Liquid phase oxidation of p-chlorotoluene to p-chlorobenzaldehyde over cobalt-doped mesoporous titania with a crystalline framework
Liquid phase oxidation of p-chlorotoluene to p-chlorobenzaldehyde over cobalt-doped mesoporous titania with a crystalline framework
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DOI：
10.1016/j.molcata.2006.01.040
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发表时间：
2006-05
影响因子：
--
通讯作者：
Jiaqiang Wang;Hua Fang;Li Ying;Junjie Li;Zhiyin Yan
中科院分区：
文献类型：
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作者：
Jiaqiang Wang;Hua Fang;Li Ying;Junjie Li;Zhiyin Yan
采用表面活性剂模板法合成的钴掺杂介孔二氧化钛首次在醋酸溶液中以双氧水为氧化剂催化氧化对氯甲苯合成对氯苯甲醛的反应中表现出较高的选择性（99%）和合理的转化率（49%）。催化剂的再循环表明催化剂可以使用多次而不会在更大程度上损失其活性。相比之下，没有晶体结构的钴掺杂的介孔二氧化钛和钴掺杂的商业二氧化钛，通过浸渍法制备的具有类似浓度的钴的Degussa P25被发现是无活性的。考察了催化剂浓度、反应时间、反应温度和溶剂对催化剂性能的影响。
Cobalt-doped mesoporous titania with a crystalline framework synthesized by surfactant templating method presented highly selective (99%) and reasonable conversion rate (49%) of catalytic oxidation of para-chlorotoluene to para-chlorobenzaldehyde in acetic acid using aqueous hydrogen peroxide as oxidant for the first time. Recycling of the catalyst indicates that the catalyst can be used a number of times without losing its activity to a greater extent. By contrast, cobalt-doped mesoporous titania without a crystalline structure and cobalt doped the commercial titania, Degussa P25 prepared by impregnation method with the similar concentration of cobalt were found inactive. The effects of catalyst concentration, reaction time, reaction temperature, and solvents on the performance of the catalyst were also investigated.