Synthesis and Characterization of NiFe_2O_4 Nano-Octahedrons by EDTA-Assisted Hydrothermal Method

Authors

NERMİN KASAPOĞLU
ABDULHADİ BAYKAL
MUHAMMET S. TOPRAK
YÜKSEL KÖSEOĞLU
HARUN BAYRAKDAR

DOI

-

Abstract

Octahedral-like NiFe_2O_4 ferrite nanocrystals were synthesized using EDTA-assisted hydrothermal method under mild conditions. XRD and FTIR analysis were used for composition and structure investigation. XRD analysis revealed a pure ferrite phase with high crystallinity. Morphological investigation by SEM showed octahedral nanocrystals with an average particle size of \sim 40 nm. Crystallite size calculated from XRD peak broadening resulted in an average crystallite size of 39 nm, matching well with the SEM observations. TEM analysis and corresponding electron diffraction confirmed the octahedral morphology and single crystallinity of octahedral nanoparticles. Magnetic measurements showed that NiFe_2O_4 octahedrons have smaller coercivity than bulk ferrite due to the low shape anisotropy.

Keywords

Octahedral nanocrystals, ferrites, magnetic nanoparticles, hydrothermal synthesis, coercivity, EDTA, NiFe_2O_4

First Page

659

Last Page

666

Recommended Citation

KASAPOĞLU, NERMİN; BAYKAL, ABDULHADİ; TOPRAK, MUHAMMET S.; KÖSEOĞLU, YÜKSEL; and BAYRAKDAR, HARUN (2007) "Synthesis and Characterization of NiFe_2O_4 Nano-Octahedrons by EDTA-Assisted Hydrothermal Method," Turkish Journal of Chemistry: Vol. 31: No. 6, Article 11. Available at: https://journals.tubitak.gov.tr/chem/vol31/iss6/11