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Journal of Materials Science

, Volume 45, Issue 4, pp 1117–1122 | Cite as

Direct synthesis and characterization of LaSBA-15 mesoporous molecular sieves

  • Geraldo E. LuzJr.Email author
  • Stevie H. Lima
  • Ana C. R. Melo
  • Antonio S. Araujo
  • Valter J. FernandesJr.
Article

Abstract

Lanthanum-incorporated SBA-15 mesoporous molecular sieves were synthesized in a two-stage hydrothermal procedure from a precursor solution containing lanthanum chloride. The products were characterized by powder X-ray diffraction, thermogravimetric analysis, X-ray fluorescence, and nitrogen porosimetry. Taken together, the analyses indicated that the products formed highly ordered mesostructures with large average pore sizes, and suggested that the lanthanum was incorporated in the SBA-15 both into the framework as well as within the mesopores. Catalytic dehydration of ethanol over the LaSBA-15 products shows that they have weak Lewis acid and basic functionalities, indicative of the presence of lanthanum oxide in these samples.

Keywords

Lanthanum Average Pore Size Mesoporous Molecular Sieve Lanthanum Oxide Acetaldehyde Selectivity 

Notes

Acknowledgements

The authors would like to thank the FAPEPI and UESPI for the award of scholarship, the support from the PETROBRAS, ANP, FINEP, and CNPq, and the Institutional X-ray Diffraction Laboratory—UFRN.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Geraldo E. LuzJr.
    • 1
    Email author
  • Stevie H. Lima
    • 1
  • Ana C. R. Melo
    • 1
  • Antonio S. Araujo
    • 1
  • Valter J. FernandesJr.
    • 1
  1. 1.Laboratory of Catalysis and Petrochemical, Department of Chemistry, Nature Science CenterFederal University of Rio Grande do NorteNatalUSA

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