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dc.contributor.author
Aspromonte, Soledad Guadalupe
dc.contributor.author
Sastre, Alvaro
dc.contributor.author
Boix, Alicia Viviana
dc.contributor.author
Cocero, María José
dc.contributor.author
Alonso, Esther
dc.date.available
2018-07-25T00:53:36Z
dc.date.issued
2012-01
dc.identifier.citation
Aspromonte, Soledad Guadalupe; Sastre, Alvaro; Boix, Alicia Viviana; Cocero, María José; Alonso, Esther; Cobalt nanoparticles on mesoporous MCM-41 and Al-MCM-41 by Supercritical CO2 Deposition; Elsevier Science; Microporous and Mesoporous Materials; 148; 1-2012; 53-61
dc.identifier.issn
1387-1811
dc.identifier.uri
http://hdl.handle.net/11336/53047
dc.description.abstract
CoO and Co3O4 nanoparticles were uniformly dispersed inside mesoporous MCM-41 and Al-MCM-41 supports using supercritical CO2 reactive deposition. This method represents a one-pot reproducible procedure that allows the dissolution of the organocobalt precursor and supports impregnation in supercritical CO2 at 70 °C and 110 bar, followed by the precursor thermal decomposition into cobalt species at 200 °C and 160 bar. By the relative concentration of the cobalt precursor [cobalt (II) bis (η5-ciclopentadienil)], the load of cobalt nanoparticles was controlled and then determined by Inductively Coupled Plasma (ICP-OES). The synthesis of CoO and Co3O4 species inside the MCM-41 and Al-MCM-41 substrates was confirmed by X-ray Photoelectron (XPS) and Laser Raman Spectroscopies (LRS). By N2 adsorption and Small Angle X-ray Scattering (SAXS), it was determined that the hexagonal arrangement as well as the surface area and pore size of the substrates changed after the addition of cobalt. By means of X-ray mapping from SEM images, a homogeneous distribution of cobalt nanoparticles was observed inside the mesopores when the cobalt loading was 1 wt.%. In addition, spherical cobalt nanoparticles of average diameter close to 20 nm were detected on the outer surface of MCM-41 and Al-MCM-41 supports when the cobalt content was higher. On the other hand, by Transmission Electron Microscopy (TEM), it was possible to measure the interplanar distance of the crystalline plane of the outer nanoparticles, which was later compared with the theoretical distance values which allowed identifying the CoO and Co3O4 phases.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Supercritical Co2
dc.subject
Cobalt Oxide Nanoparticles
dc.subject
Mcm-41
dc.subject
Al-Mcm-41 And Mesoporous Supports
dc.subject.classification
Otras Ciencias Químicas
dc.subject.classification
Ciencias Químicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Cobalt nanoparticles on mesoporous MCM-41 and Al-MCM-41 by Supercritical CO2 Deposition
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-07-20T14:18:03Z
dc.journal.volume
148
dc.journal.pagination
53-61
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Aspromonte, Soledad Guadalupe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentina
dc.description.fil
Fil: Sastre, Alvaro. Universidad de Valladolid; España
dc.description.fil
Fil: Boix, Alicia Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentina
dc.description.fil
Fil: Cocero, María José. Universidad de Valladolid; España
dc.description.fil
Fil: Alonso, Esther. Universidad de Valladolid; España
dc.journal.title
Microporous and Mesoporous Materials
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science?_ob=MiamiImageURL&_cid=271888&_user=3602825&_pii=S1387181111003295&_check=y&_origin=search&_zone=rslt_list_item&_coverDate=2012-01-15&wchp=dGLzVlk-zSkWz&md5=342b1a543f4ddde1d37e9ef372b9beed/1-s2.0-S1387181111003295-mai
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.micromeso.2011.07.014


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