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Photocatalytic selective oxidation of 4-methoxybenzyl alcohol to aldehyde in aqueous suspension of home-prepared titanium dioxide catalyst

被引：167
作者：
Palmisano, Giovanni
Yurdakal, Sedat
Augugliaro, Vincenzo
Loddo, Vittorio
Palmisano, Leonardo
机构：
[1] Univ Palermo, Dipartimento Ingn Chim Proc & Mat, I-90128 Palermo, Italy
[2] Anadolu Univ, Fen Fak, Kimya Bolumu, TR-26470 Eskisehir, Turkey
来源：
ADVANCED SYNTHESIS & CATALYSIS | 2007年 / 349卷 / 06期
关键词：
p-anisaldehyde production; photocatalysis; selective oxidation; titanium dioxide;
D O I：
10.1002/adsc.200600435
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The photocatalytic oxidation of 4-methoxybenzyl alcohol to p-anisaldehyde (PAA) was performed in water with organic-free suspensions of home-prepared and commercial titanium dioxide (TiO2) catalysts. The nanostructured TiO2 samples were synthesised by boiling aqueous solutions of titanium tetrachloride (TiCl4) under mild conditions, for different times. The crystallinity increased with the boiling time. The 4-methoxybenzyl alcohol oxidation rate followed the same pattern but the highest yield (41.5% mol) to PAA was found for the least crystalline sample, that showed a quantum efficiency of 0.116%. A comparison with two commercial TiO2 samples showed that all the home-prepared catalysts exhibited a PAA yield higher than that of commercial ones. The only by-products present were traces of 4-methoxybenzoic acid and aliphatic products, carbon dioxide being the other main oxidation product.
引用
收藏
页码：964 / 970
页数：7
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