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EnglishBoron (B)- and vanadium (V)-doped TiO2 photocatalysts were synthesized using modified sol-gel reaction processes and characterized by X-ray diffraction (XRD), Raman spectroscopy and N-2 physisorption (BET). The photocatalytic activities were evaluated by monitoring the degradation of methylene blue (MB). The results showed that the materials possess high surface area. The addition of B favored the transformation of anatase to rutile, while in the presence of V, anatase was the only phase detected. The MB degradation on V-doped TiO2 was significantly affected by the preparation method. In fact while the presence of V in the bulk did not influence strongly the photoreactivity under visible irradiation, an increase of surface V doping lead to improved photodegradation of MB. The degradation of MB dye indicated that the photocatalytic activities of TiO2 increased as the boron doping increased, with high conversion efficiency for 9 mol% B doping.
| Titolo: | Photocatalytic activity of TiO2 doped with boron and vanadium | |
| Autori: | ||
| Data di pubblicazione: | 2007 | |
| Rivista: | ||
| Abstract: | Boron (B)- and vanadium (V)-doped TiO2 photocatalysts were synthesized using modified sol-gel reaction processes and characterized by X-ray diffraction (XRD), Raman spectroscopy and N-2 physisorption (BET). The photocatalytic activities were evaluated by monitoring the degradation of methylene blue (MB). The results showed that the materials possess high surface area. The addition of B favored the transformation of anatase to rutile, while in the presence of V, anatase was the only phase detected. The MB degradation on V-doped TiO2 was significantly affected by the preparation method. In fact while the presence of V in the bulk did not influence strongly the photoreactivity under visible irradiation, an increase of surface V doping lead to improved photodegradation of MB. The degradation of MB dye indicated that the photocatalytic activities of TiO2 increased as the boron doping increased, with high conversion efficiency for 9 mol% B doping. | |
| Handle: | http://hdl.handle.net/11368/1694278 | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/J.JHAZMAT.2007.04.053 | |
| Appare nelle tipologie: | 1.1 Articolo in Rivista |
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