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

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Abstract

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.

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Acknowledgments

The authors thank the National Natural Science Foundation of China (Project 20463003) and Natural Science Foundation of Yunnan Province (Project 2004E0003Z) for financial support. We also thank Center for Advanced Studies of Medicinal and Organic Chemistry, Yunnan University for partial financial support.

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Authors and Affiliations

  1. Department of Applied Chemistry, Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry of Education, Yunnan University, Kunming, 650091, P. R. China

    Lu Tang, Bin Li, Zhongbiao Zhai, Junjie Li, Encai Ou & Jiaqiang Wang

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  1. Lu Tang
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  2. Bin Li
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  3. Zhongbiao Zhai
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  4. Junjie Li
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  5. Encai Ou
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  6. Jiaqiang Wang
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Correspondence to Jiaqiang Wang.

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Tang, L., Li, B., Zhai, Z. et al. Selective Oxidation of Diphenylmethane Over Cobalt Doped Mesoporous Titania–Silica Catalyst with High Ti Content. Catal Lett 121, 63–69 (2008). https://doi.org/10.1007/s10562-007-9293-4

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  • DOI: https://doi.org/10.1007/s10562-007-9293-4

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