کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7144856 | 1462065 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced CO2-sensing response of nanostructured cobalt aluminate synthesized using a microwave-assisted colloidal method
ترجمه فارسی عنوان
پاسخ حساسیت به دی اکسید کربن نانوساختاری پیشرفته سنتز شده با استفاده از روش کلوئیدی مایع با استفاده از مایکروویو
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کلمات کلیدی
آلومینات کبالت، سنسور گاز، امپدانس، نانوذرات،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
Blue powders of nanostructured cobalt aluminate were synthesized using a microwave-assisted colloidal method applied in a non-aqueous medium, using dodecylamine as a surfactant. X-ray diffraction, UV-vis, and Raman measurements showed that single-phase CoAl2O4 was obtained when a calcination temperature of 800 °C was used. Extensive porosity was observed in the powders using scanning electron microscopy. Transmission electron microscopy studies showed that irregular-shaped nanoparticles with an average size of â¼9 nm were obtained. The gas-sensing properties were measured on thick films prepared using CoAl2O4 powder. The sensing response at different frequencies was determined by measuring the magnitude of the impedance (|Z|) in air, and CO2. The results showed that the cobalt aluminate material produced here could be used to detect concentrations of 50 and 100 ppm of carbon dioxide at temperatures of 200-250 °C with a response time of between 5 and 15 s. Better recovery times (11-25 s) and a reproducible dynamic response were also achieved.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 226, April 2016, Pages 518-524
Journal: Sensors and Actuators B: Chemical - Volume 226, April 2016, Pages 518-524
نویسندگان
J.P. Morán-Lázaro, O. Blanco, V.M. RodrÃguez-Betancourtt, J. Reyes-Gómez, C.R. Michel,