Selective photocatalytic oxidation of benzyl alcohol and its derivatives into corresponding aldehydes by molecular oxygen on titanium dioxide under visible light irradiation
Selective photocatalytic oxidation of benzyl alcohol and its derivatives into corresponding aldehydes by molecular oxygen on titanium dioxide under visible light irradiation
复制标题
DOI：
10.1016/j.jcat.2009.06.018
复制
发表时间：
2009-09-10
影响因子：
7.3
通讯作者：
Sakata, Yoshihisa
中科院分区：
文献类型：
--
作者：
Higashimoto, Shinya;Kitao, Naoya;Sakata, Yoshihisa
在O-2气氛下，对苯甲醇及其衍生物，如4-甲氧基苯甲醇、4-氯苯甲醇、4-硝基苯甲醇、4-甲基苯甲醇、4-（三氟甲基）苯甲醇和4-叔丁基苯甲醇，在TiO 2光催化剂上以高转化率和高选择性进行了光催化氧化合成相应醛的研究。确认反应在UV光和可见光两者的照射下进行。特别是，可见光响应被观察到归因于一个特性的表面络合物形成的苯甲醇化合物的吸附在TiO 2表面上。在这里，作为这种选择性光催化氧化的活性中心的表面络合物的性质和反应背后的机制进行了研究。(C)2009 Elsevier Inc. All rights reserved.
The photocatalytic oxidation of benzyl alcohol and its derivatives, such as 4-methoxybenzyl alcohol, 4-chlorobenzyl alcohol, 4-nitrobenzyl alcohol, 4-methylbenzyl alcohol, 4-(trifluoromethyl)benzyl alcohol, and 4-tertiary-butylbenzyl alcohol, into corresponding aldehydes proceeded at high conversion and selectivity on a TiO2 photocatalyst under O-2 atmosphere. The reaction was confirmed to proceed under irradiation with both UV-light and visible light. In particular, the visible light response was observed to be attributed to a characteristic surface complex formed by the adsorption of a benzyl alcoholic compound on the TiO2 surface. Here, the properties of the surface complex as the active center for this selective photocatalytic oxidation and the mechanism behind the reaction have been investigated. (C) 2009 Elsevier Inc. All rights reserved.