Controlled synthesis of nitrogen-doped binary and ternary TiO2 nanostructures with enhanced visible-light catalytic activity

Gai, Ligang; Mei, Qinghu; Duan, Xiuquan; Zhou, Guowei; Tian, Yan; Lu, Xifeng

doi:10.1016/j.jssc.2013.01.010

Cited by 15 publications

(10 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[5][6][7] Among these attempts, doping with nonmetallic ions, especially with N, is regarded as an effective approach. For N-doped TiO 2 , two preparation processes are widely employed: [12][13][14][15][16] annealing TiO 2 at a high temperature (generally over 600 8C) in the presence of nitrogen-containing precursors such as ammonia and urea; and annealing the hydrolyzates of titanium alkoxide precursors and nitrogen sources such as aliphatic amines, [17,18] NH 4 + , [19] N 2 H 4 , [20] and ammonia [8] at a certain temperature (generally higher than 450 8C). For N-doped TiO 2 , two preparation processes are widely employed: [12][13][14][15][16] annealing TiO 2 at a high temperature (generally over 600 8C) in the presence of nitrogen-containing precursors such as ammonia and urea; and annealing the hydrolyzates of titanium alkoxide precursors and nitrogen sources such as aliphatic amines, [17,18] NH 4 + , [19] N 2 H 4 , [20] and ammonia [8] at a certain temperature (generally higher than 450 8C).…”

Section: Introductionmentioning

confidence: 99%

“…[8] The number of published papers on N-doped TiO 2 has been increasing exponentially [3,4,[9][10][11] since the initial work was reported by R. Asahi et al [2] The properties of a catalyst usually depend on its synthetic process. For N-doped TiO 2 , two preparation processes are widely employed: [12][13][14][15][16] annealing TiO 2 at a high temperature (generally over 600 8C) in the presence of nitrogen-containing precursors such as ammonia and urea; and annealing the hydrolyzates of titanium alkoxide precursors and nitrogen sources such as aliphatic amines, [17,18] NH 4 + , [19] N 2 H 4 , [20] and ammonia [8] at a certain temperature (generally higher than 450 8C). It is clear that high-temperature treatment (over 450 8C) is required for both these synthetic methods.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Facile Synthesis of N‐doped TiO₂ and Its Enhanced Photocatalytic Activity for Degrading Colorless Pollutants

et al. 2014

View full text Add to dashboard Cite

N‐doped nanocrystalline TiO2 is synthesized successfully through a simple ammonia‐modified hydrolysis‐solvothermal process. It is demonstrated that the resulting TiO2 doped with an appropriate amount of N exhibits high visible photocatalytic activities for the degradation of gas‐phase acetaldehyde and liquid‐phase phenol, which is attributed to its increased visible adsorption, appropriate crystallinity, and good dispersibility, whereas its UV activity is decreased. On the basis of the atmosphere‐controlled surface photovoltage spectra, it is found that the doped N species can capture the photogenerated holes so as to be favorable for photogenerated charge separation, so it is suggested that its decreased UV activity results from its weak adsorption of O2 compared with that of undoped TiO2, as shown by the O2 temperature‐programed desorption curves. Interestingly, the photocatalytic activity of the resulting N‐doped TiO2 under visible or UV irradiation can be improved further by promoting O2 adsorption after modification with an appropriate amount of phosphoric acid.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of N‐doped TiO₂ and Its Enhanced Photocatalytic Activity for Degrading Colorless Pollutants

et al. 2014

View full text Add to dashboard Cite

show abstract

“…In the present study, we report the incorporation of Ti 3+ and nitrogen atoms into surfactanttemplated mesoporous TiO2 thin films by hydrazine treatment. All prior studies of Ti 3+ and N codoping by hydrazine treatment used TiO2 powders, nonporous films, nanowires or anodized nanotube arrays [1,5,6,28,39,40,[48][49][50][51][52][53][54]. We hypothesize that surfactant templated mesoporous TiO2 films have several advantages over TiO2 nanotubes.…”

Section: Introductionmentioning

confidence: 94%

Hydrazine-based synergistic Ti(III)/N doping of surfactant-templated TiO2 thin films for enhanced visible light photocatalysis

Islam

Rankin

2016

Materials Chemistry and Physics

View full text Add to dashboard Cite

This study reports the preparation of titanium (Ti 3+) and nitrogen co-doped cubic ordered mesoporous TiO2 thin films using N2H4 treatment. The resulting co-doped TiO2 (Ti 3+-N-TiO2) thin films show significant enhancements in visible light absorption and photocatalytic activity. Cubic ordered mesoporous TiO2 thin films were prepared via a sol-gel method with Pluronic F127 as the pore template. After brief calcination, the TiO2 films were dipped into hydrazine hydrate which acts both as a nitrogen source and as a reducing agent, followed by heating at low temperature (90 °C). The hydrazine treatment period was varied from 5-20 hours to obtain different degrees of reduction and nitrogen doping. X-ray photoelectron spectroscopy (XPS) analyses and UV-vis absorbance spectra of Ti 3+-N-TiO2 films indicate that the incorporated N atoms and Ti 3+ reduce the band gap of TiO2 and thus enhance the absorption of visible light. The corresponding visible light photocatalytic activity of Ti 3+-N-TiO2 films was determined from the photocatalytic degradation of methylene blue under visible light illumination (at 455 nm). The Ti 3+-N-TiO2 films prepared with 10 hours of treatment show the optimum photocatalytic activity, with a pseudo-first order rate coefficient of 0.12 h-1 , which is 3 times greater than that of undoped TiO2 films. Calcination temperature and time were varied prior to hydrazine treatment to confirm that a brief calcination at low temperature (10 min at 350 °C) gave the best photochemical activity. In photoelectrochemical water oxidation using a 455 nm LED, the Ti 3+-N-TiO2 films prepared with 10 hours of N2H4 treatment show about 4 times the photocurrent compared to undoped TiO2 films. The present study suggests that hydrazine induced doping is a promising approach to enable synergistic incorporation of N and Ti 3+ into the lattice of surfactant-templated TiO2 films and enhanced visible light photoactivity, but that the benefits are limited by gradual mesostructure deterioration.

show abstract

“…All N-doped TiO2 samples showed improved decolorization efficiency compared to undoped TiO2. Inhibition of recombination of photogenerated electron-hole pairs by nitrogen atoms enhanced the photocatalytic activity due to alteration of the electronic properties of TiO2 [32]. Among N-doped TiO2, N-TiO2(3) indicated the highest photocatalytic decolorization rate.…”

Section: Investigation Of Photocatalytic Efficiencymentioning

confidence: 99%

Decolorization of Reactive Black 5 Using N-Doped TiO2

Berktaş

Kartal

2022

Gazi University Journal of Science

View full text Add to dashboard Cite

Decolorization of Reactive Black 5 (RB5) was investigated by heterogeneous photocatalysis using N-doped TiO2. N-doped TiO2 photocatalysts were synthesized by means of a sol-gel process. X-ray diffraction performed the characterization of synthesized samples, scanning electron microscopy and X-ray photoelectron spectroscopy measurements. Photocatalytic activity of N-doped TiO2 samples was assessed by following decolorization and degradation efficiency of RB5. N-TiO2(3) sample yielded the highest decolorization efficiency. The apparent first-order rate constants for decolorization of RB5 with N-TiO2(X) samples followed the order of N-TiO2(3) > N-TiO2(2) > N-TiO2(4) > N-TiO2(1). Improvement of decolorization efficiency of TiO2 was observed doping with nitrogen. The effect of actual sunlight on decolorization efficiency was also investigated. 96% and 49% of decolorization efficiency levels were attained within 60 minutes of reaction time with outdoor sunlight and fluorescent daylight lamps, respectively.

show abstract

Controlled synthesis of nitrogen-doped binary and ternary TiO2 nanostructures with enhanced visible-light catalytic activity

Cited by 15 publications

References 67 publications

Facile Synthesis of N‐doped TiO₂ and Its Enhanced Photocatalytic Activity for Degrading Colorless Pollutants

Facile Synthesis of N‐doped TiO₂ and Its Enhanced Photocatalytic Activity for Degrading Colorless Pollutants

Hydrazine-based synergistic Ti(III)/N doping of surfactant-templated TiO2 thin films for enhanced visible light photocatalysis

Decolorization of Reactive Black 5 Using N-Doped TiO2

Contact Info

Product

Resources

About

Controlled synthesis of nitrogen-doped binary and ternary TiO2 nanostructures with enhanced visible-light catalytic activity

Cited by 15 publications

References 67 publications

Facile Synthesis of N‐doped TiO2 and Its Enhanced Photocatalytic Activity for Degrading Colorless Pollutants

Facile Synthesis of N‐doped TiO2 and Its Enhanced Photocatalytic Activity for Degrading Colorless Pollutants

Hydrazine-based synergistic Ti(III)/N doping of surfactant-templated TiO2 thin films for enhanced visible light photocatalysis

Decolorization of Reactive Black 5 Using N-Doped TiO2

Contact Info

Product

Resources

About

Facile Synthesis of N‐doped TiO₂ and Its Enhanced Photocatalytic Activity for Degrading Colorless Pollutants

Facile Synthesis of N‐doped TiO₂ and Its Enhanced Photocatalytic Activity for Degrading Colorless Pollutants