.3, and 0.5) thick films sensors prepared by sol-gel method were studied for their H2S gas sensitivity. The structural and morphological properties have been carried out by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Average particle size estimated from XRD and TEM analyses was observed to be 30-35 nm. The gas response characteristics were found to depend on the dopants concentration and operating temperature. The maximum H2S gas response of pure LaMnO3 was found to be at 300 A degrees C. In order to improve the gas response, material doped with transition metals Co and Ni on A- and B-site, respectively. The La0.6Co0.4Mn0.5Ni0.5O3 shows high response towards H2S gas at an operating temperature 250 A degrees C. The Pd-doped La0.6Co0.4Mn0.5Ni0.5O3 sensor was found to be highly sensitive to H2S at an operating temperature 200 A degrees C. The gas response, selectivity, response time and recovery time were studied and discussed.

引用

页码：5264 / 5270

页数：7

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