Structural and textural characterization of sol-gel prepared nanoscale titanium-chromium mixed oxides

Abbas Khaleel, Ihsan Shehadi, Mariam Al-Shamisi

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Chromium-titanium mixed oxides with Cr/Ti+Cr molar ratio of 0.1, 0.2, 0.5, and 0.9 were prepared by a direct sol-gel method. The products were characterized by powder XRD, FT-IR spectroscopy, TEM, and N2 adsorption. Starting with 10% Cr3+, Cr/Ti+Cr=0.1, resulted in a complete dispersion of the Cr3+ ions in the titania matrix. On the other hand, a ratio of 0.2 resulted in the formation of traces of segregated α-Cr2O3, besides Cr-doped titania. At higher Cr contents, %Cr of ≥50, crystalline Ti-doped Cr2O3 and an amorphous Crdoped titania were obtained. Compared with the corresponding one-metal oxides, TiO2 and α-Cr2O3, the mixed oxides showed significantly modified textural properties presented in higher surface areas, larger porosities, and more homogeneous mesoporous structures. In addition, the incorporation of Cr3+ ions in the titania lattice enhanced the thermal stability of the anatase phase against transformation to rutile.

Original languageEnglish
Pages (from-to)1282-1287
Number of pages6
JournalJournal of Non-Crystalline Solids
Volume356
Issue number25-27
DOIs
Publication statusPublished - Jun 1 2010

Keywords

  • Doped titania
  • Mixed oxides
  • Nanoparticles
  • Sol-gel

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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