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Fe-MCM-41 nanoparticles as versatile catalysts for phenol hydroxylation and for Friedel–Crafts alkylation

Paper ID Volume ID Publish Year Pages File Format Full-Text
40713 45863 2012 8 PDF Available
Title
Fe-MCM-41 nanoparticles as versatile catalysts for phenol hydroxylation and for Friedel–Crafts alkylation
Abstract

Iron-containing MCM-41 nanoparticles (Fe-MCM-41 NPs) were successfully prepared using cetyltrimethylammonium bromide (CTAB) in sodium hydroxide medium at ambient temperature from both direct-hydrothermal and post-synthesis methods. The materials were characterized by X-ray diffraction, nitrogen adsorption/desorption isotherms, SEM, TEM, and UV–vis spectroscopy. The characterization results show the existence of highly ordered hexagonal mesopores in the nanoparticles and tetrahedral Fe species in the framework. In phenol hydroxylation with aqueous H2O2, Fe-MCM-41 nanoparticles displayed higher initial reaction rate than Fe-MCM-41 with larger particle size. It is proposed that the diffusion of the reactants is accelerated and the accessibility to the catalytic Fe species is enhanced in the shorter mesopore channels in Fe-MCM-41 nanoparticles. The recyclability potential of the nanoparticles was evaluated in the regeneration by room-temperature washing approach. Fe-MCM-41 NPs also appear to be suitable catalysts for the Friedel–Crafts alkylation of benzene with benzyl chloride.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (397 K)Download as PowerPoint slideHighlights► Fe-MCM-41 nanoparticles as versatile catalyst for phenol hydroxylation and for Friedel–Crafts alkylation of benzene. ► Higher initial reaction rate with Fe-MCM-41 nanoparticles compared with the relevant larger particles. ► More accessible Fe species in the framework via shorter mesopore channels.

Keywords
Fe-MCM-41 nanoparticles; Shorter mesopore channels; Phenol hydroxylation; Friedel–Crafts alkylation; Higher initial reaction rate
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Fe-MCM-41 nanoparticles as versatile catalysts for phenol hydroxylation and for Friedel–Crafts alkylation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 445–446, 28 November 2012, Pages 172–179
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