Adsorption-driven photocatalytic activity of mesoporous titanium dioxide
Adsorption-driven photocatalytic activity of mesoporous titanium dioxide
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DOI：
10.1021/ja053265s
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发表时间：
2005-09-21
影响因子：
15
通讯作者：
Hirai, T
中科院分区：
文献类型：
--
作者：
Shiraishi, Y;Saito, N;Hirai, T
具有介孔结构的二氧化钛在水中被光激活时，表现出前所未有的光催化活性，这主要受分子在催化剂表面的吸附程度的强烈驱动，这促进了被良好吸附的分子的优先转化。这催化了一种选择性转化，将一个吸附良好的分子转化为一个吸附较差的分子，即所谓的“粘-离开”转化，这种转化促进了苯直接羟基化成苯酚，这是最困难的合成反应之一，具有非常高的选择性（bbb80 %），并且使用水作为氧化剂。
Titanium dioxide with a mesoporous structure, when photoactivated in water, demonstrates an unprecedented photocatalytic activity, driven strongly by an adsorption degree of molecules onto the catalyst surface, which promotes a preferential conversion of a well-adsorbed molecule. This catalyzes a selective transformation of a well-adsorbed molecule into a less-adsorbed molecule, so-labeled “stick-and-leave” transformation, which promotes a direct hydroxylation of benzene to phenol, one of the most difficult synthetic reactions, with very high selectivity (>80%) and using water as a source of oxidant.