Question

Great enhancement of photocatalytic activity of nitrogen-doped titania by coupling with tungsten oxide

Answer 1

a Marine integrates of phylum echinodermata such as starfish is a sea cucumber

Answer 2

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 under both ultraviolet and visible light irradiation. Diffuse reflectance UV−vis spectra, XPS analysis, and IR spectra show that the coordinated nitrogen species (or N−metal−O linkages) may contribute to the visible light photocatalytic activity. WO3coupling increases the active nitrogen species and thus enhances the visible light activity of the composite photocatalysts. The superior activity of TiO2−N−x%WO3 composite photocatalysts upon UV light irradiation can be rationalized in terms of efficient charge separation and high adsorption affinity of WO3.