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Selective oxidation of benzyl alcohol to benzaldehyde over Co-metalloporphyrin supported on silica nanoparticles

Paper ID Volume ID Publish Year Pages File Format Full-Text
40724 45863 2012 9 PDF Available
Title
Selective oxidation of benzyl alcohol to benzaldehyde over Co-metalloporphyrin supported on silica nanoparticles
Abstract

Heterogenation of the metalloporhyrin ligand, [tetrakis(o-chlorophenyl)porphyrinato]Co(II) was effected by immobilizing the complex onto inorganic silica support to form spherical nanoparticles of RHAC-CoPor. This insoluble mesoporous hybrid showed a high specific surface area of 114 m2 g−1 and a pore volume of 0.177 cm3 g−1. The prepared catalyst possessed a narrow pore size distribution centered at around 4.17 nm. The 13C MAS NMR showed that RHAC-CoPor had three chemical shifts at 12.60, 26.60 and 45.18 ppm consistent with the three carbon atoms of the propyl group and a series of chemical shifts in the range of δ = 108–167 ppm consistent with the presence of the metalloporphyrin complex. Elemental analysis showed the successful immobilization of metalloporphyrin complex onto functionalized RHA silica support. RHAC-CoPor appeared to be an active catalyst in the oxidation of benzyl alcohol, producing 97.1% conversion and 97.7% selectivity for benzaldehyde under an ambient temperature of 70 °C. RHAC-CoPor could be regenerated and reused several times by washing with water, followed by drying at 100 °C.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (78 K)Download as PowerPoint slideHighlights► Tetrakis(o-chlorophenyl)porphyrinato Co(II) was immobilizing onto silica. ► The porphyrin–silica complex (RHAC-CoPor) formed spherical nanoparticles. ► RHAC-CoPor catalyzed the oxidation of benzyl alcohol to extent of 97.1%. ► A selectivity of 97.7% for benzaldehyde was achieved.

Keywords
Rice husk ash; Metalloporphyrin; Sol–gel technique; Nano particle; Oxidation; Benzyl alcohol
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Selective oxidation of benzyl alcohol to benzaldehyde over Co-metalloporphyrin supported on silica nanoparticles
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 445–446, 28 November 2012, Pages 252–260
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