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

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...

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Bibliographic Details
Published in:	Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology Vol. 16; no. 9; pp. 1 - 11
Main Authors:	Mattila, Pipsa, Heinonen, Hanna, Loimula, Kalle, Forsman, Johanna, Johansson, Leena-Sisko, Tapper, Unto, Mahlberg, Riitta, Hentze, Hans-Peter, Auvinen, Ari, Jokiniemi, Jorma, Milani, Roberto
Format:	Journal Article
Language:	English
Published:	Dordrecht Springer Netherlands 01-09-2014 Springer Springer Nature B.V
Subjects:	Adsorption Carbon Catalysis Catalytic methods Characterization and Evaluation of Materials Chemistry and Materials Science Cobalt Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science; rheology Exact sciences and technology Fullerenes and related materials; diamonds, graphite Inorganic Chemistry Lasers Magnetic properties and materials Materials Science Methods of nanofabrication Nanoparticles Nanotechnology Optical Devices Optics Photonics Physical Chemistry Physics Research Paper Separation Shells Small particles and nanoscale materials Solid surfaces and solid-solid interfaces Specific materials Studies of specific magnetic materials Surface chemistry Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties) Synthesis Thiols Surface modification Metal adsorption Carbon-coated magnetic nanoparticles Cobalt Silanes Gold Thiols Industrial application Printed circuit board Surface treatments Magnetic nanomaterial Carbon Nanoparticles Magnetic particles Adsorption Functionalization Aqueous solutions Chlorides Fullerenes Thiocyanates Catalysis Arrays
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Summary:	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.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1388-0764 1572-896X
DOI:	10.1007/s11051-014-2606-9