Optical and morphological properties of N-doped TiO2 thin films

Grigorov, K. G.; Oliveira, I. C.; Maciel, Homero Santiago; Massi, M.; Oliveira, Mauro Santos de; Amorim, J.; Cunha, C.A.

doi:10.1016/j.susc.2011.01.017

Cited by 42 publications

(21 citation statements)

References 17 publications

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“…Figure 4(d) shows the optical band gap of the films as a function of the annealing time. The optical band gap of the as-deposited TiN film and the film annealed for 120 minutes was estimated to be ∼1.58 and 3.23 eV, which is in agreement with previous reports for TiN, 35 and anatase TiO 2 , 36 respectively. It is seen that, by control of the annealing time, the optical band gap of the TiO 2 -TiN composite films can be varied in a range of 1.68 eV to 3.23 eV.…”

Section: Resultssupporting

confidence: 91%

Tuning the optical bandgap of TiO2-TiN composite films as photocatalyst in the visible light

Xie¹,

Liu²,

Zhan³

et al. 2013

AIP Advances

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TiO2-TiN composite catalysts were prepared by oxidizing the TiN films in air at 350 °C. By adjusting the oxidation time to control the oxidation stage of TiN films, the optical band gap of the TiO2-TiN composites can be varied in a wide range from 1.68 eV to 3.23 eV. These composite films all showed red shift in photo-response towards the visible region, and depending on the optical band gap, some composite films exhibited good catalytic activity in the visible light region. This study provides a simple but effective method to prepare film photocatalyst working in visible light

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Section: Resultssupporting

confidence: 91%

Tuning the optical bandgap of TiO2-TiN composite films as photocatalyst in the visible light

Xie¹,

Liu²,

Zhan³

et al. 2013

AIP Advances

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“…The values of E g have been estimated from this intercept. 43,44 As calculated, the band gap of the N-TiO 2 coating is 3.18 eV and that of the undoped TiO 2 coatings is 3.25 eV. This supports the proof that the NH 3 /Ar plasma treatment reduces the band gap of TiO 2 .…”

Section: ■ Results and Discussionsupporting

confidence: 75%

N-Doped TiO₂ Photocatalyst Coatings Synthesized by a Cold Atmospheric Plasma

et al. 2019

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This work presents a simple, fast (20 min treatment), inexpensive, and highly efficient method for synthesizing nitrogen-doped titanium dioxide (N-TiO 2 ) as an enhanced visible light photocatalyst. In this study, N-TiO 2 coatings were fabricated by atmospheric pressure dielectric barrier discharge (DBD) at room temperature. The composition and the chemical bonds of the TiO 2 and N-TiO 2 coatings were characterized by X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectroscopy (ToF-SIMS). The results indicate that the nitrogen element has doped the TiO 2 lattice, which was further confirmed by Raman spectroscopy and grazing incidence X-ray diffraction (GIXRD). The doping mechanism was investigated using OES to study the plasma properties under different conditions. It suggests that the NH radicals play a key role in doping TiO 2 . The concentration of nitrogen in the N-TiO 2 coatings can be controlled by changing the concentration of NH 3 in the plasma or the applied power to adjust the concentration of NH radicals in the plasma. The band gap of N-TiO 2 was reduced after NH 3 /Ar plasma treatment from 3.25 to 3.18 eV. Consequently, the N-TiO 2 coating showed enhanced photocatalytic activity under white-light-emitting-diode (LED) irradiation. The photocatalytic degradation rate for the N-TiO 2 coating was about 1.4 times higher than that of the undoped TiO 2 coating.

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“…On the other hand, the Tafel plots for Pt/TiN exhibited slopes that were steeper than the theoretical values and deviated from a straight line in the high current density region. The top surface of the TiN support nanoparticles is easy to change to hydrophilic TiO x N y [37], suggesting that generated water could flood the Pt/TiN catalyst surface, inhibiting the oxygen mass transport. However, the Tafel slopes for the Pt/TiN þ AB cathodes decreased with increasing AB content and approached that for Pt/GCB for values above 47 vol% (Fig.…”

Section: Eca and Pt Utilization Of Pt/tin þ Ab Cathodesmentioning

confidence: 99%

Performance of practical-sized membrane-electrode assemblies using titanium nitride-supported platinum catalysts mixed with acetylene black as the cathode catalyst layer

Shintani

Kakinuma

Uchida

et al. 2015

Journal of Power Sources

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Optical and morphological properties of N-doped TiO2 thin films

Cited by 42 publications

References 17 publications

Tuning the optical bandgap of TiO2-TiN composite films as photocatalyst in the visible light

Tuning the optical bandgap of TiO2-TiN composite films as photocatalyst in the visible light

N-Doped TiO₂ Photocatalyst Coatings Synthesized by a Cold Atmospheric Plasma

Performance of practical-sized membrane-electrode assemblies using titanium nitride-supported platinum catalysts mixed with acetylene black as the cathode catalyst layer

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Optical and morphological properties of N-doped TiO2 thin films

Cited by 42 publications

References 17 publications

Tuning the optical bandgap of TiO2-TiN composite films as photocatalyst in the visible light

Tuning the optical bandgap of TiO2-TiN composite films as photocatalyst in the visible light

N-Doped TiO2 Photocatalyst Coatings Synthesized by a Cold Atmospheric Plasma

Performance of practical-sized membrane-electrode assemblies using titanium nitride-supported platinum catalysts mixed with acetylene black as the cathode catalyst layer

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Product

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About

N-Doped TiO₂ Photocatalyst Coatings Synthesized by a Cold Atmospheric Plasma