Details
Originalsprache | Englisch |
---|---|
Seiten (von - bis) | 505-516 |
Seitenumfang | 12 |
Fachzeitschrift | Faraday discussions |
Jahrgang | 197 |
Publikationsstatus | Veröffentlicht - 1 Apr. 2017 |
Abstract
Herein, we report the effect of the laser illumination during the diffuse-reflectance laser-flash-photolysis measurements on the morphological and optical properties of TiO 2 powders. A grey-blue coloration of the TiO 2 nanoparticles has been observed after intense laser illumination. This is explained by the formation of nonreactive trapped electrons accompanied by the release of oxygen atoms from the TiO 2 matrix as detected by means of UV-vis and EPR spectroscopy. Moreover, in the case of the pure anatase sample a phase transition of some TiO 2 nanoparticles located in the inner region from anatase to rutile occurred. It is suggested that these structural changes in TiO 2 are caused by an energy and charge transfer to the TiO 2 lattice.
ASJC Scopus Sachgebiete
- Chemie (insg.)
- Physikalische und Theoretische Chemie
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in: Faraday discussions, Jahrgang 197, 01.04.2017, S. 505-516.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Laser-flash-photolysis-spectroscopy: A nondestructive method?
AU - Schneider, J.
AU - Nikitin, K.
AU - Dillert, R.
AU - Bahnemann, D.W.
N1 - Publisher Copyright: © The Royal Society of Chemistry 2017. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/4/1
Y1 - 2017/4/1
N2 - Herein, we report the effect of the laser illumination during the diffuse-reflectance laser-flash-photolysis measurements on the morphological and optical properties of TiO 2 powders. A grey-blue coloration of the TiO 2 nanoparticles has been observed after intense laser illumination. This is explained by the formation of nonreactive trapped electrons accompanied by the release of oxygen atoms from the TiO 2 matrix as detected by means of UV-vis and EPR spectroscopy. Moreover, in the case of the pure anatase sample a phase transition of some TiO 2 nanoparticles located in the inner region from anatase to rutile occurred. It is suggested that these structural changes in TiO 2 are caused by an energy and charge transfer to the TiO 2 lattice.
AB - Herein, we report the effect of the laser illumination during the diffuse-reflectance laser-flash-photolysis measurements on the morphological and optical properties of TiO 2 powders. A grey-blue coloration of the TiO 2 nanoparticles has been observed after intense laser illumination. This is explained by the formation of nonreactive trapped electrons accompanied by the release of oxygen atoms from the TiO 2 matrix as detected by means of UV-vis and EPR spectroscopy. Moreover, in the case of the pure anatase sample a phase transition of some TiO 2 nanoparticles located in the inner region from anatase to rutile occurred. It is suggested that these structural changes in TiO 2 are caused by an energy and charge transfer to the TiO 2 lattice.
UR - http://www.scopus.com/inward/record.url?scp=85021723205&partnerID=8YFLogxK
U2 - 10.1039/c6fd00193a
DO - 10.1039/c6fd00193a
M3 - Article
VL - 197
SP - 505
EP - 516
JO - Faraday discussions
JF - Faraday discussions
SN - 1359-6640
ER -