Adsorptive Properties of Template-Containing Silica-Based MCM-41 and MCM-50 Materials

Bobonich, F. M.; Коваленко, А. С.; Voloshina, Yu. G.; Korchev, Yuri E.; Solomakha, V. N.; Philippov, A.P.; Il’in, V. G.

doi:10.1260/026361702321039528

Cited by 4 publications

(2 citation statements)

References 8 publications

(14 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The silica source/surfactant ratio is the critical factor determining a type of porous structure. Preparation of the cubic (MCM-48) and lamellar structures (MCM-50) requires values of this ratio in the range of 0.65–1.5 or 0.5–0.83, respectively [ 8 , 9 ]. Due to the lamellar structure, MCM-50 shows very poor hydrothermal stability, and thus during the removal of the template, its pore walls collapse, resulting in a limited specific surface area of the final product.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the lamellar structure, MCM-50 shows very poor hydrothermal stability, and thus during the removal of the template, its pore walls collapse, resulting in a limited specific surface area of the final product. The MCM-50 quality can be improved by the appropriate selection of reagents and experimental parameters of their synthesis (raising the temperature and pH reaction system, extending reaction time, and using surfactants with loner alkyl chains and silica precursors at higher concentrations compared to those in the MCM-41 preparation procedure) [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Structure of Ordered Mesoporous Materials Synthesized from Aluminum Phyllosilicate Clay (Bentonite)

et al. 2023

View full text Add to dashboard Cite

This paper reports the synthesis and structural analysis of mesoporous silica materials with the use of aluminum phyllosilicate clay (bentonite) as an alternative silica source. In the proposed synthesis, bentonite, as natural aluminosilicate, was used instead of commercially available and quite expensive tetraethyl orthosilicate (TEOS) silica source. The objective of the research study was to determine the effect of aluminum loading in the mesoporous silica body for ordering structure, porosity, and potential sorption capacity to thorium ions. The unique direction developed in this procedure is focused on preparing advanced materials from natural sources with their own desired functionality and general availability. The applied procedure based on the classic, one-step synthesis of SBA-15 silicates was modified by gradually increasing the bentonite amount with simultaneous reduction of the TEOS content. The structural and morphological characterization, as well as evaluation of the porous structure of the obtained materials, was performed using powder wide-angle X-ray diffraction (XRD), small-angle scattering (SAXS), transmission and scanning electron microscopy (TEM, SEM), low-temperature nitrogen adsorption–desorption methods and potentiometric titration. The new, cost-effective composites for the removal of Th(IV) ions are proposed. The synergistic effect of expanding the porous surface using bentonite as a silica precursor and the presence of thorium-binding groups (such as Al2O3) is indicated.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%