Characterization and photocatalytic activity of rare earth metal-doped titanium dioxide
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Gdansk University of Technology
Institute of Fluid-flow Machinery, Polish Academy of Sciences
Adrianna Zaleska   

Department of Chemical Technology, Faculty of Chemistry, Gdansk University of Technology, Gdansk, Poland
Publication date: 2012-01-01
Physicochem. Probl. Miner. Process. 2012;48(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.