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Direct synthesis, characterization and catalytic performance of Al-SBA-15 mesoporous catalysts with varying Si/Al molar ratios

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Abstract

Through a directly hydrothermal process and utilizing Pluronic P123 triblock polymer (EO20PO70EO20, Mav = 5800) as a template, Al-SBA-15 mesoporous materials have been prepared with different Si/Al molar ratios. The materials were characterized by XRD, ICP-OES, SEM, TEM, Py FT-IR, N2 adsorption–desorption and NH3-TPD techniques. Meanwhile, the catalytic performance of the Al-SBA-15 materials was investigated through Friedel–Crafts alkylation of 2,4-ditert-butyl-phenol with cinnamyl alcohol. Characterization results showed that the catalysts contain a variety of acid sites whose contents vary in a systematic manner with various Si/Al molar ratios of the materials, and have a higher catalytic activity in the alkylation reaction of phenol with tert-butanol. It was found that the Al-SBA-15 samples with good mesoporous structure are highly reusable preserving most of their catalytic activity after five cycles.

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Acknowledgments

We would like to thank the financial support from the Innovation Experiment Fund of Zhengzhou University (No. 2010cxsy089).

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Correspondence to Ke Zhang.

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Zheng, X., Dong, B., Yuan, C. et al. Direct synthesis, characterization and catalytic performance of Al-SBA-15 mesoporous catalysts with varying Si/Al molar ratios. J Porous Mater 20, 539–546 (2013). https://doi.org/10.1007/s10934-012-9626-6

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