Scalable synthesis and functionalization of cobalt nanoparticles for versatile magnetic separation and metal adsorption

Pipsa Mattila, Hanna Heinonen, Kalle Loimula, Johanna Forsman, L.-S. Johansson, Unto Tapper, Riitta Mahlberg, Hans-Peter Hentze, Ari Auvinen, Jorma Jokiniemi (Corresponding Author), Roberto Milani (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Magnetic cobalt nanoparticles coated with a thin carbon shell were produced by means of a scalable method based on hydrogen reduction synthesis. The presence of oxidized groups on the surface of the carbon shell enabled the reaction with alkoxysilanes bearing amino and thiol reactive functions under mild conditions, and therefore the formation of a thin functional silane layer which holds the potential for further modification in consideration of specific applications, e.g., in the separation and catalysis fields. The magnetic nanoparticles bearing surface thiol groups were also used in metal adsorption tests. These nanoparticles could efficiently adsorb not only gold from a chloride salt aqueous solution, but also several other metals when incubated in a thiocyanate-leached solution obtained from crushed printed circuit boards. The combination of a scalable production method with a simple and versatile surface modification strategy opens up a wide array of potential industrial applications in the fields of separation, sensing, and biomedical devices.
Original languageEnglish
Number of pages11
JournalJournal of Nanoparticle Research
Volume16
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

Fingerprint

Functionalization
Magnetic separation
Cobalt
Bearings (structural)
Adsorption
Nanoparticles
Shell
Carbon
cobalt
Metals
Synthesis
Magnetic Nanoparticles
Sulfhydryl Compounds
thiols
Surface Modification
nanoparticles
Printed Circuit Board
adsorption
Catalysis
synthesis

Keywords

  • nanoparticles
  • carbon coatings
  • metal adsorption
  • surface modification

Cite this

Mattila, Pipsa ; Heinonen, Hanna ; Loimula, Kalle ; Forsman, Johanna ; Johansson, L.-S. ; Tapper, Unto ; Mahlberg, Riitta ; Hentze, Hans-Peter ; Auvinen, Ari ; Jokiniemi, Jorma ; Milani, Roberto. / Scalable synthesis and functionalization of cobalt nanoparticles for versatile magnetic separation and metal adsorption. In: Journal of Nanoparticle Research. 2014 ; Vol. 16.
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abstract = "Magnetic cobalt nanoparticles coated with a thin carbon shell were produced by means of a scalable method based on hydrogen reduction synthesis. The presence of oxidized groups on the surface of the carbon shell enabled the reaction with alkoxysilanes bearing amino and thiol reactive functions under mild conditions, and therefore the formation of a thin functional silane layer which holds the potential for further modification in consideration of specific applications, e.g., in the separation and catalysis fields. The magnetic nanoparticles bearing surface thiol groups were also used in metal adsorption tests. These nanoparticles could efficiently adsorb not only gold from a chloride salt aqueous solution, but also several other metals when incubated in a thiocyanate-leached solution obtained from crushed printed circuit boards. The combination of a scalable production method with a simple and versatile surface modification strategy opens up a wide array of potential industrial applications in the fields of separation, sensing, and biomedical devices.",
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Scalable synthesis and functionalization of cobalt nanoparticles for versatile magnetic separation and metal adsorption. / Mattila, Pipsa; Heinonen, Hanna; Loimula, Kalle; Forsman, Johanna; Johansson, L.-S.; Tapper, Unto; Mahlberg, Riitta; Hentze, Hans-Peter; Auvinen, Ari; Jokiniemi, Jorma (Corresponding Author); Milani, Roberto (Corresponding Author).

In: Journal of Nanoparticle Research, Vol. 16, 2014.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Scalable synthesis and functionalization of cobalt nanoparticles for versatile magnetic separation and metal adsorption

AU - Mattila, Pipsa

AU - Heinonen, Hanna

AU - Loimula, Kalle

AU - Forsman, Johanna

AU - Johansson, L.-S.

AU - Tapper, Unto

AU - Mahlberg, Riitta

AU - Hentze, Hans-Peter

AU - Auvinen, Ari

AU - Jokiniemi, Jorma

AU - Milani, Roberto

N1 - Project code: 77626 Project code: 82865

PY - 2014

Y1 - 2014

N2 - Magnetic cobalt nanoparticles coated with a thin carbon shell were produced by means of a scalable method based on hydrogen reduction synthesis. The presence of oxidized groups on the surface of the carbon shell enabled the reaction with alkoxysilanes bearing amino and thiol reactive functions under mild conditions, and therefore the formation of a thin functional silane layer which holds the potential for further modification in consideration of specific applications, e.g., in the separation and catalysis fields. The magnetic nanoparticles bearing surface thiol groups were also used in metal adsorption tests. These nanoparticles could efficiently adsorb not only gold from a chloride salt aqueous solution, but also several other metals when incubated in a thiocyanate-leached solution obtained from crushed printed circuit boards. The combination of a scalable production method with a simple and versatile surface modification strategy opens up a wide array of potential industrial applications in the fields of separation, sensing, and biomedical devices.

AB - Magnetic cobalt nanoparticles coated with a thin carbon shell were produced by means of a scalable method based on hydrogen reduction synthesis. The presence of oxidized groups on the surface of the carbon shell enabled the reaction with alkoxysilanes bearing amino and thiol reactive functions under mild conditions, and therefore the formation of a thin functional silane layer which holds the potential for further modification in consideration of specific applications, e.g., in the separation and catalysis fields. The magnetic nanoparticles bearing surface thiol groups were also used in metal adsorption tests. These nanoparticles could efficiently adsorb not only gold from a chloride salt aqueous solution, but also several other metals when incubated in a thiocyanate-leached solution obtained from crushed printed circuit boards. The combination of a scalable production method with a simple and versatile surface modification strategy opens up a wide array of potential industrial applications in the fields of separation, sensing, and biomedical devices.

KW - nanoparticles

KW - carbon coatings

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