کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7149016 | 1462114 | 2013 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Two types of moisture effects on the receptor function of neat tin oxide gas sensor to oxygen
ترجمه فارسی عنوان
دو نوع از اثرات رطوبت بر عملکرد گیرنده حسگر گاز اکسید قلع شسته شده به اکسیژن
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کلمات کلیدی
سنسور گاز، اکسید قلع، جذب، بخار آب، اکسیژن، مقاومت،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
Influences of moisture on the response of a neat tin oxide gas sensor to oxygen at 623Â K were investigated. Two types of moisture effects were easily recognized, that is, moisture acted as a inhibitor to the oxygen adsorption in form of Oâ (type I sites) and O2â (type II sites) by being adsorbed competitively (short term effect), whereas the moisture admitted at elevated temperature acted as a promoter to increase the population of type II sites or the adsorptive strength of type I sites (long term effect). A tremendous increase of the type II site population as well as the existence of threshold pressure for oxygen adsorption on the same sites suggests the formation of a sort of surface hydrate, dehydration of which seems to leave type II sites behind. The response to oxygen could be reproduced satisfactorily by using adsorption constants of oxygen and water, threshold pressure of oxygen and semiconductor properties of tin oxide.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 176, January 2013, Pages 443-452
Journal: Sensors and Actuators B: Chemical - Volume 176, January 2013, Pages 443-452
نویسندگان
Noboru Yamazoe, Koichi Suematsu, Kengo Shimanoe,