کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5365477 1388331 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development of TREN dendrimers over mesoporous SBA-15 for CO2 adsorption
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Development of TREN dendrimers over mesoporous SBA-15 for CO2 adsorption
چکیده انگلیسی
Mesoporous SBA-15 was synthesized using rice husk ash (RHA) as the silica source and their defective Si-OH groups were grafted with tris(2-aminoethyl) amine (TREN) dendrimers generation through step-wise growth technique. The X-ray diffraction (XRD) and nitrogen adsorption/desorption results of parent SBA-15 obtained from RHA, suggests its resemblance with SBA-15 synthesized using conventional silica sources. Furthermore, the nitrogen adsorption/desorption results of SBA-15/TREN dendrimer generations (G1-G3) illustrates the growth of dendrimer inside the mesopores of SBA-15 and their CO2 adsorption capacity was determined at 25 °C. The maximum CO2 adsorption capacity of 5-6 and 7-8 wt% over second and third dendrimer generation was observed which is discernibly higher than the reported melamine and PAMAM dendrimers. The experimental CO2 adsorption capacity was found to be less than theoretically calculated CO2 adsorption capacity due to inter and intra molecular amidation as result of steric hindrance during the dendrimer growth. These SBA-15/TREN dendrimer generations also exhibit thermal stability up to 350 °C and CO2 adsorption capacity remains unaltered upon seven consecutive runs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 256, Issue 22, 1 September 2010, Pages 6660-6666
نویسندگان
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