Effect of single-cation doping and codoping with Mn and Fe on the photocatalytic performance of TiO 2 thin films
| Autor: | Auppatham Nakaruk, M.Z. Lin, W.-F. Chen, Hsin-Kai Chen, Pramod Koshy, C. C. Sorrell |
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| Rok vydání: | 2014 |
| Předmět: |
Anatase
Spin coating Materials science Dopant Renewable Energy Sustainability and the Environment Band gap Inorganic chemistry Doping Energy Engineering and Power Technology Condensed Matter Physics Amorphous solid chemistry.chemical_compound Fuel Technology chemistry Chemical engineering Titanium dioxide Thin film |
| Zdroj: | International Journal of Hydrogen Energy. 39:21500-21511 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2014.02.013 |
| Popis: | TiO 2 thin films with varying Mn and Fe dopant levels (0.01–5.00 mol% metal basis; single cation doping and codoping) were deposited on soda-lime-silica glass substrates by spin coating, followed by annealing in air at 450 °C for 2 h. The mineralogical, morphological, optical, and photocatalytic properties of the thin films were determined. The fabricated films were ∼250 nm thick and they were comprised of grains of ∼20–30 nm size. Anatase (or amorphous titania) was the only phase in essentially all the films, with the dopants' being soluble in anatase. All of the films were transparent (∼80%) in the visible region and the optical indirect band gaps were ∼3.4 eV. Photocatalytic testing (≤24 h) showed that the extent of photodegradation decreased with increasing dopant levels. The 0.01 mol% Fe-doped sample showed the best photoactivity since, at this doping level, the negative effects of electron/hole recombination and lattice distortion probably were minimal. |
| Databáze: | OpenAIRE |
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