Photocatalytic properties of TiO2 modified with platinum and silver nanoparticles in the degradation of oxalic acid in aqueous solution
作者： V. Iliev , D. Tomova , L. Bilyarska , A. Eliyas , L. Petrov
DOI: 10.1016/J.APCATB.2005.10.014
关键词:
摘要: Abstract The commercially available TiO2-catalyst (Degussa P25) was modified with nanosized platinum and silver particles by the photoreduction method to obtain different noble metal loading (0.5 1 wt.%). characterization of synthesized catalysts carried out BET method, XPS, TEM adsorption model pollutant. degradation oxalic acid has been studied in aqueous solution photocatalyzed band-gap-irradiated TiO2, or particles. photocatalytic activity metal, is approximately double that semiconducting support. properties catalysts, as well content on surface support, influence efficiency process. reaction rate follows a zero kinetic order according Langmuir–Hinshelwood model. increase quantum yield photodestruction pollutant due formation Schottky barriers metal–semiconductor interface, which serve efficient electron traps, preventing electron–hole recombination.
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