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The Influence of the Ammonolysis Temperature on the Photocatalytic Activity of β-TaON
The Influence of the Ammonolysis Temperature on the Photocatalytic Activity of β-TaON
- Source :
- International Journal of Photoenergy, Vol 2013 (2013)
- Publication Year :
- 2013
- Publisher :
- Hindawi Limited, 2013.
-
Abstract
- Phase-pure tantalum oxynitride (β-TaON) powders were synthesized by thermal ammonolysis of Ta2O5 powders. X-ray diffraction revealed an enlargement of the unit cell and an increase of the crystallite size with increasing ammonolysis temperature. Scanning electron microscopy showed reduced particle sizes for β-TaON synthesized at 800 and compared to the precursor oxide. With increasing nitridation temperature the Brunauer-Emmett-Teller surface area was reduced and the nitrogen content increased. UV-Vis spectroscopy showed a bandgap energy of 2.6–2.4 eV. The highest oxygen evolution rate of 220 μmol·g−1·h−1 was achieved for β-TaON synthesized at . The factors determining the photocatalytic activity of β-TaON powders were found to be the specific surface area and defects in the β-TaON.
- Subjects :
- Renewable energy sources
TJ807-830
Subjects
Details
- Language :
- English
- ISSN :
- 1110662X and 1687529X
- Volume :
- 2013
- Database :
- Directory of Open Access Journals
- Journal :
- International Journal of Photoenergy
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.b1cce7617d4556ac7b5250625ef313
- Document Type :
- article
- Full Text :
- https://doi.org/10.1155/2013/507194