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Influence of dopant level on structural, optical and magnetic properties of Co-doped anatase TiO2 nanoparticles

✍ Scribed by K. Karthik; S. Kesava Pandian; K. Suresh Kumar; N. Victor Jaya

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
630 KB
Volume
256
Category
Article
ISSN
0169-4332

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✦ Synopsis

Cobalt-doped TiO 2 nanoparticles were synthesized by sol-gel method. The associated structural, optical, compositional and magnetic properties of the nanoparticles as a function of cobalt concentration have been systematically studied. The X-ray powder diffraction reveals that all samples have pure anatase phase tetragonal system and the lattice parameter analysis indicated that Co ions may substitute into the lattice of TiO 2 . The average particle size is 15 nm, when found through transmission electron microscope. Optical spectroscopy measurement showed that the bandgap value decreases upon increasing Co concentration. The magnetic measurements revealed that the enhanced room temperature ferromagnetism (RTFM) strongly depends on the doping content.

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