The photocatalytic efficiency of supported TiO2 nanoparticles, immobilized onto supporting materials, namely silica and alumina fibers, was compared versus the performance of conventional TiO2 Degussa P25 catalyst. For this purpose the degradation of Methyl Red dye was used as evaluation test. The obtained results showed that the nanostructured supported catalyst has a similar performance of TiO2 Degussa P25 being the Methyl Red completely removed within 45 and 20 min, respectively. The kinetics of the investigated processes were monitored and a study on the reaction products and intermediates was carried out in order to evaluate possible difference in the reaction courses in presence of immobilized nanoparticles vs suspended catalyst. The results demonstrate that the mechanisms of parent dye degradation in presence of supported TiO2 nanoparticles are the same as those occurring in presence of TiO2 Degussa P25 catalyst.
Nanocrystalline TiO2 film on fibrous substrates as an efficient photocatalytic material for organics removal in water
LICCIULLI, ANTONIO ALESSANDRO;
2009-01-01
Abstract
The photocatalytic efficiency of supported TiO2 nanoparticles, immobilized onto supporting materials, namely silica and alumina fibers, was compared versus the performance of conventional TiO2 Degussa P25 catalyst. For this purpose the degradation of Methyl Red dye was used as evaluation test. The obtained results showed that the nanostructured supported catalyst has a similar performance of TiO2 Degussa P25 being the Methyl Red completely removed within 45 and 20 min, respectively. The kinetics of the investigated processes were monitored and a study on the reaction products and intermediates was carried out in order to evaluate possible difference in the reaction courses in presence of immobilized nanoparticles vs suspended catalyst. The results demonstrate that the mechanisms of parent dye degradation in presence of supported TiO2 nanoparticles are the same as those occurring in presence of TiO2 Degussa P25 catalyst.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
