Photocatalytic activity of TiO₂ doped with boron and vanadium

详细信息	查看全文 | 推荐本文 |

• 作者：M. Bettinelli ; V. Dallacasa ; D. Falcomer ; P. Fornasiero ; V. Gombac ; T. Montini ; L. Romanò ; ; A. Speghini
• 关键词：TiO₂ ; Doping ; Methylene blue photodegradation ; Boron ; Vanadium
• 刊名：Journal of Hazardous Materials
• 出版年：2007
• 期刊代码：50_03043894
• 类别：ce
• 出版时间：31 July 2007
• 卷：146
• 期：3
• 页码：529-534
• 文件大小：346 K

摘要

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 N₂ 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.