Abstract
Nanodisperse TiO2 hydrosol and two of its fractions stabilized by HCl are studied. The anatase nanocrystalline fractions are obtained by the stepped coagulation of the stable sol using dependence of coagulation thresholds on size of nanocrystallites. X-Ray investigation in small and wide angles of scattering has revealed that the anatase nanocrystallites have a shape of 2.5–3 nm thick elongated plates with 8–18 nm lateral sizes. The concentrated hydrosols with the reduced HCl content prepared from the anatase fractions are shown to form an ordered structure. Narrow fractions of TiO2 nanocrystallites obtained from the stable hydrosols seem to be promising for the preparation of highly ordered structures with a nanometer periodicity.
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