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Journal of Materials Science

, Volume 43, Issue 6, pp 1979–1986 | Cite as

Comparison study on the size and phase control of nanocrystalline TiO2 in three Ti–Si oxide structures

  • Lu-Yan Wang
  • Yan-Ping Sun
  • Bing-She Xu
Article

Abstract

Three types of Ti–Si binary oxides have been prepared by sol-gel processes. The effects of SiO2 addition and annealing temperature on the grain size, phase transition, dispersion, and microstructure of nanocrystalline (nc) TiO2 anatase in the three Ti–Si oxide structures have been comparatively investigated by X-ray diffraction (XRD) analysis and high-resolution transmission electron microscopy (HRTEM). The grain growth and anatase-rutile transformation (ART) of ncTiO2 were found to depend not only on the SiO2 content and annealing temperature, but also on the composite structure. Both the grain growth and the ART of ncTiO2 proved to be significantly inhibited with increasing SiO2 content for all of the Ti–Si samples, but the structure of intimately mixed Ti–Si binary oxide showed the best inhibiting ability under high-temperature annealing. This result might be attributed to variations in the large lattice strains in ncTiO2, which were mainly induced by the substitution of Ti4+ by Si4+. Plausible mechanisms for the grain growth and ART of ncTiO2 are proposed. To inhibit the grain growth of ncTiO2, the addition of 10 and 30 mol% SiO2 proved to be optimal for Ti–Si samples annealed at 773 K and 1273 K, respectively.

Keywords

Lattice Strain SiO2 Content Pure TiO2 Increase Annealing Temperature TBOT 

Notes

Acknowledgements

Financial support from the Natural Science Foundation of China (grant numbers 20476067 and 90306014) is gratefully acknowledged. The authors would like to thank the staff of the Key Laboratory of Interfaces and Engineering in Advanced Materials and the Key Laboratory of Coal Science and Technology, for their help in performing the HRTEM and XRD measurements.

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.Chemical Engineering DepartmentTaiyuan University of TechnologyTaiyuanChina
  2. 2.Key Laboratory of Interface and Engineering in Advanced Material, Ministry of EducationTaiyuan University of TechnologyTaiyuanChina

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