Sorption Capacity of Synthetic Aluminosilicates of the Kaolinite Group of Various Morphology

Hydrosilicates of the kaolinite group (Al 2 Si 2 O 5 (OH) 4 · n H 2 O) with spherical, nanotubular, and platy particle shapes are synthesized in hydrothermal conditions. The morphology and size of the particles, as well as the porous-textural characteristics, are studied by scanning electron microsc...

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Bibliographic Details
Published in:Glass physics and chemistry 2021, Vol.47 (1), p.42-48
Main Authors: Alikina, Yu. A., Kalashnikova, T. A., Golubeva, O. Yu
Format: Article
Language:English
Subjects:
Aluminosilicates
Aluminum silicates
Analogs
Aqueous solutions
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Glass
Kaolinite
Low temperature
Materials Science
Methylene blue
Morphology
Natural Materials
Physical Chemistry
Porosity
Sorbents
Sorption
Subgroups
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Summary:Hydrosilicates of the kaolinite group (Al 2 Si 2 O 5 (OH) 4 · n H 2 O) with spherical, nanotubular, and platy particle shapes are synthesized in hydrothermal conditions. The morphology and size of the particles, as well as the porous-textural characteristics, are studied by scanning electron microscopy (SEM) and low-temperature nitrogen absorption. The sorption capacity of the samples relative to the cationic and anionic dyes is investigated on the example of methylene blue and carmoisine. A comparative analysis is conducted for the characteristics of synthetic aluminosilicates and their natural analogs: nanotubular halloysite and kaolinite with platy particles. It is shown that characteristics such as porosity (diameter and volume of pores) and the specific surface area (from 11 m 2 /g for platy to 470 m 2 /g for spherical particles) can differ among kaolinite subgroup aluminosilicates having a different morphology. It is shown that the synthetic aluminosilicate with spherical particles ( d av = 300 nm) is an effective universal sorbent of differently charged ions from aqueous solutions and its characteristics are better than for structural analogs and synthetic aluminosilicates of a different morphology.
ISSN:1087-6596
1608-313X
DOI:10.1134/S1087659621010028