Issue 44, 2012
From the journal:

Journal of Materials Chemistry

Bottom-up/top-down synthesis of stable zirconium hydroxide nanophases†

Moira Ambrosi,a   Emiliano Fratini,a   Patrizia Canton,b   Stephan Dankesreiterc  and  Piero Baglioni*a  

* Corresponding authors

a Department of Chemistry and CSGI, University of Florence, 50019 Sesto Fiorentino, Florence, Italy
E-mail: piero.baglioni@unifi.it
Fax: +39 055 4573036
Tel: +39 055 4573033

b Department of Molecular Sciences and Nanosystems, 30170 Venezia Mestre, Italy

c Department of Inorganic Chemistry, 93040 Regensburg, Germany

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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Article information

DOI
https://doi.org/10.1039/C2JM34111E
Article type
Paper
Submitted
25 Jun 2012
Accepted
17 Sep 2012
First published
19 Sep 2012

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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