Resumo

MALDONADO, C et al. PHOTOCATALYTIC DEGRADATION OF TRICHLOROETHYLENE OVER SILVER NANOPARTICLES SUPPORTED ON TIO₂. J. Chil. Chem. Soc. [online]. 2010, vol.55, n.3, pp.404-407. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072010000300029.

The photocatalytic degradation of trichloroethylene over Ag nanoparticles supported on TiO₂ was studied. The photocatalysts were obtained by impregnation of Ag colloids on TiO₂. They were characterized by XPS, TEM and UV-vis. Ag° nanoparticles were obtained with diameters between 2.0-3.2 nm. The photocatalysts were found to display band gap energies similar to those of pure TiO₂, although the presence of Ag nanoparticles results in the formation of a plasmon resonance band in the visible range. The photocatalytic activity of the Ag/TiO₂ samples to remove trichlorethylene (TCE) in gas phase was tested. With visible light, up to 60% of conversion was obtained.

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