Great Enhancement of Photocatalytic Activity of Nitrogen-Doped Titania by Coupling with Tungsten Oxide
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- 作者：Bifen Gao ; Ying Ma ; Yaan Cao ; Wensheng Yang ; Jiannian Yao
- 刊名：Journal of Physical Chemistry B
- 出版年：2006
- 出版时间：July 27, 2006
- 年：2006
- 卷：110
- 期：29
- 页码：14391 - 14397
- 全文大小：409K
- 年卷期：v.110,no.29(July 27, 2006)
- ISSN：1520-5207
文摘
The TiO2-N-x%WO3 composite photocatalysts were prepared by introducing WO3 into nitrogen-doped TiO2.The composite catalysts present much higher photocatalytic activity than TiO2 and nitrogen-doped TiO2 underboth ultraviolet and visible light irradiation. Diffuse reflectance UV-vis spectra, XPS analysis, and IR spectrashow that the coordinated nitrogen species (or N-metal-O linkages) may contribute to the visible lightphotocatalytic activity. WO3 coupling increases the active nitrogen species and thus enhances the visiblelight activity of the composite photocatalysts. The superior activity of TiO2-N-x%WO3 compositephotocatalysts upon UV light irradiation can be rationalized in terms of efficient charge separation and highadsorption affinity of WO3.