Synthesis of N-TiO2 Effect of the Concentration of Nitrogen in the Band Gap

Pérez, Emilio; Torres, Mónica Farfán; Morales, Graciela V; Murgia, V.; Sham, Edgardo Ling

doi:10.1016/j.mspro.2015.04.121

Cited by 21 publications

(20 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The increase of ratios until 1:2 promoted a decrease on the band gap from 3.19 to 2.51 eV. However, for the molar ratio of 1:1, two different absorption edges appear, where the first corresponds to the undoped fraction, and the second one corresponds to the presence of N onto TiO 2 [69]. In fact, Chainorong et al [70] also identified both UV-Vis absorption edges for N-TiO 2 prepared by the hydrothermal method.…”

Section: Effect Of Nitrogen Incorporationmentioning

confidence: 96%

“…Moreover, the effect of the addition of different Ti:N ratios can influence the catalyst absorption capacity under visible light and decrease the band gap energy as a consequence. Pérez et al [69] for the N-TiO 2 prepared by the sol-gel method showed that the increase of the theoretical molar ratio of Ti:N from 2:1 to 1:2 enhanced the absorption of light to higher wavelengths. The increase of ratios until 1:2 promoted a decrease on the band gap from 3.19 to 2.51 eV.…”

Section: Effect Of Nitrogen Incorporationmentioning

confidence: 99%

“…This is the most typical response found in the literature that mentioned the incorporation of N into a TiO 2 lattice. Pérez et al [69] analyzed the Raman spectra for the different molar ratios of Ti:N for N-TiO 2 produced by the hydrothermal method. These authors concluded that for 2:1 and 1:1, the shift of the peaks to lower values correspond to the incorporation of N into the TiO 2 lattice [69].…”

Section: Effect Of Nitrogen Incorporationmentioning

confidence: 99%

“…Pérez et al [69] analyzed the Raman spectra for the different molar ratios of Ti:N for N-TiO 2 produced by the hydrothermal method. These authors concluded that for 2:1 and 1:1, the shift of the peaks to lower values correspond to the incorporation of N into the TiO 2 lattice [69]. On the other hand, Rizzo et al [8] verified a shift from the typical signal of anatase from 141 cm −1 to 144 cm −1 when characterizing N-TiO 2 , and related this to the change of the oxygen stoichiometry due to the presence of nitrogen.…”

Section: Effect Of Nitrogen Incorporationmentioning

confidence: 99%

“…Some controversy can be found regarding this characterization. In fact, the shift of typical peaks to the lower or higher values may be a sign of N incorporation in the TiO 2 lattice [8,31,69,74,75].…”

Section: Effect Of Nitrogen Incorporationmentioning

confidence: 99%

See 4 more Smart Citations

N–TiO2 Photocatalysts: A Review of Their Characteristics and Capacity for Emerging Contaminants Removal

Gomes

Lincho

Domingues

et al. 2019

Water

142

View full text Add to dashboard Cite

Titanium dioxide is the most used photocatalyst in wastewater treatment; its semiconductor capacity allows the indirect production of reactive oxidative species. The main drawback of the application of TiO2 is related to its high band-gap energy. The nonmetal that is most often used as the doping element is nitrogen, which is due to its capacity to reduce the band-gap energy at low preparation costs. There are multiple and assorted methods of preparation. The main advantages and disadvantages of a wide range of preparation methods were discussed in this paper. Different sources of N were also analyzed, and their individual impact on the characteristics of N–TiO2 was assessed. The core of this paper was focused on the large spectrum of analytical techniques to detect modifications in the TiO2 structure from the incorporation of N. The effect of N–TiO2 co-doping was also analyzed, as well as the main characteristics that are relevant to the performance of the catalyst, such as its particle size, surface area, quantum size effect, crystalline phases, and the hydrophilicity of the catalyst surface. Powder is the most used form of N–TiO2, but the economic benefits and applications involving continuous reactors were also analyzed with supported N–TiO2. Moreover, the degradation of contaminants emerging from water and wastewater using N–TiO2 and co-doped TiO2 was also discussed.

show abstract

Section: Effect Of Nitrogen Incorporationmentioning

confidence: 96%

Section: Effect Of Nitrogen Incorporationmentioning

confidence: 99%

Section: Effect Of Nitrogen Incorporationmentioning

confidence: 99%

Section: Effect Of Nitrogen Incorporationmentioning

confidence: 99%

Section: Effect Of Nitrogen Incorporationmentioning

confidence: 99%

See 3 more Smart Citations

N–TiO2 Photocatalysts: A Review of Their Characteristics and Capacity for Emerging Contaminants Removal

Gomes

Lincho

Domingues

et al. 2019

Water

142

View full text Add to dashboard Cite

show abstract

Preparation and characterization of N-doped ZnO and N-doped TiO2 beads for photocatalytic degradation of phenol and ammonia

Mandor

Amin

Abdelwahab

et al. 2022

Environ Sci Pollut Res

View full text Add to dashboard Cite

N-doped ZnO beads (NZB) and N-doped TiO2 beads (NTB) were synthesized via a modified sol–gel technique utilizing chitosan (CS)/polyvinyl alcohol (PVA) hydrogel beads as basic support for photocatalyst. Urea was used as a source of nitrogen in the preparation of N-doped ZnO beads, while ammonium acetate, CH3COONH4, was used as a nitrogen source in the production of N-doped TiO2 beads. The characteristics of synthesized beads were identified by scanning electron microscope (SEM), X-ray photoelectron spectroscopy analysis (XPS), X-ray diffraction (XRD), N2 adsorption–desorption isotherms, BET surface area, Fourier transform infrared (FT-IR) measurements, and diffuse reflectance spectroscopy (DRS) studies. The use of the nitrogen doping method for photocatalyst was performed to adjust the bandgap and electrical properties of ZnO and TiO2 by establishing acceptor defects. NZB and NTB with the intrinsic donor defect of oxygen vacancy and the nitrogen-to-oxygen acceptor defect could be activated by a less-energy UV consumption for efficient pollutant degradation. The results indicated that the as-synthesized NZB achieved much higher degradation activity than NTB, commercial ZnO, and TiO2 in the decomposition of a binary mixture composed of ammonia and phenol under UV light irradiation.

show abstract

Novel N-TiO2/SiO2/Fe3O4 nanocomposite as a photosensitizer with magnetism and visible light responsiveness for photodynamic inactivation of HeLa cells in vitro

Chang

Hou

Wang

et al. 2019

Ceramics International

View full text Add to dashboard Cite

Synthesis of N-TiO2 Effect of the Concentration of Nitrogen in the Band Gap

Cited by 21 publications

References 12 publications

N–TiO2 Photocatalysts: A Review of Their Characteristics and Capacity for Emerging Contaminants Removal

N–TiO2 Photocatalysts: A Review of Their Characteristics and Capacity for Emerging Contaminants Removal

Preparation and characterization of N-doped ZnO and N-doped TiO2 beads for photocatalytic degradation of phenol and ammonia

Novel N-TiO2/SiO2/Fe3O4 nanocomposite as a photosensitizer with magnetism and visible light responsiveness for photodynamic inactivation of HeLa cells in vitro

Contact Info

Product

Resources

About