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Nitrogen modified nanostructured titania: electronic, structural and visible‐light photocatalytic properties
Author(s) -
Kontos A. I.,
Kontos A. G.,
Raptis Y. S.,
Falaras P.
Publication year - 2008
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.200802006
Subject(s) - photocatalysis , visible spectrum , methyl orange , materials science , band gap , titanium dioxide , raman spectroscopy , diffuse reflectance infrared fourier transform , photochemistry , titanate , spectroscopy , anatase , chemical engineering , optoelectronics , chemistry , catalysis , optics , ceramic , organic chemistry , composite material , physics , engineering , quantum mechanics
Nitrogen doped titanium dioxide (N‐TiO 2 ) powders were synthesized as the hydrolysis condensation product of tetrabutyl titanate reaction with urea. Following adequate thermal treatment, nitrogen was introduced at interstitial lattice sites, mostly near the surface of the nanocrystals. These defects, detectable by Raman spectroscopy, induce a shift of the energy band gap to the visible range (at about 2.3 eV) that justifies significant visible light photocatalytic activity towards degradation of methyl orange (MO) pollutant.UV–visible diffuse reflectance–transmittance spectra of nano‐ structured N‐TiO 2 , with sketch of its energy band gap. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)