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Journal of Materials Science

, Volume 44, Issue 24, pp 6710–6716 | Cite as

Catalytic activity of Co/MCM-41 and Co/SBA-15 materials in toluene oxidation

  • Ágnes Szegedi
  • Margarita Popova
  • Christo Minchev
Mesostructured Materials

Abstract

Cobalt-containing MCM-41 and SBA-15 mesoporous materials were prepared by the pH-adjusting of the impregnation solution. The modified materials were investigated by X-ray diffraction, N2 physisorption, temperature-programmed reduction, DR UV–Vis diffuse reflectance, and FT-IR spectroscopy of adsorbed pyridine. The pH of the impregnation solution influences the surface charge of the mesoporous support and therefore determines the strength of interaction between the cobalt precursor and the mesoporous support. The formation of different cobalt oxide species in different ratios, depending on the pH of the impregnation solution, was established for both materials. The modified Co/MCM-41 and Co/SBA-15 materials were active in toluene oxidation. Their catalytic activity is predetermined by the nature, the reducibility, and the dispersion of the obtained cobalt oxide species.

Keywords

Co3O4 Impregnation Solution Silanol Group Cobalt Oxide Support Interaction 

Notes

Acknowledgements

Financial support by the Hungarian Research Fund (OTKA, Project No. F61972), by the project BУ-X-305/07 and the Bulgarian-Hungarian Inter-academic Exchange Agreement are greatly acknowledged. The authors thank to Dr. M. Dimitrov and Dr. N. Kostova for the N2 physisorption and DR UV–Vis measurements, respectively.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Ágnes Szegedi
    • 1
  • Margarita Popova
    • 2
  • Christo Minchev
    • 2
  1. 1.Institute of Nanochemistry and Catalysis, Chemical Research CenterHungarian Academy of SciencesBudapestHungary
  2. 2.Institute of Organic Chemistry with Center of PhytochemistryBulgarian Academy of SciencesSofiaBulgaria

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