Nanocrystalline TiO2 with enhanced photoinduced charge separation as catalyst for the phenol degradation
Nanocrystalline TiO2 catalysts based on pure rutile (R100) and a 30% of anatase and 70% of rutile (R70) were synthesized by the sol-gel method, using Pluronic PE 6400 as templating agent. Catalysts were characterized in terms of structural and morphological properties; moreover, the formation of par...
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| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2006-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/IJP/2006/90809 |
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| Summary: | Nanocrystalline TiO2 catalysts based on pure rutile (R100) and
a 30% of anatase and 70% of rutile (R70) were synthesized by the
sol-gel method, using Pluronic PE 6400 as templating agent.
Catalysts were characterized in terms of structural and
morphological properties; moreover, the formation of paramagnetic
charge carriers under UV irradiation was studied and related to
the activity of TiO2 in the photoinduced degradation of phenol.
With respect to Degussa P25, the two sol-gel catalysts show lower
surface area and a wider pore size distribution. The EPR spectra
recorded under UV irradiation show enhanced charge separation in
the sol-gel samples, with the O− species in higher amount than
in Degussa P25. This result is in agreement with the high
catalytic activity of R100 sample in the photoinduced degradation
of phenol, very similar to that displayed by Degussa P25 and
higher than that of R70 sample. |
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| ISSN: | 1110-662X 1687-529X |