Low Temperature Synthesis of Several Titanium Dioxide Solid Solutions through the Sol-Gel Method

Titanium dioxide powders constituted by anatase single phase are very useful to understand several properties of that semiconductor applied as photocatalyst material. In addition, the reconstructive transformation involved in the anatase-to-rutile phase transition is also dependent of compositional...

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Published inOrbital : The Electronic Journal of Chemistry Vol. 10; no. 1 SI; pp. 66 - 71
Main Authors Amarante da Cruz, Natali, da Lopes dos Santos, Silvanice Apareci, Silva de Oliveira, Lincoln Carlos, Aparecido Ciola Amoresi, Rafael, Aparecida Zaghete, Maria, Goncalves Oliveira, Rony, da Cunha Andrade, Luis Humberto, Adriano Cavalheiro, Alberto
Format Journal Article
LanguageEnglish
Published Universidade Federal de Mato Grosso do Sul 01.01.2018
Subjects
anatase phase
Chemical properties
Chemical synthesis
composition design
ftir
Methods
Production processes
raman
Solid solutions
Titanium dioxide
xrd
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Summary:Titanium dioxide powders constituted by anatase single phase are very useful to understand several properties of that semiconductor applied as photocatalyst material. In addition, the reconstructive transformation involved in the anatase-to-rutile phase transition is also dependent of compositional and structural characteristics, which is consequence of the xerogel precursors. In this work, it was provided some structural investigation and the thermal event associated to different compositions of titanium dioxide xerogel samples obtained by Sol-Gel method. It was prepared two different doped-sample sets, one with bared titanium dioxide matrix and other with 10 mol% of zirconium-silicon one, and both sample sets were submitted to doping with 2 mol% of cation pairs, taking in account the ionic radii and oxidation states. The small and pentavalent vanadium cation was combined with trivalent and bigger lanthanum and bismuth ones, in order to provide non strained unit cell making an average values for ionic radii and oxidation states, taking in account the tetravalent titanium cation. By thermal analysis, X-ray diffractometry, FTIR and Raman spectroscopies it was possible to demonstrate the insertion of bigger dopants as lanthanum and bismuth, as well as the smaller one as vanadium, which are usually dopants not supported in isolated forms were successfully incorporated to anatase phase when combined as expected in previous composition design stage. Keywords: anatase phase; composition design; XRD; FTIR; raman
ISSN:1984-6428
1984-6428
DOI:10.17807/orbital.v10i1.1038