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Targeted Synthesis of Nanostructured Oxide Materials

Published online by Cambridge University Press:  01 February 2011

Greta Ricarda Patzke  and
Ying Zhou
Greta Ricarda Patzke
Affiliation:
[email protected], University of Zurich, Institute of Inorganic Chemistry, Winterthurerstrasse 190, Zurich, CH-8057, Switzerland, 0041 44 635 4691, 0041 44 635 6802
Ying Zhou
Affiliation:
[email protected], University of Zurich, Institute of Inorganic Chemistry, Winterthurerstrasse 190, Zurich, CH-8057, Switzerland
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Abstract

Morphology control is a key challenge in the straightforward hydrothermal production of technologically relevant anisotropic oxide materials. The use of readily available ionic additives as growth modifiers is discussed and compared for molybdenum- and tungsten oxide-based systems, and it is extended upon the formation of ternary W/Mo-oxides. Generally, the one-step hydrothermal synthesis of ternary and higher oxides is an important goal, because their properties often outperform those of the binary oxides. This holds especially for the Bi2O3-MoO3-VOx (BIMOVOx) system as a rich source of new materials. We present a new solution-based approach to α-Bi2O3 nanobelts starting from commercial Bi2O3 and K2SO4 as a key step on the way to anisotropic BIMOVOx-oxides. This hydrothermal process is an illustrative example of highly selective and efficient morphology control through an inorganic additive. As mechanistic and kinetic studies are crucial for the design of complex oxide nanomaterials, the Bi2O3-K2SO4 system is compared to our previous studies on Mo-, W- and V-oxides with respect to its hydrothermal parameter window and robustness.

Keywords

oxidenanoscalehydrothermal
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1056: Symposium HH – Nanophase and Nanocomposite Materials V , 2007 , 1056-HH05-01
Copyright
Copyright © Materials Research Society 2008

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