RAS Chemistry & Material ScienceЖурнал физической химии Russian Journal of Physical Chemistry

  • ISSN (Print) 0044-4537
  • ISSN (Online) 3034-5537

INFLUENCE OF STIRRING SPEED ON KINETIC AND MORPHOLOGICAL PARAMETERS OF GROWTH OF AMORPHOUS SILICA NANOSPHERES OBTAINED BY THE STOBER METHOD

PII
S3034553725090126-1
DOI
10.7868/S3034553725090126
Publication type
Article
Status
Published
Authors
Volume/ Edition
Volume 99 / Issue number 9
Pages
1387-1393
Abstract
Calorimetric and conductometric analysis methods in online mode for the synthesis of silica globules have been used. The dependence of the initial reaction rate of sol synthesis on the stirring rate of the reaction mixture was obtained. The stirring regions corresponding to diffusive and kinetic character of synthesis at the ratio of components Si(OH) : HO : NHHO – 0.2 : 18.9 : 2.0 (mol l) have been revealed. The kinetic region lies in the stirring frequency range of 7–23 Hz, which is characterized by a constant process rate and quality of the grown nanospheres, and the diffusive one up to 7 Hz with varying synthesis parameters. SEM-photographs of samples with determination of average sizes and deviation of sizes at different stirring speeds were analyzed. Morphological defects of nanospheres grown in the diffusion synthesis mode have been observed.
Keywords
кинетическая кривая термический анализ наносферы SiO скорость перемешивания кинетический режим
Date of publication
13.03.2026
Year of publication
2026
Number of purchasers
0
Views
33

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