Selective Oxidation of Diphenylmethane Over Cobalt Doped Mesoporous Titania–Silica Catalyst with High Ti Content

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• 作者：Lu Tang ; Bin Li ; Zhongbiao Zhai ; Junjie Li ; Encai Ou and Jiaqiang Wang
• 关键词：Oxidation of diphenylmethane ; Benzophenone ; Co doped mesoporous titania–silica
• 刊名：Catalysis Letters
• 出版年：2008
• 出版时间：February, 2008
• 年：2008
• 卷：121
• 期：1-2
• 页码：63-69
• 全文大小：423.4 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Catalysis
  Physical Chemistry
  Industrial Chemistry and Chemical Engineering
  Pharmacy
  
• 出版者：Springer Netherlands
• ISSN：1572-879X

文摘

Cobalt doped mesoporous titania–silica with Ti/Si molar ratio of 0.5 (Co–TiO₂–SiO₂) was synthesized for the oxidation of diphenylmethane in acetic acid using aqueous hydrogen peroxide as oxidant for the first time. Fast hot catalyst filtration experiment proved that the catalyst acted as a heterogeneous one. Recycling of the catalyst indicates that the catalyst can be used a number of times without losing its activity to a greater extent. The effects of reaction time and reaction temperature on the performance of the catalyst were investigated. Moreover, cobalt doped mesoporous titania with a crystalline structure and cobalt doped mesoporous titania–silica with different molar ratio were also studied. It was found that Co–TiO₂–SiO₂ with Ti/Si molar ratio of 0.5 showed the highest activity.