Open AccessPreparation of hcp and fcc Ni and Ni/NiO Nanoparticles Using a Citric Acid Assisted Pechini-Type Method
Author(s) -
L.A. Garcı́a-Cerda,
K. M. Bernal-Ramos,
Sagrario M. Montemayor,
Manuel QuevedoLopez,
R. Betancourt-Galindo,
Darío BuenoBaqués
Publication year - 2011
Publication title -
journal of nanomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.463
H-Index - 66
eISSN - 1687-4129
pISSN - 1687-4110
DOI - 10.1155/2011/162495
Subject(s) - non blocking i/o , materials science , calcination , high resolution transmission electron microscopy , thermogravimetric analysis , nanoparticle , differential thermal analysis , citric acid , chemical engineering , transmission electron microscopy , analytical chemistry (journal) , nuclear chemistry , diffraction , nanotechnology , catalysis , organic chemistry , chemistry , physics , optics , engineering
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
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