Effect of nitrogen doping on anatase–rutile phase transformation of TiO2

Photocatalytic activity of N-doped anatase grown in the grain boundaries of dense TiN1−X bulks by oxidation with H2O2

“…5(b) confirms the existence of anatase in samples treated at 450 • C. Wu substitution of nitrogen on the oxygen sublattice is possible. This solubility is enhanced due to the fcc-structure of TiN 1−X [24] which can also promotes the crystallization of anatase after oxidation by H 2 O 2 [6]. From this characterization by XRD and Raman Spectroscopy we can confirm the existence of anatase on the surface of both series of TiN 1−X samples with and without thermal treatment.…”

“…Among different elements, nitrogen and sulfur showed an improvement over the activation of TiO 2 under visible and UV light [5]. In addition, it has been reported that nitrogen doping had a certain effect on the phase transformation of TiO 2 increasing the transformation temperature from anatase to rutile [6]. Nitrogen doping can be achieved by nitridation of TiO 2 in ammonia atmosphere at high temperatures [7,8], by solvothermal process [9,10], by oxidation of titanium nitride (TiN) [11,12] and so on.…”

Comparative study of (N, Fe) doped TiO2 photocatalysts

“…1c). This result should be correlated to the decomposition process of urea, which takes place in a range of temperatures around 150-210 • C [21], and also probably to the occurrence of dehydroxylation processes [22].…”

The Synergistic Effect of Nitrogen Dopant and Calcination Temperature on the Visible-Light-Induced Photoactivity of N-Doped TiO2

“…It only uses 4-5% of the UV light in the solar irradiation. To utilize solar energy effectively, many attempts have been made to modify the properties of TiO 2 , such as doping with transition metal ions [12][13][14] or nonmetal anions [3,[15][16][17][18][19][20][21][22][23], and sensitization with organic dyes [24,25]. Among the nonmetal-doping TiO 2 photocatalysts, the simplest and most feasible TiO 2 modification approaches for achieving visible-light-driven photocatalysis seem to be N-doping, that is, doping nitrogen atoms into interstitial (or substitutional) sites in the crystal structure of TiO 2 .…”