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Solvent-free aerobic alcohol oxidation using Cu/Nb2O5: Green and highly selective photocatalytic system

Paper ID Volume ID Publish Year Pages File Format Full-Text
46592 46442 2011 5 PDF Available
Title
Solvent-free aerobic alcohol oxidation using Cu/Nb2O5: Green and highly selective photocatalytic system
Abstract

Photooxidation of alcohols without organic solvents in the presence of O2 took place at the atmospheric pressure and room temperature over Nb2O5 and Cu/Nb2O5, avoiding the cost, toxicity, and purification problems associated with transition-metal systems. Loading of a small amount of copper on Nb2O5 significantly enhanced activity without lowering selectivity. On the other hand, loading of Pt, Ni, Rh, Ru, and Ag showed no promotion effect. The selectivities of the photooxidation of aliphatic, aromatic and heteroatom-containing alcohols over Cu/Nb2O5 were in the range of 80–99%. Cu/Nb2O5 was easily separated from the reaction mixture and was reusable without reducing the catalytic performance.

Graphical abstractSolvent-free aerobic oxidation of alcohols proceeds selectively at room temperature and atmospheric pressure by using Nb2O5 or Cu/Nb2O5 photocatalysts. Cu/Nb2O5 shows remarkably enhanced photocatalytic activity without lowering selectivity than Nb2O5 in oxidation of various alcohols.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Solvent-free aerobic oxidation of alcohols using Cu/Nb2O5 photocatalyst. ► Enhanced photocatalytic activity of Nb2O5 by the addition of Cu. ► The 1-phenylethanol is quantitatively converted to acetophenone under solvent-free and mild conditions.

Keywords
Alcohol oxidation; Niobium oxide; Photocatalyst; Selective oxidation; Solvent-free
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Solvent-free aerobic alcohol oxidation using Cu/Nb2O5: Green and highly selective photocatalytic system
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 110, 2 November 2011, Pages 216–220
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