Peroxotungstate-Based Ionic Hybrid as a Triphase Heterogeneous Catalyst for Efficient Benzyl Alcohol Oxidation Under Mild Conditions

被引：0
|
作者：
Jin, Manman [1 ]
Niu, Qingtao [1 ]
Si, Chongdian [1 ]
Lv, Zhiguo [2 ]
Guo, Hongyue [3 ]
Guo, Zhenmei [2 ]
机构：
[1] Department of Chemistry and Chemical Engineering, Jining University, No.1 Xingtan Road, Qufu,273155, China
[2] State Key Laboratory Base for Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao,266042, China
[3] College of Chemical Engineering, China University of Petroleum (East China), Qingdao,266580, China
来源：
Catalysis Letters | 2020年 / 150卷 / 06期
关键词：
Ionic liquids;
D O I：
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学科分类号：
摘要：
Abstract: Supported ionic-liquid-phases (SILPs) were synthesized via reaction of 1-methyl-3-(3-triethoxysilylpropyl)imidazolium hexafluorophosphate (ImCl-PF6) with SBA-15 and then peroxotungstate molecules were immobilized on SILPs. The resulting material (W-ImCl-PF6-SBA-15) was characterized via 29Si MAS NMR to detect the chemical environment around Si and its textural and thermogravimetric behavior were determined. To obtain insight into the role of ImCl-PF6 during catalysis, an ImCl-PF6-free catalyst (W/SBA-15) was also synthesized. W-ImCl-PF6-SBA-15 and W/SBA-15 were investigated as catalysts for benzyl alcohol oxidation, as a model reaction, under solvent-free conditions with H2O2.The presence of ImCl-PF6 was crucial for obtaining excellent catalytic activity, and W-ImCl-PF6-SBA-15 showed higher activity and stability than these of W/SBA-15. Optimized reaction conditions were employed to several selected alcohols oxidation and, remarkably, excellent aldehydes selectivity was achieved. The importance of ImCl-PF6-functionalized SBA-15 was evidenced via recycling experiments of benzyl alcohol oxidation, and W-ImCl-PF6-SBA-15 was recycled for ten reaction runs without significant change in benzyl alcohol conversion, benzaldehyde selectivity, and tungsten content. Graphic Abstract: [Figure not available: see fulltext.]. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.
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页码：1692 / 1706
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