Au-RE-TiO2 nanocomposites: surface characteristics and photoactivity
 
More details
Hide details
1
Gdansk University of Technology
2
University of Gdansk
CORRESPONDING AUTHOR
Adriana Zaleska   

Department of Environmental Engineering, University of Gdansk, 80-952 Gdansk, Poland
Publication date: 2014-01-06
 
Physicochem. Probl. Miner. Process. 2014;50(2):551–561
 
KEYWORDS
ABSTRACT
Photocatalysts based on TiO2 co-doped with rare earth metal (RE) and gold nanoparticles have been prepared using a sol-gel method and followed by gold reduction. Specific surface areas of the modified photocatalysts were calculated by the Brunauer-Emmett-Teller method (BET). Diffuse reflectance spectra of the obtained photocatalysts were recorded with a UV-Vis spectrophotometer (DRS UV-Vis). The influence of the type of rare earth metal on photoactivity of Au-RE-TiO2 nanocomposites in model reaction manifested by toluene photodegradation in a gas phase was investigated. The obtained results showed that photodegradation of toluene in the gas phase is possible over Au-RE-TiO2 irradiated by UV or Vis light. The Au-RE-TiO2 photocatalysts relative to undoped TiO2, did not caused an increase of toluene degradation in the air under visible light. The samples doped with Er3+ or Pr3+ presented the highest activity in solar light among of Au-RE-TiO2. It was observed that both metal dopants affected the surface area of TiO2. The Au-RE-TiO2 photocatalysts relative to undoped TiO2 exhibited the absorption properties under Vis light.
eISSN:2084-4735
ISSN:1643-1049