Synthesis and physicochemical properties of silica gels with small additives of aluminium and zirconium ions

• Published in: Поверхность
• Date: 2002
• Main Author: Bondar, L.А.
• Format: Article
• Language: English
• Published: Інститут хімії поверхні ім. О.О. Чуйка НАН України 2002
• Subjects: Surface chemistry of silica and related sorbents
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/126349
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Synthesis and physicochemical properties of silica gels with small additives of aluminium and zirconium ions / L.А. Bondar // Поверхность. — 2002. — Вип. 7-8. — С. 26-34. — Бібліогр.: 17 назв. — англ.

The method of synthesis of silica gels containing small additives of Al and Zr ions was developed. The porous structure of the synthesized Al,Zr-silica gels has been characterized by the adsorption method. It was found that simultaneous modification of silica gels by aluminium and zirconium ions lead to the formation of micro- and ultramicroporous samples in neutral media of precipitation. The parameters of porous structure of Al,Zr-silica gels are considerably dependent on the modified ions contents. A supposition was made that the formation of porous structure was caused by mutual stabilizing effect of Al and Zr additives on silica gel globules growth at sol-gel stages of synthesis. The nature of surface active sites of the modified silica gels was studied by the diffuse-reflectance IR-spectroscopy with the use of adsorption of deuteroacetonitrile.