Green epoxidation of cyclooctene with molecular oxygen over an ecofriendly heterogeneous polyoxometalate-gold catalyst Au/BW₁₁/Al₂O₃

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• 作者：Umsa Jameel ; Ming-qiao Zhu ; Xin-zhi Chen&#8230
• 关键词：Key wordsNano gold ; Polyoxometalates (POMs) ; POM ; gold catalyst ; Cyclooctene epoxidation ; Molecular oxygen
• 刊名：Journal of Zhejiang University-SCIENCE A
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：17
• 期：12
• 页码：1000-1012
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Mechanical Engineering; Civil Engineering; Classical and Continuum Physics; Industrial Chemistry/Chemical Engineering;
• 出版者：Zhejiang University Press
• ISSN：1862-1775
• 卷排序：17

文摘

An ecofriendly heterogeneous polyoxometalate (POM)-gold catalyst Au/BW₁₁/Al₂O₃ was synthesized and used for solvent-free epoxidation of cyclooctene under mild reaction conditions using molecular oxygen as an oxidant and t-butyl hydroperoxide (TBHP) as an initiator. The catalyst was characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD), induced coupled plasma optical emission spectrometry (ICP-OES), and Brunauer-Emmett-Teller (BET). The catalyst showed good conversion and high selectivity without use of solvents or environmentally harmful oxidants. Moreover, the catalyst is recyclable up to three cycles with no significant loss in selectivity towards epoxide.