Title: A non-thermal route to oxide nanocomposites by mechanochemical redox reactions

Authors: Vladimir Šepelák; Tatyana Fedorovna Grigoryeva

Addresses: Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany; Slovak Academy of Sciences, Watsonova 45, SK-04353 Košice, Slovakia ' Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, Kutateladze 18, 630128 Novosibirsk, Russia

Abstract: Chemical reduction-oxidation (redox) processes induced by mechanical treatment represent an important class of solid-state reactions. In the present work, selected examples are presented of the preparation of nanocomposites by mechanochemical redox reactions, starting from simple binary or complex ternary oxides. The important impact of the work, from the methodology point of view, is the application of ⁵⁷Fe and ¹¹⁹Sn Mössbauer spectroscopies to the study of the mechanically induced formation of Fe- and Sn-containing composites. In addition, the obtained nanocomposites are characterised by X-ray diffraction and transmission electron microscopy. It is demonstrated that the event of mechanically induced redox reactions presents novel opportunities for the non-thermal manipulation of materials and provides a promising field for future fundamental as well as applied research.

Keywords: nanocomposites; non-thermal route; mechanochemistry; high-energy ball milling; redox reactions; ternary oxides; Mossbauer spectroscopy; local structure; X-ray diffraction; XRD; transmission electron microscopy; TEM; nanotechnology.

DOI: 10.1504/IJMPT.2014.064039

International Journal of Materials and Product Technology, 2014 Vol.49 No.2/3, pp.82 - 96

Received: 21 May 2013
Accepted: 05 Sep 2013
Published online: 30 Aug 2014 *

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