APTES-Based Silica Nanoparticles as a Potential Modifier for the Selective Sequestration of CO<sub>2</sub> Gas Molecules
In this work, we have described the characterization of hybrid silica nanoparticles of 50 nm size, showing outstanding size homogeneity, a large surface area, and remarkable CO<sub>2</sub> sorption/desorption capabilities. A wide battery of techniques was conducted ranging from spectrosc...
Guardado en:
| Autores principales: | , , , , , , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/1d90f3bf7b7d46a5a80271323757367e |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Sumario: | In this work, we have described the characterization of hybrid silica nanoparticles of 50 nm size, showing outstanding size homogeneity, a large surface area, and remarkable CO<sub>2</sub> sorption/desorption capabilities. A wide battery of techniques was conducted ranging from spectroscopies such as: UV-Vis and IR, to microscopies (SEM, AFM) and CO<sub>2</sub> sorption/desorption isotherms, thus with the purpose of the full characterization of the material. The bare SiO<sub>2</sub> (50 nm) nanoparticles modified with 3-aminopropyl (triethoxysilane), APTES@SiO<sub>2</sub> (50 nm), show a remarkable CO<sub>2</sub> sequestration enhancement compared to the pristine material (0.57 vs. 0.80 mmol/g respectively at 50 °C). Furthermore, when comparing them to their 200 nm size counterparts (SiO<sub>2</sub> (200 nm) and APTES@SiO<sub>2</sub> (200 nm)), there is a marked CO<sub>2</sub> capture increment as a consequence of their significantly larger micropore volume (0.25 cm<sup>3</sup>/g). Additionally, ideal absorbed solution theory (IAST) was conducted to determine the CO<sub>2</sub>/N<sub>2</sub> selectivity at 25 and 50 °C of the four materials of study, which turned out to be >70, being in the range of performance of the most efficient microporous materials reported to date, even surpassing those based on silica. |
|---|