Rattle-Type Diamine-Functionalized Mesoporous Silica Sphere for Carbon Dioxide Adsorption

Abstract

A rattle-type diamine-functionalized mesoporous silica sphere (DA-RMSS) was fabricated stepwise using a self-templating method through cationic surfactant assisted selective etching strategy. The rattle-type morphology of the obtained DA-RMSS material was disclosed by transmission electron microscopy, while its chemical composition was characterized by CHN elemental analysis, Fourier transform infrared spectroscopy, and solid-state 29Si cross-polarization/magic-angle-spinning nuclear magnetic resonance spectroscopic measurement, which corroborates the successful formation of siloxane network and the incorporation of organic component. Moreover, nitrogen adsorption–desorption isotherm measurement was conducted to reveal that DA-RMSS possesses large Brunauer–Emmett–Teller (BET) specific surface area of 814 m2g–1, pore volume of 0.78 cm3g–1, and narrow pore size distribution centered at 3.0 nm. Furthermore, its uptake property on carbon dioxide was also investigated in this contribution.

Adsorptive removal of methylene blue from aqueous solution using coal fly ash-derived mesoporous silica material

“…FT-IR spectroscopy was used to investigate the chemical components of the synthesized CFA-MS. As shown in Figure 2(a), the absorption peaks emerged at 1069, 801 and 456 cm −1 corresponds to the asymmetric stretching, symmetric stretching and in-plane bending vibrations of Si–O–Si bond, respectively (Yuan et al., 2018). In addition, a weak peak located at 1630 cm −1 is due to the physically adsorbed water molecules.…”

Recent Advances in the Synthesis, Surface Modifications and Applications of Core‐Shell Magnetic Mesoporous Silica Nanospheres

“…Thus, the researchers combined the high storage capacity of the hollow core-shell MSNs with the high magnetization of the sandwichstructured core-shell Mag-MSNs to create one or more cavities between the outer shell and the inner solid core, called rattletype (or yolk/shell) core-shell Mag-MSNs (Figure 1d). In short, rattle-type core-shell Mag-MSNs are specific combinations of high surface area and magnetization properties [49,50] with the hollow structure between the core and the shell, which can be used as containers for adsorbents, [51,52] nanocatalysts [53,54] and drugs. [55,56] In this review, we will focus on the synthesis, surface modification, and application of four types of core-shell Mag-MSNs.…”