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Issue 24, 2014
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Rationale for the crystallization of titania polymorphs in solution

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Abstract

We use in situ X-ray absorption and diffraction studies to directly monitor the crystallization of different titania polymorphs in one and the same solution. We find that, despite the commonly accepted polymorphic-crossover from anatase to rutile triggered by the critical size of nanoparticles, in the solution their respective nucleation and growth are independent processes. Moreover, we find that 5.9 nm rutile nanoparticles are formed prior to the formation of 8.4 nm anatase nanoparticles. Our results suggest that the origins of this crystallization mechanism lie in the formation of an intermediate non-crystalline phase and in time-dependent changes in the chemical environment.

Graphical abstract: Rationale for the crystallization of titania polymorphs in solution

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Article information


Submitted
30 Jul 2014
Accepted
18 Sep 2014
First published
15 Oct 2014

Nanoscale, 2014,6, 14716-14723
Article type
Paper
Author version available

Rationale for the crystallization of titania polymorphs in solution

N. Kränzlin, M. Staniuk, F. J. Heiligtag, L. Luo, H. Emerich, W. van Beek, M. Niederberger and D. Koziej, Nanoscale, 2014, 6, 14716
DOI: 10.1039/C4NR04346D

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