DOI: 10.1111/jace.13201. Tantalum Enrichment in Tantalum‐Doped Titanium Dioxide

Tantalum Enrichment in Tantalum‐Doped Titanium Dioxide

10.1111/jace.13201

Crossref journal-article

Wiley

Journal of the American Ceramic Society (311)

Abstract

This investigation has assessed the behavior of Ta enrichment in Ta‐doped TiO2 under various conditions of controlled oxygen activity and temperature. The aim has been to establish the relationships between specific processing conditions and the resulting compositional variation within the surface and near‐surface region. Under the application of oxidizing conditions [p(O2) = 101 kPa], it has been observed that Ta will strongly enrich the surface of Ta‐doped TiO2 irrespective of the annealing temperature (over the range of 1173–1523 K). However, under reducing conditions [p(O2) in the vicinity of 10−10 Pa], Ta enrichment is observed at 1173 K, but Ta depletion from the surface and near‐surface is observed at 1348 and 1523 K. This is attributed to an apparent lack of stability of the surface phase, which could possibly be TiTa2O7. The results for the investigation contribute to the engineering of TiO2‐based photoelectrode materials that possess improved charge separation properties.

Bibliography

Sheppard, L. R., Holik, J., Liu, R., Macartney, S., & Wuhrer, R. (2014). Tantalum Enrichment in TantalumâDoped Titanium Dioxide. Journal of the American Ceramic Society, 97(12), 3793â3799. Portico.

Authors 5

Leigh R. Sheppard (first)
John Holik (additional)
Rong Liu (additional)
Sam Macartney (additional)
Richard Wuhrer (additional)

References 29 Referenced 18

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Dates

Type	When
Created	11 years ago (Sept. 1, 2014, 3:15 a.m.)
Deposited	1 year, 11 months ago (Sept. 18, 2023, 2:01 a.m.)
Indexed	6 months, 2 weeks ago (Feb. 21, 2025, 7:44 a.m.)
Issued	11 years ago (Sept. 1, 2014)
Published	11 years ago (Sept. 1, 2014)
Published Online	11 years ago (Sept. 1, 2014)
Published Print	10 years, 9 months ago (Dec. 1, 2014)

Funders 1

Australian Research Council 10.13039/501100000923
Region: Oceania
gov (Other non-profit organizations)
Labels4
1. arc_gov_au
2. The Australian Research Council
3. Australian Government Australian Research Council (ARC)
4. ARC
Awards1
1. DP0987084

BibTeX

@article{Sheppard_2014, title={Tantalum Enrichment in Tantalum‐Doped Titanium Dioxide}, volume={97}, ISSN={1551-2916}, url={http://dx.doi.org/10.1111/jace.13201}, DOI={10.1111/jace.13201}, number={12}, journal={Journal of the American Ceramic Society}, publisher={Wiley}, author={Sheppard, Leigh R. and Holik, John and Liu, Rong and Macartney, Sam and Wuhrer, Richard}, editor={Rohrer, G.}, year={2014}, month=sep, pages={3793–3799} }

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