کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
674130 1459543 2012 7 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal analysis of activated carbons modified with silver metavanadate
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موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Thermal analysis of activated carbons modified with silver metavanadate
چکیده انگلیسی

The effect of silver metavanadate doping on physicochemical properties and thermal behaviour of the activated carbons obtained from waste materials was investigated. The carbonaceous supports were subjected to carbonisation at 400 or 600 °C. The samples carbonised at 600 °C have much more developed surface area and porous structure than the analogous samples obtained at 400 °C. Impregnation of activated carbons with silver metavanadate leads to a decrease in their surface area and pore volume. According to thermal analysis (TG, DTG) in the samples containing 1 and 3 wt.% of silver metavanadate, AgVO3 is fully decomposed to do vanadium oxide and Ag, with no intermediate products, while in the samples containing 5 wt.% AgVO3, this salt is decomposed to vanadyl species as intermediate compounds at 350 °C before the formation of V2O5 at 500 °C. Moreover, in all samples impregnated with silver metavanadate the nanoparticles of silver undergo crystallisation leading to reduction of Ag+ ions from the vanadium salt to Ag0.

Figure optionsDownload as PowerPoint slideHighlights
► Preparation of the activated carbons from waste materials as new supports for AgVO3.
► Decomposition of AgVO3 to V2O5 and Ag0 for the samples 1 and 3 wt.% Ag-V is observed.
► Samples containing 5 wt.% Ag-V decompose to vanadyl species as intermediate compounds.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 541, 10 August 2012, Pages 42–48
نویسندگان
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