Structural and magnetic properties of P25 TiO2 nanoparticles doped by Co

•Using a new method we achieve uniform dissolution of Co atoms in the TiO2 matrix.•This was demonstrated by XRD, EDX, XPS and FNR analysis.•The resulting structures exhibit antiferromagnetic interactions at low temperatures. The present work reports on the structural and magnetic properties of TiO2...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2020-05, Vol.501, p.166442, Article 166442
Main Authors: Mariano, José F.M.L., Bessergenev, Valentim G., Lourenço, João P., Hantusch, Martin, Burkel, Eberhard, do Rego, Ana M. Botelho, Rajňák, Michal, Timko, Milan, Kopčanský, Peter
Format: Article
Language:English
Subjects:
Anatase
Antiferromagnetism
Chloroform
Co-doped P25
Cobalt
FNR
Heat treatment
Low temperature
Magnetic properties
Magnetism
Nanoparticles
Titanium dioxide
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Summary:•Using a new method we achieve uniform dissolution of Co atoms in the TiO2 matrix.•This was demonstrated by XRD, EDX, XPS and FNR analysis.•The resulting structures exhibit antiferromagnetic interactions at low temperatures. The present work reports on the structural and magnetic properties of TiO2 P25 Degussa powder doped with cobalt. Dissolution of cobalt in TiO2 matrix was achieved by precipitation of tris(diethyldithiocarbamato) cobalt(III) (CoDtc - Co[S2CN(C2H5)2]3 in chloroform (CHCl3) and consequent thermal treatment. Five different Co atomic percentage contents were chosen, e.g., 0.5%, 1%, 2%, 5% and 10%. It was shown that cobalt atoms are uniformly distributed across TiO2 matrix and exhibit antiferromagnetic interactions at low temperatures.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2020.166442