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Selective photocatalytic oxidation at TiO2/Ti anodes of 4-methoxybenzyl alcohol to the corresponding benzaldehyde in “green” conditions

Paper ID Volume ID Publish Year Pages File Format Full-Text
27379 44018 2011 5 PDF Available
Title
Selective photocatalytic oxidation at TiO2/Ti anodes of 4-methoxybenzyl alcohol to the corresponding benzaldehyde in “green” conditions
Abstract

The photosensitized electrochemical oxidation at a TiO2/Ti anode is, in itself, a “green” chemical strategy as the semiconductor remains unchanged during the experiments, the metal is safe, low energies are involved and experimental conditions are mild. In this context, the oxidation of 4-methoxybenzyl alcohol to 4-methoxybenzaldehyde has been carried out on the light of further “green chemistry” requirements: water as medium, NaCl as supporting electrolyte, exclusion of the reference electrode, Ti cathode (less expensive than the traditional Pt one) and Ti mesh (to optimize the cell geometry). In this study some chemical (alcohol conversion to aldehyde and material recovery) and electrochemical (current efficiency and density) parameters have been used to select the reaction conditions that are more suitable for this purpose. As concern the cell, the best geometry was realized with an immersion lamp, coaxial with a mesh cylindrical TiO2/Ti anode and a mesh Ti cathode.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► TiO2 as photoelectrochemical sensitizer. ► Sensitizer for the photooxidation of a benzyl alcohol to benzaldehyde. ► Oxidation in water following “green chemistry” requirements.

Keywords
TiO2; Photoelectrochemistry; Oxidation; Current density; Current efficiency
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Selective photocatalytic oxidation at TiO2/Ti anodes of 4-methoxybenzyl alcohol to the corresponding benzaldehyde in “green” conditions
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 222, Issue 1, 5 July 2011, Pages 180–184
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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