Comparison of the substrate dependent performance of Pt-, Au- and Ag-doped TiO2 photocatalysts in H2-production and in decomposition of various organics |
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Authors: | Károly Mogyorósi ákos Kmetykó Nóra Czirbus Gábor Veréb Pál Sipos and András Dombi |
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Institution: | (1) Department of Inorganic and Analytical Chemistry, Research Group for Environmental Chemistry, ReGECh, University of Szeged, PO Box 440, 6701 Szeged, Hungary; |
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Abstract: | Pt-, Au- and Ag-deposited Degussa P25 photocatalysts at 1% (m/m) noble metal loading] were prepared in which the noble metals
are most likely to be very finely dispersed on the surface of the TiO2 nanocrystals. Deposition of noble metals increased the photocatalytic efficiency (relative to the bare photocatalyst) in
the decomposition of oxalic- and formic acid, while decreased it in phenol containing systems. In H2-production, a very high quantum yield has been found for the Pt–TiO2 photocatalyst in the presence of oxalic and formic acids as sacrificial reagents, which opens the possibility for the economic
use of industrial side products (e.g., oxalic- and formic acid) for photocatalytic H2-production. |
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