Low temperature RF plasma nitriding of self-organized TiO2 nanotubes for effective bandgap reduction

Bonelli, Thiago Scremin; Pereyra, I.

doi:10.1016/j.apsusc.2018.02.153

Cited by 5 publications

(7 citation statements)

References 32 publications

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“…Deposition of anodized titanium foils (80 V for 10 min) and thin films (80 V for 55 s) on glass micro-scope slides using radiofrequency magnetron furnished self-organized TiO 2 nanotubes at 25°C. 35 Argon gas was used for sputtering TiO 2 thin films over different substrates at room temperature. As for the rutile preparation, a piece of Cu (99.99%) rod with 1 mm width was placed symmetrically on target.…”

Section: Rf Sputteringmentioning

confidence: 99%

“…34 Uniform TiO 2 nanotubes (diameter: 130 ± 8 nm, length: 13 ± 0.1 nm) were formed using Ti foils anodization at room temperature, 80 V and 10 min as shown in Figure 14c. 35 Aqueous solutions of titanium tetrafluoride were used to prepare anatase nanotubes with straight channels (diameter: 50-150 nm) at 60°C using alumina membranes. Nanotube walls had pores of 10 nm size.…”

Section: -Dimensional (1d)mentioning

confidence: 99%

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Recent advances in ultra-low temperature (sub-zero to 100 °C) synthesis, mechanism and applications of titania (TiO₂) nanoparticles

et al. 2021

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Section: Rf Sputteringmentioning

confidence: 99%

Section: -Dimensional (1d)mentioning

confidence: 99%

Recent advances in ultra-low temperature (sub-zero to 100 °C) synthesis, mechanism and applications of titania (TiO₂) nanoparticles

et al. 2021

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“…The choose of these nitriding parameters were due to previously work of the group, which determined the processes parameters to nitriding TiO2 nanotubes effetely reducing the bandgap without surface corrosion by plasma nor generating morphology changes [33].…”

Section: B Nitriding Tio2 Nanotubesmentioning

confidence: 99%

“…In this work, the integration of nitrided TiO2 nanotubes arrays, produced by Ti thin films on microscope slides anodization followed by Nitrogen plasma treatment, with reduced gap of 2.80 eV, [33] and PDMS microchannels into a microfluidic photocatalytic device is proposed. The performance of the fabricated microfluidic system and the photocatalytic efficiency of the proposed devices were evaluated by UV-Vis measurements of methylene blue (MB) reduction.…”

Section: Introductionmentioning

confidence: 99%

A Microfluidic Device Based on Plasma Nitrided Self-Organized TiO2 Nanotubes for Photocatalytic Reduction Study

Bonelli

Pereyra

2018

JICS

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Nitrided TiO2 nanotubes and PDMS microchannel were assembled in a photocatalytic device for organic dyes photo-degradation studies. By integrating a PDMS microchannel with the nitrided TiO2 nanotubes array, a microfluidic photocatalytic device was obtained and characterized by morphological, chemical, and physical points of view. The fabrication process allows an easy integration of the obtained nitrided TiO2 nanotubes with a microchannel into a microfluidic device for pollutant photo-degradation. The high surface-to-volume ratio intrinsic of nanotubes structures has functional properties for harvesting light and is responsible for part of the interesting photocatalytic device performance. Another great advantage of nitrided TiO2 nanotubes compared to just TiO2 nanotubes, is the lower gap of 2.80 eV achieved by plasma nitriding processes in PECVD reactor, which leads to a 14% increase in the photocatalytic response to sun light. As a consequence, the methylene blue reduction efficiency of the microfluidic device fabricated with nitrided TiO2 nanotubes increased 13% compared to that with just anodized TiO2 nanotubes.

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“…Low temperature plasma can cause defects and oxygen vacancies on the catalyst surface to improve the catalytic efficiency [42,43,44]. The effect of treating the catalyst with low temperature plasma under different atmospheres is different.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Degradation of Organic Dyes via Defect-Rich TiO2 Prepared by Dielectric Barrier Discharge Plasma

Wang

et al. 2019

Nanomaterials

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The dye wastewater produced in the printing and dyeing industry causes serious harm to the natural environment. TiO2 usually shows photocatalytic degradation of dye under the irradiation ultravilet light rather than visible light. In this work, a large number of oxygen vacancies and Ti3+ defects were generated on the surface of the TiO2 nanoparticles via Ar plasma. Compared with pristine TiO2 nanoparticles, the as-obtained Ar plasma-treated TiO2 (Ar-TiO2) nanoparticles make the energy band gap reduce from 3.21 eV to 3.17 eV and exhibit enhanced photocatalytic degradation of organic dyes. The Ar-TiO2 obtained exhibited excellent degradation properties of methyl orange (MO); the degradation rate under sunlight irradiation was 99.6% in 30 min, and the photocatalytic performance was about twice that of the original TiO2 nanoparticles (49%). The degradation rate under visible light (λ > 400 nm) irradiation was 89% in 150 min, and the photocatalytic performance of the Ar-TiO2 was approaching ~4 times higher than that of the original TiO2 nanoparticles (23%). Ar-TiO2 also showed good degradation performance in degrading rhodamine B (Rho B) and methylene blue (MB). We believe that this plasma strategy provides a new method for improving the photocatalytic activity of other metal oxides.

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Low temperature RF plasma nitriding of self-organized TiO2 nanotubes for effective bandgap reduction

Cited by 5 publications

References 32 publications

Recent advances in ultra-low temperature (sub-zero to 100 °C) synthesis, mechanism and applications of titania (TiO₂) nanoparticles

Recent advances in ultra-low temperature (sub-zero to 100 °C) synthesis, mechanism and applications of titania (TiO₂) nanoparticles

A Microfluidic Device Based on Plasma Nitrided Self-Organized TiO2 Nanotubes for Photocatalytic Reduction Study

Enhanced Photocatalytic Degradation of Organic Dyes via Defect-Rich TiO2 Prepared by Dielectric Barrier Discharge Plasma

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Low temperature RF plasma nitriding of self-organized TiO2 nanotubes for effective bandgap reduction

Cited by 5 publications

References 32 publications

Recent advances in ultra-low temperature (sub-zero to 100 °C) synthesis, mechanism and applications of titania (TiO2) nanoparticles

Recent advances in ultra-low temperature (sub-zero to 100 °C) synthesis, mechanism and applications of titania (TiO2) nanoparticles

A Microfluidic Device Based on Plasma Nitrided Self-Organized TiO2 Nanotubes for Photocatalytic Reduction Study

Enhanced Photocatalytic Degradation of Organic Dyes via Defect-Rich TiO2 Prepared by Dielectric Barrier Discharge Plasma

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Recent advances in ultra-low temperature (sub-zero to 100 °C) synthesis, mechanism and applications of titania (TiO₂) nanoparticles

Recent advances in ultra-low temperature (sub-zero to 100 °C) synthesis, mechanism and applications of titania (TiO₂) nanoparticles