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- Publisher
- Springer Journals
- Copyright
- Copyright © 2017 by Springer Science+Business Media B.V.
- Subject
- Materials Science; Nanotechnology; Inorganic Chemistry; Characterization and Evaluation of Materials; Physical Chemistry; Optics, Lasers, Photonics, Optical Devices
- ISSN
- 1388-0764
- eISSN
- 1572-896X
- DOI
- 10.1007/s11051-017-3985-5
- Publisher site
- See Article on Publisher Site
Abstract
This report discusses the preparation and microstructure of Co/Ni co-doped MgGa2O4 nanoparticles. The nanoparticles with the size of 20–55 nm were synthesized by sol-gel method. The phase and crystallinity were confirmed by X-ray powder diffraction (XRD) pattern. The particle size was estimated according to XRD data and transmission electron microscopy. The electronic structure was studied using X-ray photoelectron spectroscopy (XPS). The XPS studies showed that Ga3+ ions possess tetrahedral and octahedral sites of spinel structure and the inverse degree (two times of the fraction of tetrahedral Ga3+ ions) has increased with the increase of the doping concentration of Co2+ and Ni2+ ions. For Co/Ni co-doped MgGa2O4, two broad absorption bands of 350~500 and 550~700 nm were observed in the absorption spectra. The broad band at 350~500 nm was assigned to the combination of the absorption of octahedral Co2+ and Ni2+ ions, whereas the absorption band at 550~700 nm is mainly due to tetrahedrally coordinated Co2+ ions and octahedrally coordinated Ni2+ ions.
Journal
Journal of Nanoparticle Research – Springer Journals
Published: Aug 10, 2017