کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9700911 1462132 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development of a WO3 thick-film-based sensor for the detection of VOC
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Development of a WO3 thick-film-based sensor for the detection of VOC
چکیده انگلیسی
A highly sensitive gas sensor for the detection of aromatic hydrocarbons has been developed using a WO3 thick film where Pd and Pt were applied as catalyst to a limited and most sensitive area of the film to the change in bulk resistance. WO3 thick films with different mean grain size and film thickness were prepared to investigate characteristics of the films to aromatic hydrocarbon gases at various operating temperatures. The film operated at 400 °C with mean grain size of 85 nm and thickness of 35 μm was found to be ideal for the detecting target gases. The sensitivities of the sensor were investigated by measuring toluene, ethylbenzene, styrene and m-xylene at a concentration range of 10-1000 ppb and some of interference gases at a range of 0.1-500 ppm. The sensor showed extremely high sensitivities to the aromatic hydrocarbon gases, and the changes in the film resistance were more than two times even at concentration of 10 ppb. By contrast, the sensor showed very low sensitivity to the interference gases.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 108, Issues 1–2, 22 July 2005, Pages 97-101
نویسندگان
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