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A simple co-impregnation route to load highly dispersed Fe(III) centers into the pore structure of SBA-15 and the extraordinarily high catalytic performance

Paper ID Volume ID Publish Year Pages File Format Full-Text
42756 45940 2009 8 PDF Available
Title
A simple co-impregnation route to load highly dispersed Fe(III) centers into the pore structure of SBA-15 and the extraordinarily high catalytic performance
Abstract

Highly dispersed iron centers supported on SBA-15 were successfully prepared via a simple incipient wetness co-impregnation route by casting furfuryl alcohol (FA) solution of iron (III) acetylacetonate (Fe(acac)3), which were used as carbon and iron sources, respectively, into the pore structure of SBA-15, followed by the subsequent removal of carbonized FA. Various techniques such as XRD, TEM, N2 sorption, UV–vis, XPS and EPR, were employed to characterize the prepared catalysts. It was shown that both Fe2O3 nanoclusters and isolated iron species were present and highly dispersed onto the pore surface of SBA-15, due to the presence of abundant carbon source co-impregnated, with well-maintained, highly ordered and open mesoporous structure. A great number of acidities was introduced by the loading of Fe2O3, and the catalytic performance was tested on the Friedel–Crafts benzylation of benzene by benzyl chloride. Under the optimized reaction condition, the catalyst showed a superior catalytic performance with a 100% yield of monoalkylated product within 1.5 min at 60 °C. The catalyst demonstrated high reusability and stability, the yield of diphenylmethane was still higher than 90% after 6 runs. Moreover, the catalyst was still active at the temperature as low as 40 °C. Such a strategy is verified applicable to prepare other well-dispersed metal oxides, i.e. MnxOy loaded into the pore structure of mesoporous materials.

Graphical abstractHighly dispersed iron centers supported on SBA-15 were successfully prepared via a simple incipient wetness co-impregnation route of carbon and iron sources into the pore structure of SBA-15. The catalyst demonstrates high reusability and stability, and the yield of diphenylmethane was still higher than 90% after 6 runs. The strategy is also verified to be applicable to prepare other well-dispersed metal oxides, i.e. MnxOy loaded on mesoporous materials.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
SBA-15; High dispersivity; Iron oxide; Incipient wetness impregnation; Catalytic activity
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A simple co-impregnation route to load highly dispersed Fe(III) centers into the pore structure of SBA-15 and the extraordinarily high catalytic performance
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 366, Issue 1, 15 September 2009, Pages 57–64
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us