کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5360492 | 1388262 | 2010 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The role of W doping in response of hydrogen sensors based on MAO titania films
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The role of W doping in response of hydrogen sensors based on MAO titania films The role of W doping in response of hydrogen sensors based on MAO titania films](/preview/png/5360492.png)
چکیده انگلیسی
Anatase TiO2 and W doped TiO2 films were fabricated by micro-arc oxidation (MAO) on titanium substrates and their hydrogen sensing properties were investigated. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the oxide films and electrochemical impedance spectroscopy (EIS) was applied to investigate the gas sensing mechanism. It is found that the conductivity of TiO2 films varies with the introduction of W dopant. EIS analysis reveals that the grains and especially the grain boundaries are mainly contributed to the hydrogen response and their equivalent circuits could be represented electrochemically by parallel resistor and constant phase element (CPE). The enhanced sensor signal at higher measuring temperature (300 °C) is observed with an optimal doping concentration of W ions (1.81 at.%).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 256, Issue 12, 1 April 2010, Pages 3735-3739
Journal: Applied Surface Science - Volume 256, Issue 12, 1 April 2010, Pages 3735-3739
نویسندگان
Fujian Ren, Yunhan Ling, Jiayou Feng,