Studies on the Microstructure of Pure and Doped Anatase TiO₂ Nanoparticles by SAXS

Abstract:

Pure TiO₂, Ce-doped and Ce/Si-codoped TiO₂ nanoparticles with different Ce contents were synthesized by using a sol-gel-hydrothermal method. The as-synthesized samples were annealed at 400 °C. Their crystallization was investigated by Raman spectroscope. The result showed that Ce-doping and Ce-Si codoping decreased the crystallization. The interfacial and fractal properties were investigated by synchrotron radiation small angle X-ray scattering (SAXS). The results indicated that Ce-doping induced the Porod negative deviation, and the fractal properties showed TiO₂ nanoparticles codoped by Ce-Si were rougher than these of the pure TiO₂ and Ce-doped TiO₂. This rough surface of the nanoparticles was helpful to improve the photocatalytic activity.

• Periodical: Materials Science Forum (Volumes 743-744)
• Pages: 831-836
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.743-744.831
• Online since: January 2013
• Authors: Wei Mei Shi, Xiao Jun Dai, Guang Cheng Yang, Yao Xu, Yi Liu
• Keywords: Raman Spectra, Small Angle X-Ray Scattering, TiO₂ Nanoparticles

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