The Effect of Chemical Modification of the Surface by Oxysilanes on Changes in the Structural and Phase States of Highly Porous Aluminum Oxyhydroxides at Annealing up to 1200°C

A. N. Khodan; Ходан А. Н.; A. V. Bykov; Быков А. В.; M. R. Kiselev; Киселев М. Р.

doi:10.31857/S0044185623700195

The Effect of Chemical Modification of the Surface by Oxysilanes on Changes in the Structural and Phase States of Highly Porous Aluminum Oxyhydroxides at Annealing up to 1200°C

Autores: Khodan A.N.¹^,2, Bykov A.V.³, Kiselev M.R.¹
Afiliações:
1. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 199071, Moscow, Russia
2. Derzhavin Tambov State University, 390000, Tambov, Russia
3. Moscow State University, 119991, Moscow, Russia
Edição: Volume 59, Nº 2 (2023)
Páginas: 161-166
Seção: НАНОРАЗМЕРНЫЕ И НАНОСТРУКТУРИРОВАННЫЕ МАТЕРИАЛЫ И ПОКРЫТИЯ
URL: https://cardiosomatics.ru/0044-1856/article/view/663848
DOI: https://doi.org/10.31857/S0044185623700195
EDN: https://elibrary.ru/SYSYRH
ID: 663848

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Resumo

Changes in the composition and physicochemical properties of porous monolithic 3D nanostructures of aluminum oxyhydroxides (porous monolithic aluminum oxides, PMAO) chemically modified in methyltrimethoxysilane vapors have been studied by thermal-analysis methods. The conditions of formation and compositions of organosilicon compounds on the PMAO surface have been determined, a high degree of hydrolysis (91%) of the alkoxy groups of the modifier during chemisorption has been confirmed. The dependence of the composition of the porous nanocomposite structure (Al2O3–SiO2) on the conditions of chemical and thermal treatment has been investigated. General changes in the chemical composition of the nanocomposite when using different annealing times in the range from 100 to 1200°C has been described.

Palavras-chave

nanomaterial, 3D nanostructure, aluminum hydroxides, chemical modification of the surface, thermal analysis

Bibliografia

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