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The application of Raman and anti-stokes Raman spectroscopy for in-situ monitoring of structural changes in laser irradiated titanium dioxide materials.

Rigby, Stephanie J.; Al-Obaidi, Ala H.R.; Lee, Soo-Keun; McStay, Daniel; Robertson, Peter K.J.

Authors

Stephanie J. Rigby

Ala H.R. Al-Obaidi

Soo-Keun Lee

Daniel McStay

Peter K.J. Robertson



Abstract

The use of Raman and anti-stokes Raman spectroscopy to investigate the effect of exposure to high power laser radiation on the crystalline phases of TiO 2 has been investigated. Measurement of the changes, over several time integrals, in the Raman and anti-stokes Raman of TiO 2 spectra with exposure to laser radiation is reported. Raman and anti-stokes Raman provide detail on both the structure and the kinetic process of changes in crystalline phases in the titania material. The effect of laser exposure resulted in the generation of increasing amounts of the rutile crystalline phase from the anatase crystalline phase during exposure. The Raman spectra displayed bands at 144 cm -1 (A1g), 197 cm -1 (Eg), 398 cm -1 (B1g), 515 cm -1 (A1g), and 640 cm -1 (Eg) assigned to anatase which were replaced by bands at 143 cm -1 (B1g), 235 cm -1 (2 phonon process), 448 cm -1 (Eg) and 612 cm -1 (A1g) which were assigned to rutile. This indicated that laser irradiation of TiO 2 changes the crystalline phase from anatase to rutile. Raman and anti-stokes Raman are highly sensitive to the crystalline forms of TiO 2 and allow characterisation of the effect of laser irradiation upon TiO 2 . This technique would also be applicable as an in situ method for monitoring changes during the laser irradiation process.

Citation

RIGBY, S.J., AL-OBAIDI, A.H.R., LEE, S.-K., McSTAY, D. and ROBERTSON, P.K.J. 2006. The application of Raman and anti-stokes Raman spectroscopy for in-situ monitoring of structural changes in laser irradiated titanium dioxide materials. Applied surface science [online], 252(22), pages 7948-7952. Available from: https://doi.org/10.1016/j.apsusc.2005.10.003

Journal Article Type Article
Acceptance Date Sep 30, 2006
Online Publication Date Sep 30, 2006
Publication Date Sep 30, 2006
Deposit Date Jul 2, 2010
Publicly Available Date Jul 2, 2010
Journal Applied surface science
Print ISSN 0169-4332
Electronic ISSN 1873-5584
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 252
Issue 22
Pages 7948-7952
DOI https://doi.org/10.1016/j.apsusc.2005.10.003
Keywords TiO2; Photocatalyst; Raman spectroscopy; Laser irradiation
Public URL http://hdl.handle.net/10059/495

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