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2012 | 121 | 1 | 208-210
Article title

The Influence of the Au Nanoparticles Dimension on the Photocatalytic Performances of TiO_2-Au Porous Composites

Content
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EN
Abstracts
EN
The influence of Au nanoparticles dimension on the photocatalytic performances of the TiO_2 aerogels-Au composites was evaluated. Structural and morphological peculiarities of the TiO_2 aerogel, unloaded and loaded with 5 and 22 nm Au nanoparticles, were studied by transmission electron microscopy technique, X-ray diffraction and N_2-sorption measurements. UV-Vis diffuse reflectance measurements were performed to determine the band gap energies. The photocatalytic activity was evaluated by monitoring the salicylic acid photodegradation. It was found that the Au nanoparticles promote the anatase phase crystallization and produce the decrease of the specific surface area and band gap energy values. The porous composite with the smallest Au nanoparticles dimension exhibits the best photocatalytic performances.
Keywords
Contributors
author
  • Faculty of Physics, Babes-Bolyai University, M. Kogalniceanu 1, 400084 Cluj-Napoca, Romania
author
  • Faculty of Physics, Babes-Bolyai University, M. Kogalniceanu 1, 400084 Cluj-Napoca, Romania
author
  • Faculty of Physics, Babes-Bolyai University, M. Kogalniceanu 1, 400084 Cluj-Napoca, Romania
author
  • Faculty of Physics, Babes-Bolyai University, M. Kogalniceanu 1, 400084 Cluj-Napoca, Romania
author
  • Faculty of Physics, Babes-Bolyai University, M. Kogalniceanu 1, 400084 Cluj-Napoca, Romania
  • National Institute of Materials Physics, Atomistilor 105 bis, P.O. Box MG. 7, 77125 Bucharest, Romania
author
  • National Institute of Materials Physics, Atomistilor 105 bis, P.O. Box MG. 7, 77125 Bucharest, Romania
author
  • Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, A. Janos 11, 400028 Cluj-Napoca, Romania
  • Faculty of Biology and Geology, Babes-Bolyai University, Clinicilor 5-7, 400006 Cluj-Napoca, Romania
author
  • Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, A. Janos 11, 400028 Cluj-Napoca, Romania
author
  • Faculty of Physics, Babes-Bolyai University, M. Kogalniceanu 1, 400084 Cluj-Napoca, Romania
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv121n164kz
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