Formation of grafted surface layers on silicon dioxide particles and their investigation by means of thermoprogrammed oxidation
- Авторы: Aleksandrova E.O.1, Novichkov R.V.1, Olenin A.Y.2,3, Zuev B.K.1,2
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Учреждения:
- Dubna International University of Nature, Society, and Man
- Vernadsky Institute of Geochemistry and Analytical Chemistry
- Department of Chemistry
- Выпуск: Том 91, № 3 (2017)
- Страницы: 555-558
- Раздел: Physical Chemistry of Nanoclusters and Nanomaterials
- URL: https://journals.rcsi.science/0036-0244/article/view/169351
- DOI: https://doi.org/10.1134/S0036024417030013
- ID: 169351
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Аннотация
Silica nanoparticles are obtained according to the Stober–Fink–Bohn method, and their surfaces are chemically modified with 1H,1H,2H,2H-perfluorodecyltriethoxysilane. It is estimated that sols of porous silica nanoparticles (average sizes, 50–200 nm) form during primary chemical process; the average size of the particles can be increased to 400–500 nm by consecutive growth. Oxythermography (thermoprogrammed oxidation) measurements reveal a stepped dependence between the content of organic substance of nanoparticles and the duration of chemical modification reaction exists. It is concluded that this could be due to the formation of dense shell (or shells) as a result of sols aging between the cycles of growth; such shells impose diffusive restrictions when molecules penetrate into the pores of the internal volume of the particles.
Об авторах
E. Aleksandrova
Dubna International University of Nature, Society, and Man
Email: zubor127@yandex.ru
Россия, Dubna, 141982
R. Novichkov
Dubna International University of Nature, Society, and Man
Email: zubor127@yandex.ru
Россия, Dubna, 141982
A. Olenin
Vernadsky Institute of Geochemistry and Analytical Chemistry; Department of Chemistry
Email: zubor127@yandex.ru
Россия, Moscow, 119991; Moscow, 119991
B. Zuev
Dubna International University of Nature, Society, and Man; Vernadsky Institute of Geochemistry and Analytical Chemistry
Автор, ответственный за переписку.
Email: zubor127@yandex.ru
Россия, Dubna, 141982; Moscow, 119991
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