Characterization of anatase TiO2 nanopowder by variable-temperature Raman spectroscopy | Zendy

M. Šćepanović | Zendy; M. GrujićBrojčin | Zendy; Z. DohčevićMitrović | Zendy; Zoran V. Popović | Zendy

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Characterization of anatase TiO2 nanopowder by variable-temperature Raman spectroscopy

Author(s) -

M. Šćepanović,

M. GrujićBrojčin,

Z. DohčevićMitrović,

Zoran V. Popović

Publication year - 2009

Publication title -

science of sintering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.309

H-Index - 25

eISSN - 1820-7413

pISSN - 0350-820X

DOI - 10.2298/sos0901067s

Subject(s) - raman spectroscopy , anatase , crystallite , materials science , blueshift , phonon , grain size , atmospheric temperature range , analytical chemistry (journal) , phase (matter) , spectroscopy , condensed matter physics , photoluminescence , optics , metallurgy , chemistry , photocatalysis , optoelectronics , thermodynamics , biochemistry , physics , organic chemistry , chromatography , quantum mechanics , catalysis

Raman spectroscopy has been used for characterization of commercial nanosized TiO2 powder with declared grain size of 5 nm. The Raman spectra measured in Stokes and anti-Stokes regime confirm the anatase phase of TiO2 powder in temperature range 25-1173K. It is shown that phonon-confinement (due to small grain size) and nonstoichiometry (caused by laser irradiation in vacuum) have a great influence on blueshift and broadening of the main Eg Raman mode at low temperatures, while the influence of the strong anharmonic effect becomes dominant at higher temperatures. The phonon confinement effect decreases due to the crystallite growth at temperatures above 673K

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