کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7146887 1462089 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cr-doped Co3O4 nanorods as chemiresistor for ultraselective monitoring of methyl benzene
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Cr-doped Co3O4 nanorods as chemiresistor for ultraselective monitoring of methyl benzene
چکیده انگلیسی
Ultrasensitive and selective detection of methyl benzenes was achieved for Co3O4 nanorods through Cr-doping. Pure and 1.17-1.89 at% Cr-doped Co3O4 nanorods were synthesized by a solvothermal reaction, followed by calcination at 400 °C for 2 h. The gas-sensing properties of the nanorods were tested to methyl benzene (toluene and xylene) and compared with interfering gases (benzene, ethanol, ammonia, CO and NO2) at various concentrations (0.25-5 ppm) and temperatures (250-350 °C). The results demonstrated that Cr-doping significantly enhanced the response to methyl benzenes while suppressing cross-responses to interfering gases, resulting in selectivity for methyl benzene. The ultraselectivity to methyl benzene in the Cr-doped Co3O4 nanorods was attributed to catalytic activity and the abundant adsorbed oxygen of the Cr oxides and Co3O4 for the partial oxidation of methyl benzenes to more active chemical species.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 201, 1 October 2014, Pages 482-489
نویسندگان
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