Breeson, AC;
Sankar, G;
Goh, GKL;
Palgrave, RG;
(2017)
Phase quantification by X-ray photoemission valence band analysis applied to mixed phase TiO2 powders.
Applied Surface Science
, 423
pp. 205-209.
10.1016/j.apsusc.2017.06.161.
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Abstract
A method of quantitative phase analysis using valence band X-ray photoelectron spectra is presented and applied to the analysis of TiO 2 anatase-rutile mixtures. The valence band spectra of pure TiO 2 polymorphs were measured, and these spectral shapes used to fit valence band spectra from mixed phase samples. Given the surface sensitive nature of the technique, this yields a surface phase fraction. Mixed phase samples were prepared from high and low surface area anatase and rutile powders. In the samples studied here, the surface phase fraction of anatase was found to be linearly correlated with photocatalytic activity of the mixed phase samples, even for samples with very different anatase and rutile surface areas. We apply this method to determine the surface phase fraction of P25 powder. This method may be applied to other systems where a surface phase fraction is an important characteristic.
| Type: | Article |
|---|---|
| Title: | Phase quantification by X-ray photoemission valence band analysis applied to mixed phase TiO2 powders |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.apsusc.2017.06.161 |
| Publisher version: | http://doi.org/10.1016/j.apsusc.2017.06.161 |
| Language: | English |
| Additional information: | © 2017 Elsevier B.V. All rights reserved. This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | XPS; TiO2; Valence band; Phase ID |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1559575 |
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