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HomeMaterials Science ForumMaterials Science Forum Vol. 930Study of the Zirconium and Silicon Homovalent...

Study of the Zirconium and Silicon Homovalent Dopants Insertion on the Structure and Bandgap Energy of Titanium Dioxide Powders

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Abstract:

The reconstructive transformation occurring during the anatase-to-rutile phase transition can be observed through adequate techniques such as Thermal Analyses and Z-ray diffractometry followed by structural refinement. The typical photonic properties of titanium dioxide photocatalysts depend on the anatase structure and how the modifiers can provide their performance enhancement. In the present work, we investigate the structural effects caused by the simultaneous homovalent modification on the anatase structure in order to understand the mechanisms of the anatase-to-rutile phase transition in terms of the atomic coordinates and the lattice parameters. The refined structures along the calcination temperature from 500 to 900 oC suggest the oxygen bonds are strongly affected in unmodified anatase in order to destroy and rebuilt the crystal structure and lead to the rutile phase formation above 700 oC, unless some modifier pairs stabilize them.

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22nd Brazilian Conference on Materials Science and Engineering

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Periodical:

Materials Science Forum (Volume 930)

Pages:

67-72

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.930.67

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Online since:

September 2018

Authors:

Hiana Muniz Garcia, Eduardo Felipe de Carli, Natali Amarante da Cruz, Jusinei Meireles Stropa, Lis Regiane Vizolli Favarin, Amilcar Muchulek Junior, Lincoln Carlos Silva de Oliveira, Alberto Adriano Cavalheiro

Keywords:

Rietveld, Sol-Gel, Thermal Analysis, Titanium Dioxide Anatase

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© 2018 Trans Tech Publications Ltd. All Rights Reserved

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