Synthesis of Gd2O3:Eu3+nanocrystallites emmbeded in SiO2 using polyvinylpyrrolidone (pvp) by sol-gel process
Europium doped gadolinium oxide were synthesized by sol-gel method. SiO 2 matrix was prepared by sol-gel method using TEOS, am- monium hydroxide and water as precursors. Both sols were mixed in different molar ratio in order to obtain Gd 2 O 3 :Eu 3+ /SiO 2 stable sol. We report the structure and mo...
| Autores: | , , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2011 |
| País: | México |
| Recursos: | Instituto Politécnico Nacional |
| Repositorio: | Redalyc-IPN |
| OAI Identifier: | oai:redalyc.org:57030389013 |
| Acesso em linha: | https://www.redalyc.org/articulo.oa?id=57030389013 |
| Access Level: | acceso abierto |
| Palavra-chave: | Física, Astronomía y Matemáticas PVP sol gel silica Keywords |
| Resumo: | Europium doped gadolinium oxide were synthesized by sol-gel method. SiO 2 matrix was prepared by sol-gel method using TEOS, am- monium hydroxide and water as precursors. Both sols were mixed in different molar ratio in order to obtain Gd 2 O 3 :Eu 3+ /SiO 2 stable sol. We report the structure and morphology of Gd 2 O 3 :Eu 3+ (2.5% mol)/SiO 2 with PVP (average molecular weight 1300 000) analyzed using DRX and SEM. The XRD pattern of Gd 2 O 3 :Eu 3+ /SiO 2 powders heat treated at 700 ± C for 10 min revealed crystalline cubic phase. SEM analyses showed significant changes in the morphology which depends on the concentration ratio G 2 O 3 :SiO 2 . Luminescent properties of glass ceramics (Gd:Si=8:1) showed intense emission bands in comparison with bare Gd 2 O 3 :Eu 3+ powders. This result is promising to the elaboration of thick films with optical properties. |
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