Microwave-assisted and conventional hydrothermal synthesis of ordered mesoporous silicas with P-containing functionalities

Synthesis of mesoporous silica-tethered phosphonic acid sorbents for uranium species from aqueous solutions

“…chloride (NaCl, Aldrich, USA); and sodium bicarbonate (NaHCO 3 Aldrich, USA) were used as received in the synthesis and testing of P-containing mesoporous silica materials. Note that the above recipe is analogous to that reported in [29]; the difference is in the acidic conditions used. The samples synthesized in this work were prepared at lower pH (acetic acid) instead of HCl, which was used in [29].…”

“…Note that the above recipe is analogous to that reported in [29]; the difference is in the acidic conditions used. The samples synthesized in this work were prepared at lower pH (acetic acid) instead of HCl, which was used in [29].…”

“…Thus, an increase in the DPTS amount in the reaction mixture affects significantly the morphology of the synthesized samples. As compared to the morphology of the samples with similar composition, obtained in the presence of hydrochloric acid instead of acetic acid [29], one can argue that the acidity of the medium have a significant effect on the morphology of these materials. Therefore, even in the case of microwave-assisted synthesis the agglomeration of primary particles into a solid structure is not prevented.…”

Porous Ceramic Sensors: Hydrocarbon Gas Leaks Detection

“…Microwave-assisted hydrothermal methodology has allowed the preparation of mesoporous silica particles in shorter reaction time with similar structural and textural properties to those obtained by conventional hydrothermal route [22].…”

Synthesis and characterization of sulfur-containing hybrid materials based on sodium silicate

“…22 Positive experience in the synthesis of SBA-15 type materials based on metasilicate without a functional layer was described in papers, [23][24][25][26][27][28][29] and those with different types of functional groups in papers. [30][31][32][33][34][35] Based on the analysis of the literature data, the main conclusions about sulfonic acid catalysts can be summarized as follows: (a) the acidic and catalytic properties of materials synthesized in different ways are similar; (b) there is a relationship between the specic activity of the attached sulfonic acid groups and the concentration of these groups on the substrate surface. It is also possible to form clusters of interacting acid groups, with increasing concentration on the substrate.…”