FT-IR SPECTROSCOPY STUDY OF THE TiO2 BASED POWDERS PREPARED BY THE SOL-GEL METHOD
Adriana Rusu, Luminița Predoană, Silviu Preda, Daniela C. Culiţă, M. Zaharescu
Abstract
In the present paper the results regarding the preparation by sol-gel method of the pristine and TiO2 nanoparticles doped with Ce, Sn, Cu or Zn is presented. The as-prepared samples and the crystallized powders were investigated by Fourier transmission infrared spectroscopy (FT-IR). The FTIR investigations are of great interest, especially for the amorphous asprepared samples. In the cases of the studied samples, the FT-IR results obtained in both cases (amorphous and crystallized powders) have confirmed the interaction between TiO2 and the different dopants. In the case of the asprepared samples, the incorporation of the dopants in the TiO2 structure is put in evidence by displacement of the Ti-O vibration to higher values of wavelength. The FT-IR results of the crystalized samples were confirmed by the XRD diffraction. The presence of the dopant in the TiO2 structure was also confirmed by their influence on the photocatalytic investigations.