Ordered mesoporous Sn–TiO₂ catalysts via an evaporation induced self-assembly method for the Baeyer–Villiger oxidation of cyclohexanone by molecular oxygen

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• 作者：Zhiwei Zhou ; Yang Yu ; Pengcheng Yu ; Juan Qin…
• 关键词：Ordered mesoporous Sn–TiO2 ; Cyclohexanone ; Baeyer–Villiger oxidation ; Molecular oxygen
• 刊名：Reaction Kinetics, Mechanisms and Catalysis
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：120
• 期：1
• 页码：295-305
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Catalysis; Physical Chemistry; Industrial Chemistry/Chemical Engineering;
• 出版者：Springer Netherlands
• ISSN：1878-5204
• 卷排序：120

文摘

In order to improve the catalytic performance in the Baeyer–Villiger oxidation of cyclohexanone by molecular oxygen, ordered mesoporous Sn–TiO₂ catalysts with high Lewis acidity were successfully designed and synthesized via a facile one-pot evaporation induced self-assembly method. Their physical and chemical properties were characterized by different techniques including XRD, N₂ adsorption–desorption, UV–Vis spectra, ICP, Py-IR, SEM and TEM. The XRD, TEM and N₂ adsorption–desorption results showed that the ordered mesoporous structure can be preserved after tin incorporation. The UV–Vis, SEM and Py-IR results indicated that tin species can be homogeneously tetrahedrally incorporated in the crystalline framework of mesoporous anatase TiO₂ and create the Lewis acidity. The ordered mesoporous 15Sn–TiO₂ catalyst showed highest catalytic performance where cyclohexanone conversion of 91.4 % and ε-caprolactone selectivity of 93.2 %. Moreover, catalytic recycling tests demonstrated that the Sn–TiO₂ catalysts exhibited high potential reusability.