Ambrosi, Moira and Fratini, Emiliano and Canton, Patrizia and Dankesreiter, Stephan and Baglioni, Piero (2012) Bottom-up/top-down synthesis of stable zirconium hydroxide nanophases. JOURNAL OF MATERIALS CHEMISTRY, 22 (44). pp. 23497-23505. ISSN 0959-9428, 1364-5501
Full text not available from this repository. (Request a copy)Abstract
It is well known that the structure of ZrO2 powder synthesized by low temperature calcination of hydrous zirconia is strongly affected by the nature and properties of precursors. In the present paper, we combined a precipitation/restructuring approach (bottom-up/top-down methodology) to produce zirconium hydroxide nanoparticles that transform into stable nanophasic tetragonal zirconia by low temperature calcination. The dimension and structure of precursors could be modulated by adjusting pH. The synthetic route was investigated by Raman spectroscopy, X-Ray Diffraction, Small-Angle X-Ray Scattering and High-Resolution Transmission Electron Microscopy. The zirconium hydroxide nanoparticles represent the final product of the overall process, which starts as a bottom-up synthesis of the hydroxide gel, followed by a top-down reorganization stage. During this rearrangement, the evolving structure passes through a mass fractal that arises from the clustering of the primary zirconium hydroxide nano-units.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SMALL-ANGLE SCATTERING; AQUEOUS-SOLUTIONS; HYDROUS ZIRCONIA; RAMAN; HYDROLYSIS; STABILIZATION; NANOPARTICLES; STABILITY; COMPLEX; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Arno Pfitzner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 04 May 2020 06:35 |
| Last Modified: | 04 May 2020 06:35 |
| URI: | https://pred.uni-regensburg.de/id/eprint/17734 |
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