Dependence of nitrogen doping on TiO2 precursor annealed under NH3 flow

Fang, Xiaoming; Zhang, Zhengguo; Chen, Qinglin; Ji, Hongbing; Gao, Xuenong

doi:10.1016/j.jssc.2007.02.010

Cited by 65 publications

(32 citation statements)

References 38 publications

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“…So, more photogenerated charge carriers can participate in organic compound degradation, resulting in the enhancement of photocatalytic activity. The presence of N might improve the migration and separation of photogenerated electrons and holes [41,42].…”

Section: Photocatalytic Activitiesmentioning

confidence: 99%

Nitrogen-doped TiO2 nanoparticles by using EDTA as nitrogen source and soft template: Simple preparation, mesoporous structure, and photocatalytic activity under visible light

Nassoko

Wang

et al. 2012

Journal of Alloys and Compounds

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Section: Photocatalytic Activitiesmentioning

confidence: 99%

Nitrogen-doped TiO2 nanoparticles by using EDTA as nitrogen source and soft template: Simple preparation, mesoporous structure, and photocatalytic activity under visible light

Nassoko

Wang

et al. 2012

Journal of Alloys and Compounds

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“…Different methods were applied to the N-TiO 2 fabrication: laser pyrolysis, 2 pulsed-laser deposition, 3 electrophoretic deposition, 4 plasma treatment, 5 annealing under gas atmosphere, [6][7][8] hydrothermal, 9 solvothermal, 10 mechanochemical, 11 spray pyrolysis, 12 wet 13,14 and sol-gel [15][16][17][18] methods, with addition of nitrogen-containing precursors (e.g. urea, ammonia) followed by calcination.…”

Section: Introductionmentioning

confidence: 99%

TiO2 doping by hydroxyurea at the nucleation stage: towards a new photocatalyst in the visible spectral range

Azouani¹,

Tieng²,

Chhor³

et al. 2010

Phys. Chem. Chem. Phys.

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We report an original method of preparation of OCN-doped TiO 2 for photocatalysis in the visible spectral range. The preparation is achieved by a sol-gel route using titanium tetraisopropoxide precursor. Special attention was paid to fluid micromixing, which enables homogeneous reaction conditions in the reactor bulk and monodispersity of the produced clusters/nanoparticles. The dopant hydroxyurea (HyU, CH 4 N 2 O 2 ) is injected into the reactive fluid at the nucleation stage, which lasts tens of milliseconds. The doping results in a strong yellow coloration of the nanocolloids due to the absorption band in the spectral range 380-550 nm and accelerates the aggregation kinetics of both nuclei at the induction stage and sub-nuclei units (clusters) at the nucleation stage. FTIR, Raman and UV-visible absorption analyses show the formation of a stable HyU-TiO 2 complex. EXAFS spectra indicate no appreciable changes of the first-shell Ti atom environment. The doping agent takes available surface sites of TiO 2 clusters/ nanoparticles attaining B10% molar loading. The reaction kinetics then accelerates due to a longer collisional lifetime between nanoparticles induced by the formation of a weak QOÁ Á ÁTi bond. The OCN-group bonding to titanium atoms produces a weakening of the CQO double bond and a strengthening of the C-N and N-O bonds.

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“…However, a N 1s peak centered at 396.3 eV was seen after NH 3 treatment, which corresponds to Ti N bond formation (Fig. 3(a and b)) [20,[30][31][32]. The Ti 2p XPS spectrum of TiO 2 in Fig.…”

Section: Characterization Of Bare and Modified Nanoparticles And Photmentioning

confidence: 99%

Superhydrophobic surfaces with photocatalytic activity under UV and visible light irradiation

et al. 2016

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Dependence of nitrogen doping on TiO2 precursor annealed under NH3 flow

Cited by 65 publications

References 38 publications

Nitrogen-doped TiO2 nanoparticles by using EDTA as nitrogen source and soft template: Simple preparation, mesoporous structure, and photocatalytic activity under visible light

Nitrogen-doped TiO2 nanoparticles by using EDTA as nitrogen source and soft template: Simple preparation, mesoporous structure, and photocatalytic activity under visible light

TiO2 doping by hydroxyurea at the nucleation stage: towards a new photocatalyst in the visible spectral range

Superhydrophobic surfaces with photocatalytic activity under UV and visible light irradiation

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