کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7147104 1462095 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Low temperature butane sensing using catalytic nano-crystalline lanthanum ferrite sensing element
ترجمه فارسی عنوان
حسگر بوتان با دمای پایین با استفاده از عنصر سنجش فریت لانتانیم کاتالیزوری نانوکریستال
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
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 °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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 195, May 2014, Pages 303-312
نویسندگان
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