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...

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Autores principales:	Eduardo J. Cueto-Díaz, Alberto Castro-Muñiz, Fabián Suárez-García, Santos Gálvez-Martínez, Mª Carmen Torquemada-Vico, Mª Pilar Valles-González, Eva Mateo-Martí
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	functional silica nanoparticles CO<sub>2</sub> adsorption CO<sub>2</sub>/N<sub>2</sub> selectivity hybrid nanomaterials surface spectroscopies Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/1d90f3bf7b7d46a5a80271323757367e
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spelling	oai:doaj.org-article:1d90f3bf7b7d46a5a80271323757367e2021-11-25T18:30:39ZAPTES-Based Silica Nanoparticles as a Potential Modifier for the Selective Sequestration of CO<sub>2</sub> Gas Molecules10.3390/nano111128932079-4991https://doaj.org/article/1d90f3bf7b7d46a5a80271323757367e2021-10-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/2893https://doaj.org/toc/2079-4991In 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.Eduardo J. Cueto-DíazAlberto Castro-MuñizFabián Suárez-GarcíaSantos Gálvez-MartínezMª Carmen Torquemada-VicoMª Pilar Valles-GonzálezEva Mateo-MartíMDPI AGarticlefunctional silica nanoparticlesCO<sub>2</sub> adsorptionCO<sub>2</sub>/N<sub>2</sub> selectivityhybrid nanomaterialssurface spectroscopiesChemistryQD1-999ENNanomaterials, Vol 11, Iss 2893, p 2893 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	functional silica nanoparticles CO<sub>2</sub> adsorption CO<sub>2</sub>/N<sub>2</sub> selectivity hybrid nanomaterials surface spectroscopies Chemistry QD1-999
spellingShingle	functional silica nanoparticles CO<sub>2</sub> adsorption CO<sub>2</sub>/N<sub>2</sub> selectivity hybrid nanomaterials surface spectroscopies Chemistry QD1-999 Eduardo J. Cueto-Díaz Alberto Castro-Muñiz Fabián Suárez-García Santos Gálvez-Martínez Mª Carmen Torquemada-Vico Mª Pilar Valles-González Eva Mateo-Martí APTES-Based Silica Nanoparticles as a Potential Modifier for the Selective Sequestration of CO<sub>2</sub> Gas Molecules
description	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.
format	article
author	Eduardo J. Cueto-Díaz Alberto Castro-Muñiz Fabián Suárez-García Santos Gálvez-Martínez Mª Carmen Torquemada-Vico Mª Pilar Valles-González Eva Mateo-Martí
author_facet	Eduardo J. Cueto-Díaz Alberto Castro-Muñiz Fabián Suárez-García Santos Gálvez-Martínez Mª Carmen Torquemada-Vico Mª Pilar Valles-González Eva Mateo-Martí
author_sort	Eduardo J. Cueto-Díaz
title	APTES-Based Silica Nanoparticles as a Potential Modifier for the Selective Sequestration of CO<sub>2</sub> Gas Molecules
title_short	APTES-Based Silica Nanoparticles as a Potential Modifier for the Selective Sequestration of CO<sub>2</sub> Gas Molecules
title_full	APTES-Based Silica Nanoparticles as a Potential Modifier for the Selective Sequestration of CO<sub>2</sub> Gas Molecules
title_fullStr	APTES-Based Silica Nanoparticles as a Potential Modifier for the Selective Sequestration of CO<sub>2</sub> Gas Molecules
title_full_unstemmed	APTES-Based Silica Nanoparticles as a Potential Modifier for the Selective Sequestration of CO<sub>2</sub> Gas Molecules
title_sort	aptes-based silica nanoparticles as a potential modifier for the selective sequestration of co<sub>2</sub> gas molecules
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/1d90f3bf7b7d46a5a80271323757367e
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APTES-Based Silica Nanoparticles as a Potential Modifier for the Selective Sequestration of CO<sub>2</sub> Gas Molecules

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