Impact of the production method and diagnostics conditions on the compositions and structure of nanodimensional anatase

Olesya Timaeva; Vladimir Nikolaichik; Roman Svetogorov; Galina Kuz’micheva

doi:10.1515/zkri-2019-0051

Article

Impact of the production method and diagnostics conditions on the compositions and structure of nanodimensional anatase

Olesya Timaeva , Vladimir Nikolaichik , Roman Svetogorov and Galina Kuz’micheva

Published/Copyright: April 18, 2020

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From the journal Zeitschrift für Kristallographie - Crystalline Materials Volume 235 Issue 4-5

Abstract

The detail investigation of the samples with nanodimensional anatase, formed by hydrolysis of TiOSO₄ × xH₂O without or in the presence of polymer poly(N-vinyl caprolactam), physical precipitation of the polymer followed by the capture of commercial Hombifine N are performed by X-ray powder diffraction using laboratory and synchrotron radiation sources, transmission electron microscopy with the diffraction, and elemental analysis. The two «core»-«shell» models with nanoparticles and their associates as a core can be applied to samples produced. The synchrotron and electron radiation change the degree of crystallinity and the imperfection of anatase, isolate of TiO_2−x(OH)_2x × yH₂O from the nanoparticle shell with a decrease in its thickness, lead to the anatase – rutile phase transition. The double diffraction effect on the appearance of kinematically forbidden reflections caused by the dynamic character of the electron diffraction. The photoactivity depends on microstructural characteristics (specific surface, nanoobjects sizes). The structure and elemental composition of nanoparticles (associates) affect antimicrobial activity against Staphylococcus aureus and Escherichia coli.

Keywords: core-shell particles; hydrides; nanostructures; X-ray diffraction

Acknowledgements

This work saw supported by the Ministry of Education and Science of the Russian Federation for support of this work (No. 4.1069.2017/PCh, State Task No. 075-00475-19-00).

Conflicts of interest: None.

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Received: 2019-10-02

Accepted: 2020-03-22

Published Online: 2020-04-18

Published in Print: 2020-05-26

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Articles in the same Issue

https://doi.org/10.1515/zkri-2019-0051

Keywords for this article

core-shell particles; hydrides; nanostructures; X-ray diffraction