Au-RE-TiO2 nanocomposites. Surface characteristics and photoactivity

Anna Krukowska , Joanna Reszczyńska , Adriana Zaleska

Abstract

P hotocatalysts based on TiO 2 co - doped with rare earth metal (RE) and gold nanoparticles have been prepared using a sol - gel method and followed by gold reduction. S pecific 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 spectr ophotometer (DRS UV - Vis). The influence of the type of rare earth metal on photoactivity of Au - RE - TiO 2 nanocomposites in model reaction manifested by toluene photodegradation in a gas phase was investigated. The obtained results showed that photodegradatio n of toluene in the gas phase is possible over Au - RE - TiO 2 irradiated by UV or Vis light. The Au - RE - TiO 2 photocatalysts relative to undoped TiO 2 , did not caused an increase of toluene degradation in the air under visible light. The samples doped with Er 3+ o r Pr 3+ presented the highest activity in solar light among of Au - RE - TiO 2 . It was observed that both metal dopants affected the surface area of TiO 2 . The Au - RE - TiO 2 photocatalysts relative to undoped TiO 2 exhibited the absorption properties under Vis light
Author Anna Krukowska PFotokatalizy
Anna Krukowska ,,
- Laboratory of Photocatalysis
, Joanna Reszczyńska
Joanna Reszczyńska,,
-
, Adriana Zaleska PFotokatalizy
Adriana Zaleska,,
- Laboratory of Photocatalysis
Journal seriesPhysicochemical Problems of Mineral Processing, ISSN 1643-1049 [0137-1282]
Issue year2014
Vol50
No2
Pages551-561
Publication size in sheets0.5
Keywords in Englishphotocatalysis, modified TiO2, rare earth metal, Au nanoparticles, toluene degradation
DOIDOI:10.5277/ppmp140211
URL http://dx.doi.org/10.5277/ppmp140211
Languageen angielski
LicenseJournal (articles only); published final; Other open licence; with publication
Score (nominal)25
ScoreMinisterial score = 25.0, 20-12-2017, ArticleFromJournal
Ministerial score (2013-2016) = 25.0, 20-12-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2014 = 0.926 (2) - 2014=0.821 (5)
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