期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 195, 期 -, 页码 303-312出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.01.042
关键词
Perovskite sensor; Catalytic activity; Gas sensing; Auto-combustion synthesis; Cross-sensitivity
资金
- IBSA-DST, Government of India
Highly sensitive, low temperature butane sensing characteristics are reported for nano-crystalline lanthanum iron oxide sensor. The improved butane sensing characteristics of these sensors are explained to be due to their efficient catalytic nature toward butane oxidation. Through infra-red spectroscopy in conjunction with X-ray photoelectron spectroscopy analysis we have demonstrated that the sensor catalytic activity is due to the presence of surface adsorbed oxygen species and hydroxyl ions. The desorbed water and oxygen molecules (originate from the surface adsorbed oxygen and hydroxyl group), initiate the catalytic oxidative dehydrogenation of butane at an operating temperature as low as 250 degrees C. We have also investigated the hydrogen, carbon monoxide and methane sensing performance of lanthanum ferrite sensors. The sensor found to be cross-sensitive to these gases. Thus, the selectivity coefficients for lanthanum ferrite butane sensors were estimated to be 1.67 and 4.67 for 50 ppm hydrogen and carbon monoxide sensing respectively. We have reported that first Fourier transform in conjunction with principal component analysis is fruitful to address the cross-sensitivity of nano-crystalline lanthanum ferrite sensor toward butane, hydrogen and carbon monoxide sensing. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据