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1 Physicochemical Problems of Mineral Processing

1 2012

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Characterization And Photocatalytic Activity Of Rare Earth Metal-Doped Titanium Dioxide

Reszczynska J., Iwulska A., Sliwinski G., Zaleska A.

Physicochemical Problems of Mineral Processing

2012

Vol. 48, iss. 1

201-208

The aim of this research was to prepare rare metal (Er, Yb)-modified TiO2 nanoparticles by a sol-gel method. The obtained nanoparticles were characterized by BET measurements, UV-Vis spectra and the Laser-induced fluorescence (LIF) method. Visible light photocatalytic activity of the sample was studied by photodegradation of phenol while considering the influence of the dopant concentration. The obtained results showed that a smaller amount of the dopant gave better photocatalytic activity of a semiconductor. The absorption spectra of Yb3+-doped and Er3+-TiO2 samples show stronger absorption in the UV-Vis region than pure TiO2. The presence of erbium was found more beneficial for visible light activation of TiO2 doped photocatalysts than ytterbium.