Characterization and catalytic properties of nano-sized Pt metal catalyst on TiO2-SiO2 synthesized by photo-assisted deposition and impregnation methods
✍ Scribed by R.M. Mohamed
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 630 KB
- Volume
- 209
- Category
- Article
- ISSN
- 0924-0136
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✦ Synopsis
The photo-assisted deposition (PAD) and impregnation (img) syntheses of nano-sized Pt metal on TiO 2 -SiO 2 are reported. The prepared catalysts were characterized by different techniques such as XRD, XAFS, TEM and nitrogen adsorption analysis. Photocatalytic reactivity using Pt-TiO 2 -SiO 2 catalysts under visible-light condition for the oxidation of 2-propanol was evaluated. The results showed a notable photocatalytic activity of PAD-Pt-TiO 2 -SiO 2 which was 1.5 and 4.7 times higher than that of imp-Pt-TiO 2 -SiO 2 and TiO 2 -SiO 2 , respectively. Furthermore, PAD-Pt-TiO 2 -SiO 2 catalysts exhibit a better catalytic property for hydrogenation of nitrobenzene, compared to the catalysts prepared by impregnation method.