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Synthesis of homogeneously dispersed cobalt nanoparticles in the pores of functionalized SBA-15 silica
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Nanostructured Materials, Department of Physics, Chemistry and Biology, Linköping University.
Nanostructured Materials, Department of Physics, Chemistry and Biology, Linköping University.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-3661-9262
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2012 (English)In: Powder Technology, ISSN 0032-5910, E-ISSN 1873-328X, Vol. 221, p. 359-364Article in journal (Refereed) Published
Abstract [en]

Cobalt nanoparticles were prepared at room temperature by reducing cobalt sulfate heptahydrate with sodium borohydride using functionalized SBA-15 mesoporous silica as a hard template. It was found that both external and internal fuctionalization of silica walls play a crucial role on the infiltration and reaction of the reagents in the silica framework. Subsequent heat treatment of the impregnated silica at 500 °C in air or nitrogen atmospheres leads to growth of crystals of the deposited cobalt and formation of cobalt oxide and cobalt nanoparticles, respectively. Dissolution of the silica template by NaOH resulted in well dispersed Co and Co3O4 nanoparticles ranging in size between 2 and 4 nm. The functionalization of the silica was studied by FTIR, N2-physisorption, and thermogravimetric techniques and the obtained nanoparticles were characterized by XRD, TEM and EDX analysis.

Place, publisher, year, edition, pages
2012. Vol. 221, p. 359-364
National Category
Other Materials Engineering
Research subject
Engineering Materials
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URN: urn:nbn:se:ltu:diva-9097DOI: 10.1016/j.powtec.2012.01.025ISI: 000303222300046Scopus ID: 2-s2.0-84858624983Local ID: 7a897079-306e-4dc9-aa40-cc143f284e2eOAI: oai:DiVA.org:ltu-9097DiVA, id: diva2:982035
Note
Validerad; 2012; 20120126 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Escalera, EdwinAntti, Marta-LenaOdén, Magnus

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