On the hydrophilicity of nitrogen-doped TiO2 thin films

Mardare, Diana; Luca, D.; Teodorescu, Cristian M.; Macovei, D.

doi:10.1016/j.susc.2007.04.156

Cited by 65 publications

(32 citation statements)

References 10 publications

(10 reference statements)

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“…To experimentally probe this hypothesis, TiO 2 deposition without N-doping via ALD was carried out based on the same experimental procedures, and the permeance between TiO 2 and N-TiO 2 , both having ≈20 nm deposition thicknesses, was compared (see the "Experimental Section;" Figure S7 wettability studies show that the N-doped TiO 2 membrane exhibits enhanced hydrophilicity as compared to the TiO 2 membrane (water contact angles for N-doped TiO 2 and TiO 2 membranes with the same deposition thickness of 20 nm are 22.9° ± 2.52° and 107.4° ± 0.82°, respectively) (see Video S1 Supporting Information), consistent with previous reports by using various fabrication routes. [12,17] Based on these macroscopic studies, we conjecture that nitrogen doping plays a vital role in chemically enhancing hydrophilicity, which facilitates water transport. Future studies will explore the relative role of surface properties including composition, charge, and morphology on the membrane performance.…”

Section: Doi: 101002/adsu201600041mentioning

confidence: 95%

Conformal Nitrogen‐Doped TiO₂ Photocatalytic Coatings for Sunlight‐Activated Membranes

Lee

Libera

Waldman

et al. 2017

Advanced Sustainable Systems

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Section: Doi: 101002/adsu201600041mentioning

confidence: 95%

Conformal Nitrogen‐Doped TiO₂ Photocatalytic Coatings for Sunlight‐Activated Membranes

Lee

Libera

Waldman

et al. 2017

Advanced Sustainable Systems

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“…Core-level spectra were fitted with Voigt lines and associated integrals of the Voigt profile, 37 each component with its own inelastic background associated with the inelastic scattering of photoelectrons on their way out of the sample. 38 In vitro biological testing of sputtered glass films in physiological fluids with various degrees of biomimicry…”

mentioning

confidence: 99%

Bioglass implant-coating interactions in synthetic physiological fluids with varying degrees of biomimicry

Popa¹,

Stan²,

Husanu³

et al. 2017

IJN

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Synthetic physiological fluids are currently used as a first in vitro bioactivity assessment for bone grafts. Our understanding about the interactions taking place at the fluid–implant interface has evolved remarkably during the last decade, and does not comply with the traditional International Organization for Standardization/final draft International Standard 23317 protocol in purely inorganic simulated body fluid. The advances in our knowledge point to the need of a true paradigm shift toward testing physiological fluids with enhanced biomimicry and a better understanding of the materials’ structure-dissolution behavior. This will contribute to “upgrade” our vision of entire cascades of events taking place at the implant surfaces upon immersion in the testing media or after implantation. Starting from an osteoinductive bioglass composition with the ability to alleviate the oxidative stress, thin bioglass films with different degrees of polymerization were deposited onto titanium substrates. Their biomineralization activity in simulated body fluid and in a series of new inorganic–organic media with increasing biomimicry that more closely simulated the human intercellular environment was compared. A comprehensive range of advanced characterization tools (scanning electron microscopy; grazing-incidence X-ray diffraction; Fourier-transform infrared, micro-Raman, energy-dispersive, X-ray photoelectron, and surface-enhanced laser desorption/ionization time-of-flight mass spectroscopies; and cytocompatibility assays using mesenchymal stem cells) were used. The information gathered is very useful to biologists, biophysicists, clinicians, and material scientists with special interest in teaching and research. By combining all the analyses, we propose herein a step forward toward establishing an improved unified protocol for testing the bioactivity of implant materials.

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“…For the other N-HP2 catalysts the N-doping does not affect the selectivity but the reaction rates decrease, suggesting that nitrogen in the bulk of titania acts as a recombination center for photogenerated e À h + pairs, thus decreasing the reaction rate. 27 The thermal treatment of the N-HP2-Urea sample determines the same pattern as that shown by the N-HP2-NH 4 Cl one. Indeed the highest MBA disappearance rate under visible irradiation is shown by the bare catalysts, i.e.…”

Section: Photoreactivitymentioning

confidence: 57%

Enhancing selectivity in photocatalytic formation of p-anisaldehyde in aqueous suspension under solar light irradiation via TiO2 N-doping

et al. 2012

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The photocatalytic partial oxidation of 4-methoxybenzyl alcohol to the corresponding aldehyde (p-anisaldehyde) was performed under simulated solar irradiation by using home prepared N-doped TiO 2 catalysts. The photocatalysts were prepared by a sol-gel method, using TiCl 4 as TiO 2 precursor and NH 4 Cl, urea or NH 4 OH as N-doping sources. A commercial TiO 2 (Degussa P25) was also used for comparison aims. The prepared catalysts were characterized by BET specific surface area, XRD, ESEM and UV-vis spectroscopy. The reactivity results show that (i) the doped catalysts are predominantly amorphous, and they show selectivity values far higher than those of the corresponding undoped ones and of well crystallized catalysts -even if the last ones show a higher activity -and (ii) exploitation of solar light significantly increases the reaction selectivity. In addition, different light sources were also used in order to investigate the effect of radiation wavelength ranges on the reactivity and selectivity to aldehyde.

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On the hydrophilicity of nitrogen-doped TiO2 thin films

Cited by 65 publications

References 10 publications

Conformal Nitrogen‐Doped TiO₂ Photocatalytic Coatings for Sunlight‐Activated Membranes

Conformal Nitrogen‐Doped TiO₂ Photocatalytic Coatings for Sunlight‐Activated Membranes

Bioglass implant-coating interactions in synthetic physiological fluids with varying degrees of biomimicry

Enhancing selectivity in photocatalytic formation of p-anisaldehyde in aqueous suspension under solar light irradiation via TiO2 N-doping

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On the hydrophilicity of nitrogen-doped TiO2 thin films

Cited by 65 publications

References 10 publications

Conformal Nitrogen‐Doped TiO2 Photocatalytic Coatings for Sunlight‐Activated Membranes

Conformal Nitrogen‐Doped TiO2 Photocatalytic Coatings for Sunlight‐Activated Membranes

Bioglass implant-coating interactions in synthetic physiological fluids with varying degrees of biomimicry

Enhancing selectivity in photocatalytic formation of p-anisaldehyde in aqueous suspension under solar light irradiation via TiO2 N-doping

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Conformal Nitrogen‐Doped TiO₂ Photocatalytic Coatings for Sunlight‐Activated Membranes

Conformal Nitrogen‐Doped TiO₂ Photocatalytic Coatings for Sunlight‐Activated Membranes