Alcohol‐Selective Oxidation in Water under Mild Conditions via a Novel Approach to Hybrid Composite Photocatalysts

ChemistryOpen

Dr. Ali Abd-Elaal⁵  Dr. Francesco Parrino⁴  Dr. Rosaria Ciriminna²  Prof. Vittorio Loddo³  Prof. Leonardo Palmisano¹ 

[1] E-mail address: E-mail address: 关键词: alcohol oxidation;    composites;    nanostructures;    photocatalysis;    titanium dioxide;   

DOI  :  10.1002/open.201500110

来源: Wiley

【 摘 要 】

Abstract

The oxidation of alcohols to carbonyl compounds in a clean fashion (i.e., with water as a solvent or under solvent-free conditions, and using O₂ or H₂O₂ as the primary oxidant) is the subject of considerable research efforts. A new approach for the selective oxidation of soluble aromatic alcohols in water under mild conditions via a novel composite photocatalyst has been developed. The catalyst is synthesized by grafting 4-(4-(4-hydroxyphenylimino)cyclohexa-2,5dienylideneamino)phenol and silver nanoparticles onto the surface of moderately crystalline titanium dioxide. The titanium dioxide-based composite was first extensively characterized and then employed in the catalytic oxidation of 4-methoxybenzyl alcohol to 4-methoxybenzaldehyde under UV irradiation in water at room temperature. The corresponding aldehyde was obtained with unprecedented high selectivity (up to 86 %). The method is general and opens the route to fabrication of photocatalytic composites based on titanium dioxide functionalized with shuttle organic molecules and metal nanoparticles for a variety of oxidative conversions.

【 授权许可】

CC BY-NC   
© 2015 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.

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