کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7149904 1462120 2012 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Improvement of gas sensing performance of TiO2 towards NO2 by nano-tubular structuring
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Improvement of gas sensing performance of TiO2 towards NO2 by nano-tubular structuring
چکیده انگلیسی
Aligned nano-tubular TiO2 layers were synthesised and their gas sensing abilities were compared to those of magnetron sputtered titania films towards NO2 and CO. TiO2 nano-tubes were grown on the titanium foils, via anodic oxidation method (hereafter anodisation) using of fluoride containing ethylene glycol (EG)-based electrolytes. Both amorphous, nano-tubular titania structures and magnetron sputtered titania layers were annealed at 450 and 700 °C. Magnetron-sputtered titania films were anatase on deposition and converted to rutile on heat-treatment in air for 3 h at 800 °C. Nano-tubular titania layers were converted to anatase at about 400 °C and above 600 °C to rutile. The sensor performance of the nano-tubular TiO2 layers annealed at 450 °C (anatase) and at 700 °C (anatase and rutile) was investigated at 300-500 °C towards NO2 concentrations of 10, 25, 50 and 100 ppm and CO concentrations of 25, 50 and 75 ppm and compared to those of the magnetron sputtered TiO2-layers annealed at 450 °C (anatase) and 800 °C (rutile and anatase). The nano-tubular TiO2-sensor layers yield very promising results for sensing NO2 with some cross-sensitivity towards CO in relatively small concentrations and in a wide concentration range up to 500 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 169, 5 July 2012, Pages 151-160
نویسندگان
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