TiO2-nitrogen doped for both the UV and Visible light photocatalysis

• Autorzy: Morawski A. W. , Janus M.
• Języki publikacji: EN

Abstrakty

EN

The investigation on incorporating the nitrogen group into titanium dioxide (Degussa P25) in order to obtain a visible-light active TiO2-xNx photocatalyst was performed. Titanium dioxide was modified by a heat treatment at different temperatures (450, 500 and 550°C) in ammonia atmosphere for 3, 6, 8 or 10 hours, respectively. The presence of the nitrogen groups on the catalyst surface was determined by the Fourier Transform Infrared Spectroscopy (FT-IR). The amount of the nitrogen built in TiO2 was determined on the basis of the thermogravimetric analysis (TG/DTA). It was found that the modification of TiO2 with ammonia resulted in a shift of the absorption spectrum of TiO2 towards solar spectrum wavelength (lmax = 479 nm; EG = 2.59 eV). The sample of the highest photoactivity contained ca. 2% of nitrogen. The modification of titanium dioxide with nitrogen increases the range of practical applications of TiO2 in water treatment processes due to the enhancement of its activity under both UV and visible light. This gives the possibility to utilize the solar light.

Słowa kluczowe

EN

TiO2-nitrogen; photocatalysis; UV/Vis photocatalysts

PL

TiO2-azot; fotokataliza; fotokatalizator

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2005
• Tom: Vol. 7, nr 3
• Strony: 81--86
• Opis fizyczny: Bibliogr. 16 poz., rys.

Twórcy

autor

Morawski A. W.

• Szczecin University of Technology, The Institute of Chemical and Environment Engineering, Dep. of Water Technology and Environment Engineering, ul. Pułaskiego 10, 70-322 Szczecin

autor

Janus M.

• Szczecin University of Technology, The Institute of Chemical and Environment Engineering, Dep. of Water Technology and Environment Engineering, ul. Pułaskiego 10, 70-322 Szczecin

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