CO2 adsorption by amino-functionalized graphene-silica gels

This work evaluates the CO2-adsorption relevance and cycling stability of graphene oxide-silica (GO-SiO2) and reduced graphene oxide-silica (rGO-SiO2) gels after amine functionalization, demonstrating high-capacity retention under repeated adsorption-desorption cycles: rGO-SiO2-APTMS retains =96.3%...

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Detalles Bibliográficos
Autores: González Barriuso, Marina|||0000-0002-0816-7572, Yedra Martínez, Ángel, Blanco Delgado, Carmen
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/38288
Acceso en línea:https://hdl.handle.net/10902/38288
Access Level:acceso abierto
Palabra clave:Graphene
Graphene oxide
Mesostructure
Silica gels
Sol–gel
Amine functionalization
Surfactant removal
CO2 capture
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spelling CO2 adsorption by amino-functionalized graphene-silica gelsGonzález Barriuso, Marina|||0000-0002-0816-7572Yedra Martínez, ÁngelBlanco Delgado, CarmenGrapheneGraphene oxideMesostructureSilica gelsSol–gelAmine functionalizationSurfactant removalCO2 captureThis work evaluates the CO2-adsorption relevance and cycling stability of graphene oxide-silica (GO-SiO2) and reduced graphene oxide-silica (rGO-SiO2) gels after amine functionalization, demonstrating high-capacity retention under repeated adsorption-desorption cycles: rGO-SiO2-APTMS retains =96.3% of its initial uptake after 50 cycles, while GO-SiO2-APTMS retains =90.0%. The use of surfactants to control the organization of inorganic and organic molecules has enabled the development of ordered mesostructures, such as mesoporous silica and organic/inorganic nanocomposites. Owing to the outstanding properties of graphene and its derivatives, synthesizing mesostructures intercalated between graphene sheets offers nanocomposites with novel morphologies and enhanced functionalities. In this study, GO-SiO2 and rGO-SiO2 gels were synthesized and characterized by X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetric analysis (TG), mass spectrometry (MS), N2 adsorption-desorption isotherms, and transmission electron microscopy (TEM). The resulting materials exhibit a laminar architecture, with mesoporous silica domains grown between graphene-based layers; the silica contents are 83.6% and 87.6%, and the specific surface areas reach 446 and 710 m2·g-1, respectively. The laminar architecture is retained regardless of the surfactant-removal route; however, in GO-SiO2 obtained by solvent extraction, a fraction of the surfactant remains partially trapped. Together with their high surface area, hierarchical porosity, and amenability to surface functionalization, these features establish amine-grafted graphene-silica gels, particularly rGO-SiO2-APTMS, as promising CO2-capture adsorbents.This work was supported by the funding of the Margarita Salas Grant for the Training of Young Doctors 2021–2023 of the University of Cantabria.MDPIUniversidad de Cantabria20252025-09-01journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttps://hdl.handle.net/10902/38288Gels, 2025, 11(9), 702reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/382882026-06-02T12:39:31Z
dc.title.none.fl_str_mv CO2 adsorption by amino-functionalized graphene-silica gels
title CO2 adsorption by amino-functionalized graphene-silica gels
spellingShingle CO2 adsorption by amino-functionalized graphene-silica gels
González Barriuso, Marina|||0000-0002-0816-7572
Graphene
Graphene oxide
Mesostructure
Silica gels
Sol–gel
Amine functionalization
Surfactant removal
CO2 capture
title_short CO2 adsorption by amino-functionalized graphene-silica gels
title_full CO2 adsorption by amino-functionalized graphene-silica gels
title_fullStr CO2 adsorption by amino-functionalized graphene-silica gels
title_full_unstemmed CO2 adsorption by amino-functionalized graphene-silica gels
title_sort CO2 adsorption by amino-functionalized graphene-silica gels
dc.creator.none.fl_str_mv González Barriuso, Marina|||0000-0002-0816-7572
Yedra Martínez, Ángel
Blanco Delgado, Carmen
author González Barriuso, Marina|||0000-0002-0816-7572
author_facet González Barriuso, Marina|||0000-0002-0816-7572
Yedra Martínez, Ángel
Blanco Delgado, Carmen
author_role author
author2 Yedra Martínez, Ángel
Blanco Delgado, Carmen
author2_role author
author
dc.contributor.none.fl_str_mv Universidad de Cantabria
dc.subject.none.fl_str_mv Graphene
Graphene oxide
Mesostructure
Silica gels
Sol–gel
Amine functionalization
Surfactant removal
CO2 capture
topic Graphene
Graphene oxide
Mesostructure
Silica gels
Sol–gel
Amine functionalization
Surfactant removal
CO2 capture
description This work evaluates the CO2-adsorption relevance and cycling stability of graphene oxide-silica (GO-SiO2) and reduced graphene oxide-silica (rGO-SiO2) gels after amine functionalization, demonstrating high-capacity retention under repeated adsorption-desorption cycles: rGO-SiO2-APTMS retains =96.3% of its initial uptake after 50 cycles, while GO-SiO2-APTMS retains =90.0%. The use of surfactants to control the organization of inorganic and organic molecules has enabled the development of ordered mesostructures, such as mesoporous silica and organic/inorganic nanocomposites. Owing to the outstanding properties of graphene and its derivatives, synthesizing mesostructures intercalated between graphene sheets offers nanocomposites with novel morphologies and enhanced functionalities. In this study, GO-SiO2 and rGO-SiO2 gels were synthesized and characterized by X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetric analysis (TG), mass spectrometry (MS), N2 adsorption-desorption isotherms, and transmission electron microscopy (TEM). The resulting materials exhibit a laminar architecture, with mesoporous silica domains grown between graphene-based layers; the silica contents are 83.6% and 87.6%, and the specific surface areas reach 446 and 710 m2·g-1, respectively. The laminar architecture is retained regardless of the surfactant-removal route; however, in GO-SiO2 obtained by solvent extraction, a fraction of the surfactant remains partially trapped. Together with their high surface area, hierarchical porosity, and amenability to surface functionalization, these features establish amine-grafted graphene-silica gels, particularly rGO-SiO2-APTMS, as promising CO2-capture adsorbents.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025-09-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10902/38288
url https://hdl.handle.net/10902/38288
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv Gels, 2025, 11(9), 702
reponame:UCrea Repositorio Abierto de la Universidad de Cantabria
instname:Universidad de Cantabria (UC)
instname_str Universidad de Cantabria (UC)
reponame_str UCrea Repositorio Abierto de la Universidad de Cantabria
collection UCrea Repositorio Abierto de la Universidad de Cantabria
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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