Effect of precursor and surfactant nature on geometrical characteristics of mesoporous silicas

• Main Authors: Pavlenko, A.N., Yanishpolskii, V.V., Tertykh, V.A., Il'in, V.G., Leboda, R., Skubiszewska-Zieba, J.
• Format: Article
• Language: English
• Published: Інститут хімії поверхні ім. О.О. Чуйка НАН України 2002
• Series: Поверхность
• Subjects: Surface chemistry of silica and related sorbents
• Online Access: http://dspace.nbuv.gov.ua/handle/123456789/126348

Bimodal mesoporous silicas and materials MCM-41 type were synthesized with the use as a template cationic surfactants distinguished by a length of the alkyl chain. Fumed silica, tetraethyl orthosilicate as well as of mixture these compounds were applied as a silicate precursor. Obtained samples have been characterized by the powder X-ray diffraction technique and adsorption measurements. Specific surface area, pore diameter, pore size distribution was determined from nitrogen ad(de)sorption isotherms at 77 K for the silicas prepared. The products with bimodal pore distribution have not ordered structure and contain macropores and mesopores, whose sizes are typical for MCM-41 materials. Effect of surfactant and precursor nature on the geometrical features of the ordered structure of MCM-41 type and bimodal porous materials was studied.