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Issue 44, 2012
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Bottom-up/top-down synthesis of stable zirconium hydroxide nanophases

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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.

Graphical abstract: Bottom-up/top-down synthesis of stable zirconium hydroxide nanophases

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Publication details

The article was received on 25 Jun 2012, accepted on 17 Sep 2012 and first published on 19 Sep 2012


Article type: Paper
DOI: 10.1039/C2JM34111E
Citation: J. Mater. Chem., 2012,22, 23497-23505
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    Bottom-up/top-down synthesis of stable zirconium hydroxide nanophases

    M. Ambrosi, E. Fratini, P. Canton, S. Dankesreiter and P. Baglioni, J. Mater. Chem., 2012, 22, 23497
    DOI: 10.1039/C2JM34111E

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