Characterization of Sol-Gel Derived CuO@SiO2 Nano-catalysts towards Gas Phase Oxidation Reactions
- سال انتشار: 1393
- محل انتشار: پنجمین کنگره بین المللی نانو و فناوری نانو (ICNN2014)
- کد COI اختصاصی: ICNN05_705
- زبان مقاله: انگلیسی
- تعداد مشاهده: 573
نویسندگان
Materials Research School, NSTI, Isfahan, Iran
Radiation Application Research School, NSTI, Karaj, Iran
Computer Engineering and Information Technology Department, Amirkabir University, Tehran, Iran.
چکیده
One distinct concentration of copper was embedded into the silica matrix to xerogel form using coppersourceCu(NO3)2∙3H2O. The xerogel samples were prepared by hydrolysis and condensation of tetraethyl orthosilicate(TEOS) by the sol-gel method. In this investigation, new molar ratio of H2O/TEOS was determined to be 11.7. Also,the necessary amount of tri-hydrated copper nitrate was added to the solution in such a manner that the concentration ofthe copper oxide in final solution reach to 10-12 wt %. After ambient drying, the xerogel samples were heated at 100,200, 400, 800 and 1000˚C at a slow heating rate (50°C/h). The structural properties were characterized by transmissionelectron microscopy (TEM), surface analysis (BET) and thermal program reduction (TPR) and TPO methods atdifferent temperatures. Finally, catalytic behaviour of nano-composites was studied for carbon monoxide and nitrogenmonoxide oxidation reactions. The results were presented the systematic reactivity study of CO & NO oxidation ondispersed copper oxide nano-catalysts over silica supports, in order to determine the ability of these materials to convertcarbon monoxide and nitrogen monoxide into harmless species by different reaction paths.کلیدواژه ها
Copper oxide, Nanocomposite, Thermal treatment, Oxidation Reactionاطلاعات بیشتر در مورد COI
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