کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1521133 | 1511798 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Iron incorporated Ia3d mesostructured silicate prepared at room temperature: Excellent Friedel-Crafts benzylation catalyst
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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![عکس صفحه اول مقاله: Iron incorporated Ia3d mesostructured silicate prepared at room temperature: Excellent Friedel-Crafts benzylation catalyst Iron incorporated Ia3d mesostructured silicate prepared at room temperature: Excellent Friedel-Crafts benzylation catalyst](/preview/png/1521133.png)
چکیده انگلیسی
The incorporation of Fe3+ ions in the framework of FDU-5, a cubic Ia3d silicate, with different Si/Fe ratio have been synthesized for the first time in room temperature under acidic condition employing solvent drying method without the necessity of pH adjustments. The synthesized samples, Fe-FDU-5, were investigated using different characterization techniques including XRD, N2 sorption, TEM, UV-vis, ESR, NH3-TPD, H2-TPR and pyridine-absorbed FT-IR techniques. The presence of isolated Fe3+ species and extraframework Fe2O3 particles were confirmed at all loadings (1.2-4.5Â wt% Fe). The N2 sorption studies of Fe-FDU-5 materials evidenced a specific surface area of 340-394Â m2/g, total pore volume of 0.41-0.44Â cm3/g and a narrow pore distribution of 4.4-4.9Â nm. Fe-FDU-5 are excellent catalysts for benzylation of benzene and is independent of acid sites. A near complete conversion of benzyl chloride (BnCl) was achieved in 20Â min over Fe-FDU-5 where as other metal ions including Al3+, Sn4+ and Mn2+or Mn3+ supported on various silica supports yielded only 3-8% BnCl conversion. Moreover, both framework Fe3+ and extraframework octahedral Fe species are found beneficial for this reaction, however, bulk Fe2O3 species are inactive.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 165, 1 September 2015, Pages 72-78
Journal: Materials Chemistry and Physics - Volume 165, 1 September 2015, Pages 72-78
نویسندگان
Vinju V. Srinivasan, Gaffar Imran, Rajamanickam Maheswari,