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Structural and morphological features of Al-SBA-15 composites
https://doi.org/10.18412/1816-0387-2025-6-3-11
Abstract
The study is dedicated to the synthesis and study of the physicochemical properties of a porous catalytic system based on mesoporous mesostructured silicate SBA-15. Aluminosilicate composites with SBA-15 mesostructure were synthesized by the method of co-condensation at a pH ~1.5 and an Al/Si molar ratio ranging from 2.5 to 35%. The obtained aluminosilicates have been characterized using X-ray diffraction, gas adsorption, IR spectroscopy, electron microscopy, and elemental analysis. With an increase in the Al/Si ratio during synthesis, there is a regular decrease in the unit cell parameter from 107.3 to 99.9 Å, specific surface area from 837 to 699 m²/g, and pore volume from 0.86 to 0.62 cm³/g. The incorporation of aluminum into the SBA-15 structure reaches 2.6%. Changes in the composition of the initial mixture significantly affect the morphology of the aluminosilicate particles; in particular, the thickness of the fiber-like particles increases while the length of the fibers remains practically unchanged. The thickened fibers are unstable, and at an Al/Si ratio in the initial composition of 35% mol., the composite particles are noticeably fragmented.
About the Authors
S. A. Novikova
Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk
Russian Federation
Russian Federation
A. O. Eremina
Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk
Russian Federation
Russian Federation
S. D. Kirik
Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk; Siberian Federal University, Krasnoyarsk
Russian Federation
Russian Federation
Y. N. Zaiceva
Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk
Russian Federation
Russian Federation
O. P. Taran
Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk; Siberian Federal University, Krasnoyarsk
Russian Federation
Russian Federation
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Review
For citations:
Novikova S.A., Eremina A.O., Kirik S.D., Zaiceva Y.N., Taran O.P. Structural and morphological features of Al-SBA-15 composites. Kataliz v promyshlennosti. 2025;25(6):3-11. (In Russ.) https://doi.org/10.18412/1816-0387-2025-6-3-11
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