کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7140041 1462024 2018 42 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
NO2 sensing properties of SmFeO3 porous hollow microspheres
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
NO2 sensing properties of SmFeO3 porous hollow microspheres
چکیده انگلیسی
Porous hollow microspheres of SmFeO3 were prepared from a simple process involving a metal organic framework (MOF) compound as the templating precursor. With a diameter of about 2 μm, these hollow-centered microspheres are formed by nanoporous thin walls of SmFeO3. Chemoresistive gas sensors based on these microspheres exhibits excellent sensing performance on NO2 at 200 °C, including high sensitivity (response of 10.2 under 200 ppb) with detection limit as low as 50 ppb, high selectivity, and reasonably short time for response and recovery (369 s/478 s). The superior sensing response over other SmFeO3-based NO2 sensors can be ascribed to the electron-accepting reactions during NO2 adsorption, which is facilitated by the special morphological features of the microsphere.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 265, 15 July 2018, Pages 443-451
نویسندگان
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