A simple method to synthesize N-doped rutile titania with enhanced photocatalytic activity in sunlight

Gandhe, Aditi R.; Fernandes, Julio B.

doi:10.1016/j.jssc.2005.06.034

Cited by 85 publications

(35 citation statements)

References 23 publications

(27 reference statements)

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“…The second edge is located at 2.3 eV and was observed for the N-doped TiO 2 samples prepared at hydrolysis temperatures of 20 and 30°C. The new energy band forms as a result of the N 2p band, which is located above the O 2p valence band in N-doped TiO 2 (Aita et al 2004;Asahi et al 2001;Gandhe and Fernandes 2005). The N 2p band was not clearly observed when N-doped TiO 2 was prepared at a hydrolysis temperature of 40°C.…”

Section: Resultsmentioning

confidence: 95%

Characterization and photoactivity of Pt/N-doped TiO2 synthesized through a sol–gel process at room temperature

Huang

Tseng

et al. 2015

J Nanopart Res

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The rates of photocatalytic production of H 2 by Pt/N-doped TiO 2 are significantly affected by the hydrolysis temperature applied during the sol-gel process. Production rates increase as the hydrolysis temperature decreases from 40 to 20°C. The effects of the hydrolysis temperature on the properties and water-splitting behavior of photocatalysts were investigated. Characterization results showed that hydrolysis temperatures higher than 40°C induce the formation of the rutile phase and particle agglomeration, reduce the N-dopant content, and decrease the range of visible-light absorption. In this study, a low hydrolysis temperature of about 20°C is optimal for the sol-gel preparation of N-doped TiO 2 ; this temperature favors the formation of high-purity anatase, small particle size, extensive visible-light absorption, and excellent rates of photocatalytic production of H 2 (about 2100 lmol h -1 g -1 ).

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Section: Resultsmentioning

confidence: 95%

Characterization and photoactivity of Pt/N-doped TiO2 synthesized through a sol–gel process at room temperature

Huang

Tseng

et al. 2015

J Nanopart Res

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“…14 These second-generation 53 TiO 2 materials were photoactive over the UV and visible- 54 light region. Controversy still remains about the nature of 55 the dopant species and electronic structure of nitrogen 56 doped titania, which is highly dependent on the method of 57 preparation. Some researchers proposed the existence of 58 surface adsorbed NO X and NH X , while others proposed the 59 presence of lattice nitrogen.…”

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confidence: 99%

Highly Visible Light Active TiO_2−xN_x Heterojunction Photocatalysts

Seery²,

et al. 2010

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Nitrogen doped anatase-rutile heterojunctions are successfully synthesized through an ethylenediaminetetraacetic acid (EDTA) modified sol−gel process. An FT-IR study of EDTA modified TiO2 gel confirms the existence of an ionic intermediate (as indicated by a Δν value of 233 cm−1). Differential scanning calorimetry (DSC), X-ray diffraction (XRD), and Raman spectroscopy are employed to study the phase evolution, phase purity, and crystallite size of samples. Formations of O−Ti−N and N−Ti−N bonds in calcined samples are confirmed using XPS and FT-IR spectroscopy. All EDTA modified samples show significantly higher visible light photocatalytic activity than the unmodified sample. The most active nitrogen doped heterojunction obtained at 400 °C exhibits 9-fold visible light activity in comparison to the standard photocatalyst Degussa P-25. It is proposed that the photo excited electrons (from the visible midgap level) are effectively transferred from the conduction band of anatase to that of rutile causing effective electron−hole separation, which is responsible for the higher visible light activity and lower photoluminescence (PL) intensity.

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“…The band gap of the samples was determined by the equation E g = 1239.8/, where E g is the band gap (eV) and λ (nm) is the wavelength of the absorption edges in the spectrum [16]. The results are presented in Table 3.…”

Section: Uv-vis Diffuse Reflectance Characterizationmentioning

confidence: 99%

Effect of metal doping into Ce0.5Zr0.5O2 on photocatalytic activity of TiO2/Ce0.45Zr0.45M0.1OX (M=Y, La, Mn)

Lin-tao

Gong

et al. 2007

Journal of Hazardous Materials

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A simple method to synthesize N-doped rutile titania with enhanced photocatalytic activity in sunlight

Cited by 85 publications

References 23 publications

Characterization and photoactivity of Pt/N-doped TiO2 synthesized through a sol–gel process at room temperature

Characterization and photoactivity of Pt/N-doped TiO2 synthesized through a sol–gel process at room temperature

Highly Visible Light Active TiO_2−xN_x Heterojunction Photocatalysts

Effect of metal doping into Ce0.5Zr0.5O2 on photocatalytic activity of TiO2/Ce0.45Zr0.45M0.1OX (M=Y, La, Mn)

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A simple method to synthesize N-doped rutile titania with enhanced photocatalytic activity in sunlight

Cited by 85 publications

References 23 publications

Characterization and photoactivity of Pt/N-doped TiO2 synthesized through a sol–gel process at room temperature

Characterization and photoactivity of Pt/N-doped TiO2 synthesized through a sol–gel process at room temperature

Highly Visible Light Active TiO2−xNx Heterojunction Photocatalysts

Effect of metal doping into Ce0.5Zr0.5O2 on photocatalytic activity of TiO2/Ce0.45Zr0.45M0.1OX (M=Y, La, Mn)

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Highly Visible Light Active TiO_2−xN_x Heterojunction Photocatalysts