Synthesis, characterization and electronic structure of nitrogen-doped TiO2 nanopowder

Michalow, Katarzyna A.; Logvinovich, D.; Weidenkaff, Anke; Amberg, Michel; Fortunato, Giuseppino; Heel, André; Graule, Thomas; Rękas, M.

doi:10.1016/j.cattod.2008.12.015

Cited by 115 publications

(63 citation statements)

References 36 publications

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“…On the contrary, a different behaviour was obtained when the crystallite size obtained from the XRD measurements is considered (Table 1). In agreement with our earlier report [36] larger crystallite sizes were observed for anatase, which is in contrast to observations made for commercial TiO 2 -P25. The anatase crystallite size was nearly constant up to 2 at.% Cr but it increased significantly with higher Cr content.…”

Section: Resultscontrasting

confidence: 57%

“…4b the band gap is shifted from about 3.0 eV for undoped TiO 2 to about 1.5 eV for TiO 2 :10 at.% Cr. It has to be mentioned that the Tauc method, where the absorption coefficient is calculated from a Kubelka-Munk function, provides only a rough value for the band gap, which in this case is an average value of all optical transitions appearing in the material [36]. As can be seen in Fig.…”

Section: Resultsmentioning

confidence: 99%

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Flame-made visible light active TiO2:Cr photocatalysts: Correlation between structural, optical and photocatalytic properties

et al. 2013

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Section: Resultscontrasting

confidence: 57%

Section: Resultsmentioning

confidence: 99%

Flame-made visible light active TiO2:Cr photocatalysts: Correlation between structural, optical and photocatalytic properties

et al. 2013

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“…Optical absorption property of a photocatalyst is often closely associated with its optical energy gap. The band gap energies of the Bi 2 (Fe 1-x Al x ) 4 O 9 (x = 0, 0.1, 0.3, 0.5, and 0.7) samples can be estimated by extrapolating the straight portion of (ahm) 2 against hm plot to a = 0 based on the Eq 1 [16], as shown in Fig. 4b.…”

Section: Ftir Analysismentioning

confidence: 99%

Enhanced photocatalytic activity in Al-substituted Bi2Fe4O9 submicrocrystals

Liu

Yin

et al. 2012

J Mater Sci

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Bi 2 (Fe 1-x Al x ) 4 O 9 (x = 0, 0.1, 0.3, 0.5, and 0.7) samples were synthesized by a simple hydrothermal method. The samples were characterized by X-ray diffraction, scanning electron microscopy, Fourier transformed infrared spectra, N 2 -sorption, and UV-Vis diffuse reflectance spectra, and their photocatalytic activities were evaluated by the degradation of methyl orange under visible-light irradiation. The results reveal that the Al substitution can effectively improve photocatalytic performance, which is attributed to the increase of surface area, the improvement of energy band structure, and the distortion of the Fe-O octahedron in Al-substituted samples. In addition, it is found that the photocatalytic activity to decompose methyl orange under visible-light illumination increases monotonically as x increases from zero to 0.5 in Bi 2 (Fe 1-x Al x ) 4 O 9 and then decreases for x = 0.7, which is believed to be associated with the distribution of Fe 3? ions over the octahedral and tetrahedral sites.

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“…Ammonolysis, wet chemical route and modified peroxide sol-gel method have been reported by Michalow et al [7], Bianchi et al [13] and Jagadale et al [6], respectively. Generally, the use of aqueous ammonia for the preparation of peroxotitanate complexes and TiO 2 nanomaterials is used [6,[14][15][16][17].…”

Section: Introductionmentioning

confidence: 93%

“…Consequently, many research groups [4][5][6][7][8][9][10][11][12] have reported theoretical and experimental studies on promising methods to produce visible-light sensitive TiO 2 photocatalysts. Burda et al [4] noticed that the direct amination of TiO 2 changed the original whitish colour to yellow.…”

Section: Introductionmentioning

confidence: 99%

Co-doped mesoporous titania photocatalysts prepared from a peroxo-titanium complex solution

Saliby

Erdei

McDonagh

et al. 2014

Materials Research Bulletin

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In this study, nitrogen doped and nitrogen/silver co-doped TiO 2 photocatalsysts were fabricated using a sol-gel method at room temperature. The obtained gels were neutralised, washed with pure water, and calcined at 400 °C for 4 hours. The photocatalysts were characterised by scanning and transmission electron microscopy, X-ray diffraction, diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy, and BET specific surface area. Page 2The results showed that spherical particles with anatase structure were produced after annealing at 400 °C. N 1s (400 eV) and Ag 3d (367.3 eV) states indicated that nitrogen doping and silver co-doping were in the form of NO bonds and AgO, respectively. The photocatalytic activity of photocatalysts was investigated using a batch reactor system exposed to artificial solar irradiation. Both nitrogen and silver/nitrogen co-doped materials were effective in the photocatalytic degradation of hexamethyl pararosaniline chloride.

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Synthesis, characterization and electronic structure of nitrogen-doped TiO2 nanopowder

Cited by 115 publications

References 36 publications

Flame-made visible light active TiO2:Cr photocatalysts: Correlation between structural, optical and photocatalytic properties

Flame-made visible light active TiO2:Cr photocatalysts: Correlation between structural, optical and photocatalytic properties

Enhanced photocatalytic activity in Al-substituted Bi2Fe4O9 submicrocrystals

Co-doped mesoporous titania photocatalysts prepared from a peroxo-titanium complex solution

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