In situ and simultaneous nanostructural and spectroscopic studies of ZnO nanoparticle and Zn-HDS formations from hydrolysis of ethanolic zinc acetate solutions induced by water
| Autor: | M. S. Tokumoto, Christine Giorgetti, Sandra Helena Pulcinelli, Valérie Briois, François Baudelet, Elisabeth Dartyge, Celso Valentim Santilli |
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| Rok vydání: | 2006 |
| Předmět: |
Extended X-ray absorption fine structure
Chemistry Small-angle X-ray scattering Inorganic chemistry Nanoparticle chemistry.chemical_element General Chemistry Zinc Condensed Matter Physics Electronic Optical and Magnetic Materials Biomaterials chemistry.chemical_compound Double salt Colloid Ultraviolet visible spectroscopy Chemical engineering Zinc hydroxide Materials Chemistry Ceramics and Composites |
| Zdroj: | Journal of Sol-Gel Science and Technology. 39:25-36 |
| ISSN: | 1573-4846 0928-0707 |
| DOI: | 10.1007/s10971-006-6973-2 |
| Popis: | The simultaneous formation of nanometer sized zinc oxide (ZnO), and acetate zinc hydroxide double salt (Zn-HDS) is described. These phases, obtained using the sol-gel synthesis route based on zinc acetate salt in alcoholic media, were identified by direct characterization of the reaction products in solution using complementary techniques: nephelometry, in situ Small-Angle X-ray Scattering (SAXS), UV-Vis spectroscopy and Extended X-ray Absorption Fine Structures (EXAFS). In particular, the hydrolytic pathway of ethanolic zinc acetate precursor solutions promoted by addition of water with the molar ratio N=[H2O]/[Zn2+] = 0.05 was investigated in this paper. The aim was to understand the formation mechanism of ZnO colloidal suspension and to reveal the factors responsible for the formation of Zn-HDS in the final precipitates. The growth mechanism of ZnO nanoparticles is based on primary particle (radius ≈ 1.5 nm) rotation inside the primary aggregate (radius |
| Databáze: | OpenAIRE |
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