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Rohloff, Martin ; Cosgun, Sevilay ; Massué, Cyriac ; Lunkenbein, Thomas ; Senyshyn, Anatoliy ; Lerch, Martin ; Fischer, Anna ; Behrens, Malte:
The role of synthesis conditions for structural defects and lattice strain in β-TaON and their effect on photo- and photoelectrocatalysis.
In: Zeitschrift für Naturforschung B.
Bd. 74
(2019)
Heft 1
.
- S. 71-83.
ISSN 1865-7117
DOI: https://doi.org/10.1515/znb-2018-0171
Abstract
The importance of the synthesis conditions on the structural and photocatalytic properties of tantalum oxide nitride was investigated by comparing two variants of phase-pure beta-TaON obtained from application of two different synthesis routes, leading to one unstrained and one heavily anisotropically microstrained beta-TaON as shown by XRD-based Rietveld refinement. HRTEM images reveal the origin of the strain to be lattice defects such as stacking faults. The strained beta-TaON was found to be the clearly less active semiconductor in photochemical and photoelectrochemical water oxidation. The lattice defects are assumed to act as charge carrier traps hindering the photo-generated holes to be displaced to the reaction sites at the surface.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | WOS:000454936700009 |
| Keywords: | photocatalysis; photoelectrochemistry; structural defects; tantalum oxide nitride; water splitting |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Eingestellt am: | 12 Jun 2025 12:45 |
| Letzte Änderung: | 12 Jun 2025 12:45 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/93713 |