Phase formation and luminescence properties in Eu3+-doped TiO2 nanoparticles prepared by thermal plasma pyrolysis of aqueous solutions
| Autor: | Yusuke Moriyoshi, Hiromi Hamanaka, Norio Kobayashi, Takamasa Ishigaki, Ji-Guang Li, Masashi Ikeda |
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| Rok vydání: | 2008 |
| Předmět: |
Anatase
Aqueous solution Materials science Photoluminescence Inorganic chemistry Metals and Alloys Pyrochlore chemistry.chemical_element Surfaces and Interfaces engineering.material Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Rutile Materials Chemistry engineering Europium Luminescence Titanium |
| Zdroj: | Thin Solid Films. 516:6640-6644 |
| ISSN: | 0040-6090 |
| Popis: | Eu 3+ -doped TiO 2 nanopowders were synthesized by Ar/O 2 induction thermal plasma pyrolysis of atomized aqueous solutions containing titanium(III) trichloride and europium(III) nitrate. TiO 2 nanocrystals are mixtures of the anatase and rutile polymorphs, but the rutile content increases when more Eu 3+ is added. The content of Eu 3+ soluble in the TiO 2 lattice was limited to 0.3% of Eu 3+ above this, Eu 2 Ti 2 O 7 pyrochlore was formed. Photoluminescence measurements revealed that the Eu 3+ -doped TiO 2 nanopowders exhibited sharp emission at 617 nm, but emission through energy transfer from the TiO 2 host to the activator Eu 3+ ions was not observed. |
| Databáze: | OpenAIRE |
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