Sol-gel synthesis and characterization of cubic bismuth zinc niobium oxide nanopowders


Autoria(s): Perenlei, Ganchimeg; Talbot, Peter C.; Martens, Wayde N.
Data(s)

05/11/2014

Resumo

Bismuth zinc niobium oxide (BZN) was successfully synthesized by a diol-based sol-gel reaction utilizing metal acetate and alkoxide precursors. Thermal analysis of a liquid suspension of precursors suggests that the majority of organic precursors decompose at temperatures up to 150°C, and organic free powders form above 350°C. The experimental results indicate that a homogeneous gel is obtained at about 200°C and then converts to a mixture of intermediate oxides at 350–400°C. Finally, single-phased BZN powders are obtained between 500 and 900°C. The degree of chemical homogeneity as determined by X-ray diffraction and EDS mapping is consistent throughout the samples. Elemental analysis indicates that the atomic ratio of metals closely matches a Bi1.5ZnNb1.5O7 composition. Crystallite sizes of the BZN powders calculated from the Scherrer equation are about 33–98 nm for the samples prepared at 500–700°C, respectively. The particle and crystallite sizes increase with increased sintering temperature. The estimated band gap of the BZN nanopowders from optical analysis is about 2.60–2.75 eV at 500-600°C. The observed phase formations and measured results in this study were compared with those of previous reports.

Formato

application/pdf

application/pdf

Identificador

http://eprints.qut.edu.au/78450/

Publicador

Hindawi Publishing Corporation

Relação

http://eprints.qut.edu.au/78450/1/Sol-Gel.pdf

http://eprints.qut.edu.au/78450/5/78450p.pdf

DOI:10.1155/2014/695973

Perenlei, Ganchimeg, Talbot, Peter C., & Martens, Wayde N. (2014) Sol-gel synthesis and characterization of cubic bismuth zinc niobium oxide nanopowders. Journal of Nanomaterials, 2014, Article ID 695973.

Direitos

Copyright 2014 Ganchimeg Perenlei et al.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Fonte

School of Chemistry, Physics & Mechanical Engineering; Institute for Future Environments; Science & Engineering Faculty

Palavras-Chave #030302 Nanochemistry and Supramolecular Chemistry #Sol-Gel #nanomaterials #catalyst #BZN #CARF
Tipo

Journal Article