Ethane-Bridged Organosilica Nanotubes Functionalized with Arenesulfonic Acid and Phenyl Groups for the Efficient Conversion of Levulinic Acid or Furfuryl Alcohol to Ethyl Levulinate

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• 作者：Daiyu Song ; Sai An ; Yingnan Sun ; Panpan Zhang ; Prof. Dr. Yihang Guo and Prof. Dr. Dandan Zhou
• 刊名：ChemCatChem
• 出版年：2016
• 出版时间：June 21, 2016
• 年：2016
• 卷：8
• 期：12
• 页码：2037-2048
• 全文大小：1836K
• ISSN：1867-3899

文摘

A series of ethane-bridged organosilica nanotubes functionalized with arenesulfonic acid and phenyl groups (ArSO₃H-Si(Et)Si-Ph-NTs) was fabricated successfully by a P123-directed sol–gel co-condensation route combined with hydrothermal treatment with a carefully adjusted P123-to-bis-silylated organic precursor-to-HCl molar ratio in the starting system. The morphological characteristics, textural properties, Brønsted acidity, surface hydrophobicity, and structural integrity of the carbon/silica framework were characterized. The ArSO₃H-Si(Et)Si-Ph-NTs materials were applied in the synthesis of ethyl levulinate from the esterification of levulinic acid and the ethanolysis of furfuryl alcohol, and the excellent catalytic activity was explained in terms of the strong Brønsted acidity, unique hollow nanotube morphology, and enhanced surface hydrophobicity. Reusability tests confirmed that ArSO₃H-Si(Et)Si-Ph-NTs can be reused for three or five times without a significant loss of activity.