Preparation and Characterization of Nitrogen-Doped Titanium Dioxide

Abstract

To extend the absorption range of titanium dioxide into the visible-light region, the nitrogen incorporation process is investigated. This work presents a simple procedure for preparing nitrogen doped titanium dioxide nanocrystal (TiOxNy) by calcinating the mixture of Degussa P-25 (DP-25) TiO2 and NH4Cl at temperatures between 350 and 500 degrees C under airtight condition. Analysis of X-ray photoelectron spectroscopy indicated the molecular state nitrogen was incorporated into TiO2 lattice leading to the observable shift of the absorption edge to longer wavelength region with higher absorption intensity. These TiOxNy samples exhibit photocatalytic activity for methylene blue decomposition in aqueous solution under visible light irradiation. The correlation between the photocatalytic activity of TiOxNy and nitrogen content, rutile phase composition, and surface area was investigated and discussed.

Liquid-phase non-thermal plasma-prepared N-doped TiO2 for azo dye degradation with the catalyst separation system by ceramic membranes

“…Among the viable doping elements or compounds for TiO 2 , the substitutional doping of nitrogen has been recognized to be one of the doi: 10.2166/wst.2010.334 most effective means for producing visible light irradiation effect Hsu et al 2007). A number of researches have doped nitrogen into TiO 2 using different preparation methods and N-doped precursors.…”

Preparation and Characterization of Nanocrystalline Fe/N Co-Doped Titania

“…The transformation of anatase to rutile phase was thus depressed under the existence of Fe-dopant. [15]. The red shift of absorption edge in Fe-doped TiO 2 has been attributed to the charge-transfer transition between the Fe 3+ d electrons and the TiO 2 conduction or valence band [27].…”

“…Preparation and investigation of nitrogen-doped TiO 2 has been reported previously [15]. As a continuous work, we present the results for preparing and detailed characterization of Fe/N-TiO 2 nanocrystalline which shows the significant red shift in absorption edge and the promising potential in future photocatalytic application.…”