Photocatalytic conversion of nitroaromatic compounds in the presence of TiO2
Photocatalytic conversion of nitroaromatic compounds in the presence of TiO2
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DOI：
10.1016/j.cattod.2009.01.029
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发表时间：
2009-06-15
期刊：
影响因子：
5.3
通讯作者：
Bahnemann, Detlef
中科院分区：
文献类型：
--
作者：
Hakki, Amer;Dillert, Ralf;Bahnemann, Detlef
固体光催化剂（TiO2）和助催化剂（对甲苯磺酸）的组合已成功应用于硝基苯五种不同衍生物（邻硝基甲苯（o-NT）、间硝基甲苯（m-NT）、对硝基甲苯（p-NT）、5-硝基间二甲苯（DMNB）和对硝基苯酚（p-NPh））的光诱导转化。不含 O-2 的乙醇悬浮液，产生取代的喹啉和四氢喹啉。对辐照混合物的 GC-MS 分析表明，当使用 DMNB、m-NT 和 p-NPh 作为底物时，形成的主要产物是取代的喹啉，而当使用 o- 和 p-NT 时，则得到乙氧基四氢喹啉。选择 DMNB 作为模型底物，进行更详细的研究，重点研究光催化剂、助催化剂和硝基芳香族化合物的浓度对产物产率的影响。根据 GC-MS 检测到的化合物，讨论了反应机理。 (C) 2009 Elsevier B.V. 保留所有权利。
The combination of a solid photocatalyst (TiO2) and a co-catalyst (p-toluenesulfonic acid) has been successfully applied for the light-induced conversion of five different derivatives of nitrobenzene (o-nitrotoluene (o-NT), m-nitrotoluene (m-NT), p-nitrotoluene (p-NT), 5-nitro-m-xylene (DMNB), and p-nitrophenol (p-NPh)) in O-2-free ethanolic suspensions yielding substituted quinolines and tetrahydroquinolines. GC-MS analysis of the irradiated mixtures showed the formation of substituted quinolines as the main products when DMNB, m-NT, and p-NPh were employed as substrates, while ethoxy-tetrahydroquinolines were obtained when o- and p-NT were used. DMNB has been chosen as model substrate for a more detailed study focusing on the influence of the concentration of the photocatalyst, the co-catalyst, and the nitroaromatic compound on the yield of the products. Depending on the compounds that have been detected by GC-MS the reaction mechanism is discussed. (C) 2009 Elsevier B.V. All rights reserved.