Fabrication of highly active Sn/W mixed transition-metal oxides as solid acid catalysts |
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Authors: | Zhiwang Yang Lengyuan Niu Zhenhong Ma Hengchang Ma Ziqiang Lei |
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Institution: | (1) Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, China;(2) Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China; |
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Abstract: | Catalytically active Sn/W mixed transition-metal oxides were prepared by calcination of the corresponding Sn/W hydroxide precursors
at different temperatures. The obtained mixed oxides were characterized by physicochemical and spectroscopic methods. With
variation of the molar ratios of Sn/W, the prepared Sn/W mixed oxide catalysts had different reaction activities. Thus, the
Sn/W-2-800 oxide acted as an effective heterogeneous catalyst for the Baeyer–Villiger oxidation of ketones and the Friedel–Crafts
reaction. Many ketones, as well as benzyl alcohol and acetic anhydride, were transformed into the corresponding products with
high conversion and selectivity. The catalysts can be easily separated from the reaction mixtures and can be reused for at
least five cycles without significant loss of activity. |
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Keywords: | |
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