Deposition of Au nanoparticles into mesoporous SiO2 SBA-15

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dc.contributor.authorHuerta, Andrea
dc.contributor.authorTorralvo Fernández, María Josefa
dc.contributor.authorTenorio, María José
dc.contributor.authorPérez Velilla, Eduardo
dc.contributor.authorBermúdez, Jonathan
dc.contributor.authorCalvo Garrido, María Lourdes
dc.contributor.authorCabañas Poveda, Albertina
dc.date.accessioned2024-01-30T10:03:32Z
dc.date.available2024-01-30T10:03:32Z
dc.date.issued2022
dc.description.abstractAu/SiO2 SBA-15 materials were prepared using supercritical CO2 (scCO2) and by wet impregnation. First, SiO2 SBA-15 was functionalized with thiol groups at different grafting densities using 3-(Mercaptopropyl)trimethoxysilane dissolved in scCO2. The support was then impregnated with HAuCl4·3H2O in scCO2 modified with EtOH. Wet impregnation of the supports with HAuCl4·3H2O in ethanol was also performed. Materials were calcined at 500 °C to remove the organic matter and promote particle growth. Materials prepared on the highest thiol grafting density support showed Au NP between 2.5 and 5 nm homogeneously distributed within the mesopores. Slightly larger Au NPs were obtained in scCO2 modified with EtOH. Materials prepared on the low thiol grafting density support showed a bimodal particle size distribution with particles up to 7 nm located inside the mesopores and larger ones of 10–20 nm on the external surface. A possible reaction mechanism was proposed. These materials can be used in catalysis, sensing and biomedicine.
dc.description.departmentDepto. de Ingeniería Química y de Materiales
dc.description.facultyFac. de Ciencias Químicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Ciencia e Innovación (España)
dc.description.statuspub
dc.identifier.citationHuerta, Andrea, et al. «Deposition of Au Nanoparticles into Mesoporous SiO2 SBA-15». The Journal of Supercritical Fluids, vol. 184, mayo de 2022, p. 105582. https://doi.org/10.1016/j.supflu.2022.105582.
dc.identifier.doi10.1016/j.supflu.2022.105582
dc.identifier.officialurlhttps://www.doi.org/10.1016/j.supflu.2022.105582
dc.identifier.urihttps://hdl.handle.net/20.500.14352/96377
dc.journal.titleThe Journal of Supercritical Fluids
dc.language.isoeng
dc.page.initial105582
dc.publisherElsevier
dc.relation.projectIDRTI2018- 097230-B-100
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.accessRightsopen access
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.cdu66.0
dc.subject.ucmIngeniería química
dc.subject.unesco3303 Ingeniería y Tecnología Químicas
dc.titleDeposition of Au nanoparticles into mesoporous SiO2 SBA-15
dc.typejournal article
dc.type.hasVersionVoR
dc.volume.number184
dspace.entity.typePublication
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relation.isAuthorOfPublication08f9e67b-e7ba-420b-a651-37a03ba04f0c
relation.isAuthorOfPublication.latestForDiscovery3dbefa95-edab-433b-951f-82e8bea056e1
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