Journal of Structural Chemistry

, Volume 52, Issue 2, pp 330–339

Phase formation in mixed TiO2-ZrO2 oxides prepared by sol-gel method

  • E. Kraleva
  • M. L. Saladino
  • R. Matassa
  • E. Caponetti
  • S. Enzo
  • A. Spojakina


Pure titania, zirconia, and mixed oxides (3–37 mol.% of ZrO2) are prepared using the sol-gel method and calcined at different temperatures. The calcined samples are characterized by Raman spectroscopy, X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption porosimetry. Measurements reveal a thermal stability of the titania anatase phase that slightly increases in the presence of 3–13 mol.% of zirconia. Practically, the titania anatase-rutile phase transformation is hindered during the temperature increase above 700°C. The mixed oxide with 37 mol.% of ZrO2 treated at 550°C shows a new single amorphous phase with a surface area of the nanoparticles double with respect to the other crystalline samples and the formed srilankite structure (at 700°C). The anatase phase is not observed in the sample containing 37 mol.% of ZrO2. The treatment at 700°C causes the formation of the srilankite (Ti0.63Zr0.37Ox) phase.


TiO2-ZrO2 mixed oxides sol-gel method srilankite Rietveld method 


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Copyright information

© Pleiades Publishing, Ltd. 2011

Authors and Affiliations

  • E. Kraleva
    • 1
  • M. L. Saladino
    • 2
  • R. Matassa
    • 3
  • E. Caponetti
    • 2
    • 3
  • S. Enzo
    • 4
  • A. Spojakina
    • 1
  1. 1.Institute of CatalysisBulgarian Academy of SciencesSofiaBulgaria
  2. 2.Dipartimento di Chimica “S. Cannizzaro,”Università di Palermo and INSTM-Udr PalermoPalermoItaly
  3. 3.Centro Grandi Apparecchiature-UniNetLabUniversità di PalermoPalermoItaly
  4. 4.Dipartimento di ChimicaUniversità di Sassari and INSTM-Udr SassariSassariItaly

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