Photocatalytic oxidation of aldehydes: Byproduct identification and reaction pathway

被引：49

作者：

Ye, Xuejun ^{[1
]}

Chen, Daniel ^{[1
]}

Gossage, John ^{[1
]}

Li, Kuyen ^{[1
]}

机构：

[1] Lamar Univ, Dept Chem Engn, Beaumont, TX 77710 USA

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2006年 / 183卷 / 1-2期

关键词：

photocatalysis; aldehyde; byproduct identification; titania; reaction pathway; mechanism;

D O I：

10.1016/j.jphotochem.2006.02.019

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The byproducts and reaction pathway of gas phase photocatalytic oxidation (PCO) of butyraldehyde, propionaldehyde and acetaldehyde over aerogel TiO2 under weak black light were studied by means of liquid nitrogen trapping, water extraction, mass spectrometry and carbon balance. Aldehydes were photocatalytically oxidized to corresponding acids, shorter carbon-chain aldehydes, carbon dioxide and water. The so-generated acids were further oxidized to shorter carbon-chain aldehydes, carbon dioxide, and water. Other side reactions were suppressed. The reaction pathway we found can be explained in a straightforward manner with active O-* as well as hydroxyl group as the major oxidants. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：35 / 40

页数：6

共 22 条

[1] VOC photodegradation at the gas-solid interface of a TiO2 photocatalyst -: Part I:: 1-butanol and 1-butylamine [J].