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

Eugenio Caponetti, Maria Luisa Saladino, Kraleva, Spojakina, Stefano Enzo

Risultato della ricerca: Article

11 Citazioni (Scopus)

Abstract

Pure titania, zirconia, and mixed oxides (3—37 mol.% of ZrO2) are prepared using the sol-gelmethod and calcined at different temperatures. The calcined samples are characterized by Ramanspectroscopy, X-ray powder diffraction, scanning electron microscopy, transmission electronmicroscopy, and nitrogen adsorption porosimetry. Measurements reveal a thermal stabilityof 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 temperatureincrease above 700 C. The mixed oxide with 37 mol.% of ZrO2 treated at 550 C shows a newsingle amorphous phase with a surface area of the nanoparticles double with respect to theother 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.
Lingua originaleEnglish
pagine (da-a)340-348
Numero di pagine9
RivistaJournal of Structural Chemistry
Volume52(2)
Stato di pubblicazionePublished - 2011

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anatase
Titanium dioxide
Oxides
Sol-gel process
Titanium
gels
mixed oxides
zirconium oxides
Zirconia
oxides
titanium
Sols
titanium oxides
rutile
X ray powder diffraction
phase transformations
Phase transitions
Nanoparticles
Crystalline materials
Nitrogen

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cita questo

Phase formation in mixed TiO2-ZrO2 oxides prepared by sol-gel method. / Caponetti, Eugenio; Saladino, Maria Luisa; Kraleva; Spojakina; Enzo, Stefano.

In: Journal of Structural Chemistry, Vol. 52(2), 2011, pag. 340-348.

Risultato della ricerca: Article

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abstract = "Pure titania, zirconia, and mixed oxides (3—37 mol.{\%} of ZrO2) are prepared using the sol-gelmethod and calcined at different temperatures. The calcined samples are characterized by Ramanspectroscopy, X-ray powder diffraction, scanning electron microscopy, transmission electronmicroscopy, and nitrogen adsorption porosimetry. Measurements reveal a thermal stabilityof 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 temperatureincrease above 700 C. The mixed oxide with 37 mol.{\%} of ZrO2 treated at 550 C shows a newsingle amorphous phase with a surface area of the nanoparticles double with respect to theother 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.",
author = "Eugenio Caponetti and Saladino, {Maria Luisa} and Kraleva and Spojakina and Stefano Enzo",
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TY - JOUR

T1 - Phase formation in mixed TiO2-ZrO2 oxides prepared by sol-gel method

AU - Caponetti, Eugenio

AU - Saladino, Maria Luisa

AU - Kraleva, null

AU - Spojakina, null

AU - Enzo, Stefano

PY - 2011

Y1 - 2011

N2 - Pure titania, zirconia, and mixed oxides (3—37 mol.% of ZrO2) are prepared using the sol-gelmethod and calcined at different temperatures. The calcined samples are characterized by Ramanspectroscopy, X-ray powder diffraction, scanning electron microscopy, transmission electronmicroscopy, and nitrogen adsorption porosimetry. Measurements reveal a thermal stabilityof 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 temperatureincrease above 700 C. The mixed oxide with 37 mol.% of ZrO2 treated at 550 C shows a newsingle amorphous phase with a surface area of the nanoparticles double with respect to theother 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.

AB - Pure titania, zirconia, and mixed oxides (3—37 mol.% of ZrO2) are prepared using the sol-gelmethod and calcined at different temperatures. The calcined samples are characterized by Ramanspectroscopy, X-ray powder diffraction, scanning electron microscopy, transmission electronmicroscopy, and nitrogen adsorption porosimetry. Measurements reveal a thermal stabilityof 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 temperatureincrease above 700 C. The mixed oxide with 37 mol.% of ZrO2 treated at 550 C shows a newsingle amorphous phase with a surface area of the nanoparticles double with respect to theother 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.

UR - http://hdl.handle.net/10447/54463

M3 - Article

VL - 52(2)

SP - 340

EP - 348

JO - Journal of Structural Chemistry

JF - Journal of Structural Chemistry

SN - 0022-4766

ER -