Insight into the Molecular Self-Assembly and Structural Organization of Mesoporous Hybrid Silica Films with Binary Composition

Kusz, Jakub; Boissiere, Cédric; Ihiawakrim, Dris; Ersen, Ovidiu; Sanchez, Clément; Parola, Stephane

doi:10.1021/acs.chemmater.3c01438

Cited by 2 publications

(1 citation statement)

References 62 publications

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“…Mesoporous silica is widely utilized in catalysis [1,2], bioengineering [3,4], medical [5,6], and environmental [7,8] applications due to its adjustable pore size, high specific surface area, and easy surface hydroxyl group functionalization. Currently, mesoporous silica materials with the film [9][10][11], fiber [12,13], spherical [4,14], core-shell [15,16], and ellipsoid [17] morphologies can be obtained by controlling the synthesis conditions. Among them, spherical mesoporous silica particles have been used in various applications such as biomedicine [5,6], chromatography [18][19][20][21], and catalysis [3,22,23] due to their advantages of favorable monodispersity, regular morphology, and easily tunable pore and particle sizes.…”

Section: Introductionmentioning

confidence: 99%

Effects of synthesis conditions on particle size and pore size of spherical mesoporous silica

Xu,

Meng,

Zhang

et al. 2024

Mater. Res. Express

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The particle size and pore size of spherical mesoporous silica materials play significant roles in their application. However, relatively limited systematic research has been conducted on how preparation conditions influence these properties. In particular, the effects of some important factors have not been adequately studied, including reaction time, reaction temperature, and organic solvent type. In this work, octane and water were used as solvents, and tetraethyl orthosilicate was used as the silicon source to systematically study the effects of reaction time, reaction temperature, different organic solvents, octane/water mass ratio, styrene template concentration, and surfactant (cetyltrimethylammonium bromide, CTAB)/H2O mass ratio on the particle morphology, particle size, and pore size of silica. The results suggest that the above-mentioned neglected factors exert a substantial influence on both particle size and pore size. In the experimental temperature range, the pore diameter decreases and the particle size increases with increasing temperature. The maximum particle size and pore size are achieved after a reaction time of 3 h, and a further increase in reaction time leads to a smaller particle size and pore size. As the number of carbon atoms in the organic solvent decreases, the pore size also gradually increases. Styrene and organic solvents that dissolve in CTAB micelles are crucial factors in pore formation, while the aggregation of the swollen CTAB micelles influences the particle size. The changes in the pore structure stability and hydroxyl density of the synthesized samples in water were also studied. After undergoing water treatment at temperatures ranging from 20 to 60 ℃ for 72 h, both the pore structure and morphology remain relatively unchanged. When the temperature increases, the surface hydroxyl density exhibits a more pronounced increase in the presence of water. After water treatment for 5 h, the surface hydroxyl density reaches saturation.

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