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

A. N. Pavlenko; V. V. Yanishpolskii; V. A. Tertykh; V. G. Il'in; R. Leboda; J. Skubiszewska-Zieba

A. N. Pavlenko Інститут хімії поверхні НАН України
V. V. Yanishpolskii Інститут хімії поверхні НАН України
V. A. Tertykh Інститут хімії поверхні НАН України
V. G. Il'in L.V.Pisarzhevsky Institute of Physical Chemistry of National Academy of Sciences
R. Leboda Maria Curie-Sklodowska University
J. Skubiszewska-Zieba Maria Curie-Sklodowska University

Анотація

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.

Посилання

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