| Journal: | Materials research |
| Database: | PERIÓDICA |
| System number: | 000312850 |
| ISSN: | 1516-1439 |
| Authors: | Rocha, Lucas Alonso1 Avila, Lilian Rodrigues Caetano, Bruno Leonardo Molina, Eduardo Ferreira Sacco, Herica Cristina Ciuffi, Katia Jorge Calefi, Paulo Sergio Nassar, Eduardo Jose |
| Institutions: | 1Universidade de Franca, Franca, Sao Paulo. Brasil |
| Year: | 2005 |
| Season: | Jul-Sep |
| Volumen: | 8 |
| Number: | 3 |
| Pages: | 361-364 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Nota breve o noticia |
| Approach: | Experimental |
| English abstract | In this work titanium sol was prepared from tetraethylorthotitanate (TEOT) in ethanol, stabilized with beta-diketonate 2,4 pentanedione in molar ratio 1:1 homogenized by magnetic stirring, europium ion was add as structural probe. The xerogels were heat treated at 500, 750 and 1000 °C and the characterization was realized by x-ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric analysis (TGA/DSC) and photoluminescence (PL). The excitation spectra of Eu (III) ion present maximum in 394 nm correspondent to 5L6 level and emission spectra present bands characteristic transitions arising from the 5 D0 ® 7FJ (J = 0, 1, 2, 3, 4) manifolds to samples treat at 500 and 750 °C. The Eu (III) emission disappear, when heated at 1000 °C, probably due to phase transition anatase to rutile and migrations of ions to the external surface that was proved by x-ray diffraction, transmission electronic microscopy and the thermogravimetric analyses of xerogels |
| Disciplines: | Ingeniería, Química |
| Keyword: | Ingeniería de materiales, Química industrial, Sol-gel, Xerogel, Titanio, Dopaje, Europio, Síntesis química, Luminiscencia |
| Keyword: | Engineering, Chemistry, Materials engineering, Industrial chemistry, Sol-gel, Xerogel, Titanium, Doping, Europium, Chemical synthesis, Luminescence |
| Full text: | Texto completo (Ver HTML) |
