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Journal of Materials Science

, Volume 44, Issue 24, pp 6736–6740 | Cite as

Lewis and Brønsted acids in super-acid catalyst SO42−/ZrO2–SiO2

  • Yan Wang
  • Jinghong Ma
  • Dong Liang
  • Meimei Zhou
  • Fuxiang Li
  • Ruifeng LiEmail author
Mesostructured Materials

Abstract

Super-acid catalyst, SO42−/ZrO2–SiO2, with high zirconium loading was synthesized and the nature of the surface acid was investigated by FT-IR of pyridine adsorption. With the increasing ZrO2 content, the Lewis and Brønsted acid sites increased and reached the maximum when Zr/Si (molar ratio) = 1.3. The sample with Zr/Si = 1.3 showed the strongest IR adsorption band in the S=O stretching region (1,300–1,400 cm−1). Pyrosulfate and monosulfate species existed on the surface of the catalysts and the acidic strength could be enhanced by induction effect of their S=O groups. And there were two kinds of Brønsted acid sites on the surface of the catalysts.

Keywords

Acid Site Zirconium Content Pyridine Adsorption Surface Acid Site SiO2 Sample 

Notes

Acknowledgements

Financial support of this work by the Natural Science Foundation of China (NSFC, No.50772070) is gratefully acknowledged.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Yan Wang
    • 1
  • Jinghong Ma
    • 1
  • Dong Liang
    • 1
  • Meimei Zhou
    • 1
  • Fuxiang Li
    • 1
  • Ruifeng Li
    • 1
    Email author
  1. 1.Institute of Special ChemicalsTaiyuan University of TechnologyTaiyuanChina

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