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The effect of pH on the nucleation of titania by hydrolysis of TiCl 4
Author(s) -
Kotsyubynsky V. O.,
Myronyuk I. F.,
Myronyuk L. I.,
Chelyadyn V. L.,
Mizilevska M. H.,
Hrubiak A. B.,
Tadeush O. K.,
Nizamutdinov F. M.
Publication year - 2016
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201600491
Subject(s) - brookite , anatase , rutile , nucleation , hydrolysis , titanium tetrachloride , precipitation , titanium dioxide , chemistry , inorganic chemistry , titanium , chemical engineering , phase (matter) , materials science , organic chemistry , physics , photocatalysis , meteorology , engineering , catalysis
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 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.
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