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Synthesis of homoge...
Synthesis of homogeneously dispersed cobalt nanoparticles in the pores of functionalized SBA-15 silica
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- Escalera, Edwin (author)
- Luleå tekniska universitet,Materialvetenskap,Division of Engineering Materials, Department of Applied Physics and Mechanical Engineering, Luleå University of Technology, Luleå, Sweden.
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- Ballem, Mohamed A. (author)
- Linköpings universitet,Nanostrukturerade material,Tekniska högskolan,Nanostructured Materials, Department of Physics, Chemistry and Biology, Linköping University
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- Cordoba, José M. (author)
- Linköpings universitet,Nanostrukturerade material,Tekniska högskolan,Nanostructured Materials, Department of Physics, Chemistry and Biology, Linköping University
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- Antti, Marta-Lena (author)
- Luleå tekniska universitet,Materialvetenskap,Division of Engineering Materials, Department of Applied Physics and Mechanical Engineering, Luleå University of Technology, Luleå, Sweden
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- Odén, Magnus (author)
- Linköpings universitet,Nanostrukturerade material,Tekniska högskolan
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(creator_code:org_t)
- Elsevier, 2012
- 2012
- English.
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In: Powder Technology. - : Elsevier. - 0032-5910 .- 1873-328X. ; 221:S1, s. 359-364
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- Cobalt nanoparticles were prepared at room temperature by reducing cobalt sulfate heptahydrate with sodium borohydride and 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 and cobalt oxide nanoparticles, respectively. Dissolution of the silica template by NaOH resulted in well dispersed Co and Co3O4 nanoparticles ranging in size from 2 to 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.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
Keyword
- Functionalization; Cobalt; Cobalt oxide; Nanoparticles; SBA-15 silica; Sodium borohydride
- NATURAL SCIENCES
- NATURVETENSKAP
- Materialteknik
Publication and Content Type
- ref (subject category)
- art (subject category)
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