The effect of pH on the nucleation of titania by hydrolysis of TiCl sub(4)

We have proposed and experimentally tested a phenomenological model of nucleation of a specific polymorphic phase of titanium dioxide (anatase, rutile, brookite) resulting from the interaction of Ti super(4+) hydroxocomplexes at different pH values of reaction medium. The degree of hydrolysis was de...

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Bibliographic Details
Published in:Materialwissenschaft und Werkstofftechnik 2016-03, Vol.47 (2-3), p.288-294
Main Authors: Kotsyubynsky, VO, Myronyuk, I F, Myronyuk, LI, Chelyadyn, V L, Mizilevska, M H, Hrubiak, AB, Tadeush, OK, Nizamutdinov, F M
Format: Article
Language:English
Subjects:
Anatase
Brookite
Hydrolysis
Nucleation
Rutile
Tetrachlorides
Titanium dioxide
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Summary:We have proposed and experimentally tested a phenomenological model of nucleation of a specific polymorphic phase of titanium dioxide (anatase, rutile, brookite) resulting from the interaction of Ti super(4+) hydroxocomplexes at different pH values of reaction medium. The degree of hydrolysis was determined as a function of pH for the monomers formed during the hydrolysis of titanium tetrachloride. Mixtures of anatase and brookite with an average size of coherently scattering domains of 5 nm and particles of ellipsoidal shape were obtained by precipitation at pH = 8. At the same time, nanoparticles of rutile with rod-like morphology and an average size of 10 nm were obtained at a pH = 1.
ISSN:0933-5137
1521-4052
DOI:10.1002/mawe.201600491