Peroxide-based route for the synthesis of zinc titanate powder
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Date
2016
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
In this work the thermodynamical solubility diagrams of zinc and titanium hydroxides
were reviewed in order to determine the conditions for maximum degree of phase composition
homogenization of precipitates. Experimental investigation of dependency of titanium peroxohydroxide
solubility on solution acidity has been carried out and coprecipitation of zinc ions has been
studied. It was concluded that precipitation by constant addition of mixed salts and base solutions
into the mother liquor with constant acidity of pH 8.5 allows maximizing homogenization of
precipitate composition. Thermal treatment process of mixed zinc and titanium hydroxides
coprecipitated with hydrogen peroxide was studied using thermogravimetric analysis, differential
thermal analysis and X-ray diffraction methods. It was found that precipitates of co-precipitated
mixtures of zinc and titanium hydroxides contained impurities of salts precursors of the Zn
(NO3)2 and TiOCl2 at a level of 1%. The experimental data demonstrate the influence of hydrogen
peroxide on crystal growth rate of the zinc titanate during thermal treatment. The temperature
ranges and kinetic parameters of hydroxide mixture dehydration, decomposition of the titanium
peroxohydroxide and precursor impurities were determined.
Description
Keywords
Zinc nitrate, Titanium oxychloride, Titanium peroxohydroxide, Zinc titanate, Chemical precipitation
Citation
Nikolenko, N., Kalashnykova, A., Solovov, V., Kostyniuk, A., Bayahia, H., & Goutenoire, F. (2018). Peroxide-based route for the synthesis of zinc titanate powder. Arabian Journal Of Chemistry, 11(7), 1044-1052. doi: 10.1016/j.arabjc.2016.06.018