| Autor: | M. S. Tokumoto, Sandra Helena Pulcinelli, Celso Valentim Santilli, Valérie Briois |
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| Rok vydání: | 2003 |
| Předmět: |
Materials science
Photoluminescence Coordination sphere Extended X-ray absorption fine structure Inorganic chemistry Nanoparticle chemistry.chemical_element General Chemistry Zinc Condensed Matter Physics Electronic Optical and Magnetic Materials Biomaterials chemistry Materials Chemistry Ceramics and Composites Molecule Fourier transform infrared spectroscopy Sol-gel |
| Zdroj: | Journal of Sol-Gel Science and Technology. 26:547-551 |
| ISSN: | 0928-0707 |
| DOI: | 10.1023/a:1020711702332 |
| Popis: | The structure of zinc acetate derived precursor currently used in the sol-gel synthesis of ZnO nanoparticles is described. The reaction products obtained before and after reflux of ethanolic zinc acetate solution have been studied by UV-Vis, photoluminescence, FTIR and EXAFS at the Zn K edge. EXAFS results evidence for both precursor solutions a change from the octahedral coordination sphere of oxygen atoms characteristic of the solid zinc acetate dihydrate compound into a four-fold environment. The EXAFS spectra of precursor solutions can be satisfactorily reproduced using the molecular structure reported for Zn4O(Ac)6 (Ac = COOCH3). UV-Vis and FTIR measurements are also in agreement with the formation of this oligomeric precursor. The structural modification is more pronounced after reflux at 80°C, because the increase of the Zn4O(Ac)6 amount and the formation of nearly 3.0 nm sized ZnO nanoparticle. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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