Figure 5 - available via license: CC BY
Content may be subject to copyright.
N 1s core-level spectra from monolithic and modulated TiO 2 :Cr,N coatings before and after FLA.

N 1s core-level spectra from monolithic and modulated TiO 2 :Cr,N coatings before and after FLA.

Source publication
Article
Full-text available
In this paper, we report on the phase selectivity in Cr and N co-doped TiO2 (TiO2:Cr,N) sputtered films by means of interface engineering. In particular, monolithic TiO2:Cr,N films produced by continuous growth conditions result in the formation of a mixed-phase oxide with dominant rutile character. On the contrary, modulated growth by starting wit...

Context in source publication

Context 1
... order to deepen in the evolution of N environments, XPS was performed in as-deposited and FLA samples. The N 1s core-level spectra for the different samples are shown in Figure 5. In line with the XANES, XPS of as-grown samples shows the dominance of interstitial sites (N-O), together with the presence of N 2 molecules (N-N). ...

Similar publications

Article
Full-text available
A series of Ca1-xCexZrTi2-2xCr2xO7 zirconolite ceramics (0 ≤ x ≤ 0.35) were reactively sintered in air at 1350 °C for 20 h. Single phase zirconolite-2 M was formed for x ≤ 0.15, with Cr2O3 and an undesirable Ce-bearing perovskite phase present above x = 0.20. Electron diffraction analysis confirmed that the zirconolite-2 M polytype was maintained o...
Article
Full-text available
The cell parameter evolution along the cubic U(Al1−xGex)3 solid solution shows a significant deviation from Vegard's law. The origin of such deviation has been investigated by X-ray powder and electron diffractions, EXAFS and HERFD XANES at the U L3 and Ge K edges and specific heat measurements. The results of such investigations show that, from th...
Preprint
Full-text available
Bridged μ-oxo iron bisporphyrins serve as photocatalysts for oxidative organic transformations, but suffer from low quantum efficiency. We use femtosecond optical and M2,3-edge XANES spectroscopy to investigate the early photodynamics of the μ-oxo iron bisporphyrin, (TPPFe)2O, providing evidence for the preferential formation of an TPPFe(III)+/TPPF...
Article
Full-text available
Continental shelves are important land–ocean interfaces where natural and anthropogenic processes as well as sediment geochemistry regulate organic matter sequestration. The major objective of this work is to understand spatial variability in reactive iron (rFe) bound organic carbon (OC) during low‐ and high‐flow conditions in the recent sediments...
Article
Full-text available
Four eyes see more than two: Operando EPR, XANES/EXAFS, ATR‐IR, and UV/Vis spectroscopy have been coupled in the same experiment to complete the mechanistic puzzle in selective aerobic alcohol oxidation by a copper‐TEMPO catalyst. The reaction is driven by a single CuI/CuII redox cycle that activates O2 with the help of TEMPO. Dimeric CuII–CuII spe...

Citations

... The paper "Phase Selectivity in Cr and N Co-Doped TiO 2 Films by Modulated Sputter Growth and Post-Deposition Flash-Lamp-Annealing" by Gago et al. presents how the interface engineering strategy can vary the phase occurrence in Cr and N co-doped TiO 2 (TiO 2 :Cr,N) sputter-deposited films [24]. A post-deposition flash-lamp-annealing (FLA) is also used to favor anatase phase, and to give rise to dopant activation and diffusion. ...
Article
Full-text available
This Special Issue contains a series of reviews and papers representing some recent results and some exciting perspectives focused on advanced strategies in thin films growth, thin films engineering by magnetron sputtering and related techniques. Innovative fundamental and applied research studies are then reported, emphasizing correlations between structuration process parameters, new ideas and approaches for thin films engineering and resulting properties of as-deposited coatings.
Article
The impact of Ta incorporation (up to ∼21 at.%) in titanium dioxide (TiO2) films subjected to post-deposition millisecond-range flash-lamp annealing (FLA) is addressed. Phase formation with short-range information was established by means of soft X-ray absorption near-edge structure (XANES) in combination with standard X-ray diffraction. As-grown films are X-ray amorphous, but display a significant structural improvement upon FLA. Up to relatively large Ta concentrations (∼ 12 at.%), FLA can be used to effectively incorporate Ta into a nanocrystalline anatase TiO2 phase, although its structural quality deteriorates progressively with the Ta content. For the intermediate Ta range between 12 and 17 at.%, the structure of the FLA films is highly disordered, being unable to overcome the initial distorted arrangement. In any case, rutile- or Ta2O5-like environments emerge for low and high contents, respectively. Finally, for the highest Ta content (∼21 at.%), the Ta2O5 phase is dominant with an increased quality after FLA. As assessed by XANES, the structural evolution upon FLA seems to be determined by the initial (amorphous) structure. Lastly, all the samples are highly transparent from the visible to the near-infrared region, and the band-gap can be tailored from ∼3.2 to ∼3.8 eV with increasing the amount of incorporated Ta.