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- Title
Preparation of hcp and fcc Ni and Ni/NiO Nanoparticles Using a Citric Acid Assisted Pechini-Type Method.
- Authors
García-Cerda, L. A.; Bernal-Ramos, K. M.; Montemayor, Sagrario M.; Quevedo-López, M. A.; Betancourt-Galindo, R.; Bueno-Báques, D.
- Abstract
The preparation and characterization of hcp and fcc Ni and Ni/NiO nanoparticles is reported. Ni and Ni/NiO nanoparticles were obtained starting from a precursor material prepared using a citric assisted Pechini-type method and, then, followed by a calcination of the precursor in air at either 400 or 600?C for different times. The precursor was analyzed using thermogravimetric and differential thermal methods (TGA-DTA), and the resulting nanoparticles were characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and vibrational sample magnetometry. Nanoparticles showed a phase transformation for Ni from hcp to fcc and/or to fcc NiO structure as the calcination time increased. The influence of the phase transition and the formation of NiO on the magnetic properties of the samples are discussed.
- Subjects
NANOPARTICLES; CITRIC acid; NANOSTRUCTURED materials; MAGNETIC properties; X-ray diffraction; TRANSMISSION electron microscopy
- Publication
Journal of Nanomaterials, 2011, p1
- ISSN
1687-4110
- Publication type
Article
- DOI
10.1155/2011/162495