| Autor: |
Marschall R; Laboratory of Industrial Chemistry, Ruhr-University Bochum, Universitaetsstrasse 150, 44801 Bochum, Germany. roland.marschall@techem.rub.de, Soldat J, Busser GW, Wark M |
| Jazyk: |
angličtina |
| Zdroj: |
Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology [Photochem Photobiol Sci] 2013 Apr; Vol. 12 (4), pp. 671-7. |
| DOI: |
10.1039/c2pp25200g |
| Abstrakt: |
(111)-layered Ba5Ta4O15 photocatalysts were synthesised by a solid state reaction route and a citrate synthesis route, and their structural and electronic properties were investigated. After citrate route preparation, the presence of a second phase, namely Ba3Ta5O15, was determined by X-ray powder diffraction and absorption spectroscopy. The existence of this phase had a profound effect on the photocatalytic activity of this Ba5Ta4O15/Ba3Ta5O15 composite in comparison to the pure Ba5Ta4O15 materials. The photocatalytic performance of the barium tantalates was evaluated by investigating the capability in ˙OH radical formation and hydrogen generation. Strongly increased hydrogen evolution rates for the Ba5Ta4O15/Ba3Ta5O15 composite, up to 160% higher than for the pure Ba5Ta4O15, were determined, and only very small amounts of Rh co-catalyst, deposited on the photocatalysts by stepwise reductive photo-deposition, were needed to achieve these results. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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