Correlating the visible light photoactivity of N-doped TiO 2 with brookite particle size and bridged-nitro surface species

Zs Pap, L. Baia, K. Mogyorósi, A. Dombi, A. Oszkó, V. Danciu

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Visible light N-doped TiO 2 photocatalysts were obtained by sol-gel method, in CH 3COOH and/or HNO 3 media, followed by rapid calcination. The photocatalysts were characterized by XRD, BET, DRS, XPS, FT-IR, Raman, TEM, and nonmetal elemental analysis. The visible light activity of these materials was evaluated using phenol as a model pollutant. The obtained N-doped TiO 2 contained anatase (91.4-100%; d A = 6.5-14 nm) and brookite (0-8.6%; d B = 6.1-14.9 nm). The observed decomposition rates were dependent by the brookite particle size and the presence of bridged-nitro surface species. The best performing material was 3.2 times more active than the nitrogen doped reference commercial photocatalyst (TP-S201).

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalCatalysis Communications
Volume17
DOIs
Publication statusPublished - Jan 5 2012

Fingerprint

Photocatalysts
Particle size
Nonmetals
Phenol
Calcination
Titanium dioxide
Sol-gel process
Phenols
Nitrogen
X ray photoelectron spectroscopy
Transmission electron microscopy
Decomposition
Chemical analysis
titanium dioxide

Keywords

  • Acetic acid
  • Bridged-nitro group
  • Brookite
  • Nitric acid
  • Nitrogen doped titania
  • Rapid crystallization

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Chemistry(all)

Cite this

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title = "Correlating the visible light photoactivity of N-doped TiO 2 with brookite particle size and bridged-nitro surface species",
abstract = "Visible light N-doped TiO 2 photocatalysts were obtained by sol-gel method, in CH 3COOH and/or HNO 3 media, followed by rapid calcination. The photocatalysts were characterized by XRD, BET, DRS, XPS, FT-IR, Raman, TEM, and nonmetal elemental analysis. The visible light activity of these materials was evaluated using phenol as a model pollutant. The obtained N-doped TiO 2 contained anatase (91.4-100{\%}; d A = 6.5-14 nm) and brookite (0-8.6{\%}; d B = 6.1-14.9 nm). The observed decomposition rates were dependent by the brookite particle size and the presence of bridged-nitro surface species. The best performing material was 3.2 times more active than the nitrogen doped reference commercial photocatalyst (TP-S201).",
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AU - Pap, Zs

AU - Baia, L.

AU - Mogyorósi, K.

AU - Dombi, A.

AU - Oszkó, A.

AU - Danciu, V.

PY - 2012/1/5

Y1 - 2012/1/5

N2 - Visible light N-doped TiO 2 photocatalysts were obtained by sol-gel method, in CH 3COOH and/or HNO 3 media, followed by rapid calcination. The photocatalysts were characterized by XRD, BET, DRS, XPS, FT-IR, Raman, TEM, and nonmetal elemental analysis. The visible light activity of these materials was evaluated using phenol as a model pollutant. The obtained N-doped TiO 2 contained anatase (91.4-100%; d A = 6.5-14 nm) and brookite (0-8.6%; d B = 6.1-14.9 nm). The observed decomposition rates were dependent by the brookite particle size and the presence of bridged-nitro surface species. The best performing material was 3.2 times more active than the nitrogen doped reference commercial photocatalyst (TP-S201).

AB - Visible light N-doped TiO 2 photocatalysts were obtained by sol-gel method, in CH 3COOH and/or HNO 3 media, followed by rapid calcination. The photocatalysts were characterized by XRD, BET, DRS, XPS, FT-IR, Raman, TEM, and nonmetal elemental analysis. The visible light activity of these materials was evaluated using phenol as a model pollutant. The obtained N-doped TiO 2 contained anatase (91.4-100%; d A = 6.5-14 nm) and brookite (0-8.6%; d B = 6.1-14.9 nm). The observed decomposition rates were dependent by the brookite particle size and the presence of bridged-nitro surface species. The best performing material was 3.2 times more active than the nitrogen doped reference commercial photocatalyst (TP-S201).

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KW - Bridged-nitro group

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KW - Nitric acid

KW - Nitrogen doped titania

KW - Rapid crystallization

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