X-Ray Diffraction and Cation Distribution Studies in Zinc-Substituted Nickel Ferrite Nanoparticles

2013 ◽  
Vol 27 (2) ◽  
pp. 547-553 ◽  
Author(s):  
D. V. Kurmude ◽  
R. S. Barkule ◽  
A. V. Raut ◽  
D. R. Shengule ◽  
K. M. Jadhav
Keyword(s):  
Cation Distribution ◽  
Nickel Ferrite ◽  
Ferrite Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nickel Ferrite Nanoparticles ◽  
Distribution Studies

scholarly journals Preparation and Characterization of Nickel Ferrite-SiO2/Ag Core/Shell Nanocomposites

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
I. G. Blanco-Esqueda ◽  
G. Ortega-Zarzosa ◽  
J. R. Martínez ◽  
A. L. Guerrero
Keyword(s):  
Silver Nanoparticles ◽  
Nickel Ferrite ◽  
Sol Gel ◽  
Ferrite Nanoparticles ◽  
Core Shell ◽  
X Ray Diffraction ◽  
Magnetic Composites ◽  
Nickel Ferrite Nanoparticles ◽  
Gel Technique

Magnetic composites with silver nanoparticles bonded to their surface were successfully prepared using a simple chemical method. By means of a sol-gel technique, nickel ferrite nanoparticles have been prepared and coated with silica to control and avoid their magnetic agglomeration. The structural and magnetic properties of the nanoparticles were studied in function of the annealing temperature. Then, silver nanoparticles were incorporated by hydrolysis-condensation of tetraethyl orthosilicate, which contains silver nitrate on the surface of the nickel ferrite-SiO2core/shell. Samples were characterized using X-ray diffraction, IR spectroscopy, SEM, and magnetometry. Results show that the silica covered the nickel ferrite nanoparticles and the silver nanoparticles remain stable in the surface of the composite.

scholarly journals Polyol-Made Spinel Ferrite Nanoparticles—Local Structure and Operating Conditions: NiFe2O4 as a Case Study

2021 ◽  
Vol 8 ◽  
Author(s):  
T. Gaudisson ◽  
S. Nowak ◽  
Z. Nehme ◽  
N. Menguy ◽  
N. Yaacoub ◽  
...  
Keyword(s):  
Spinel Phase ◽  
Spinel Ferrite ◽  
Ferrite Nanoparticles ◽  
Operating Conditions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cation Migration ◽  
Anion Vacancies ◽  
Nickel Ferrite Nanoparticles ◽  
Cation And Anion Vacancies

We report the effect of a polyol-mediated annealing on nickel ferrite nanoparticles. By combining X-ray fluorescence spectroscopy, X-ray diffraction, and 57Fe Mössbauer spectrometry, we showed that whereas the as-prepared nanoparticles (NFO) are stoichiometric, the annealed ones (a-NFO) are not, since Ni0-based crystals precipitate. Nickel depletion from the spinel lattice and reduction in the polyol solvent are accompanied with an important cation migration. Indeed, thanks to Mössbauer hyperfine structure analysis, we evidenced that the cation distribution in NFO departs from the thermodynamically stable inverse spinel structure with a concentration of tetrahedrally coordinated Ni2+ of 20 wt-% (A sites). After annealing, and nickel demixing, originated very probably from the A sites of NFO lattice, the spinel phase accommodates with cation and anion vacancies, leading to the (Fe3+0.84□0.16)A[Ni2+0.80Fe3+1.16□0.04]BO4-0.20 formula, meaning that the applied polyol-mediated treatment is not so trivial.

scholarly journals Positron annihilation lifetime, cation distribution and magnetic features of Ni1−xZnxFe2−xCoxO4 ferrite nanoparticles

RSC Advances ◽  
2017 ◽  
Vol 7 (36) ◽  
pp. 22320-22328 ◽  
Author(s):  
Hossein Nikmanesh ◽  
Parviz Kameli ◽  
Seyed Morteza Asgarian ◽  
Shiva Karimi ◽  
Mahmood Moradi ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Cation Distribution ◽  
Nickel Ferrite ◽  
Sol Gel ◽  
Ferrite Nanoparticles ◽  
Nominal Composition ◽  
Gel Method ◽  
Positron Annihilation Lifetime ◽  
Nickel Ferrite Nanoparticles ◽  
Magnetic Features

A series of Zn and Co-substituted nickel ferrite nanoparticles of nominal composition Ni1−xZnxFe2−xCoxO4 (x = 0, 0.1, 0.2, 0.3, 0.4, 0.5) have been synthesized by the PVA assisted sol–gel method.

Applications of Fourier Transform Infrared and X-Ray Techniques to Analyze Nickel Ferrite Nanoparticles Produced

2012 ◽  
Vol 727-728 ◽  
pp. 884-887
Author(s):  
Paulo Sergio da Silva Porto ◽  
José Rafael C. Proveti ◽  
E.P. Muniz ◽  
R.D. Pereira ◽  
D.R. Araujo
Keyword(s):  
Fourier Transform ◽  
Nickel Ferrite ◽  
Microwave Plasma ◽  
Sol Gel ◽  
Fourier Transform Infrared ◽  
Ferrite Nanoparticles ◽  
Isothermal Treatment ◽  
X Ray ◽  
Apple Peel ◽  
Nickel Ferrite Nanoparticles

Various methods have been reported to obtain nanosized ferrite particles such as chemical coprecipitation, sol-gel, spray-drying, microwave plasma, sonochemical, hydrothermal synthesis, reverse micelle technique and mechano synthesis. In this work Nickel Ferrite nanoparticles are produced using coconut water or pectin extracted from apple peel (using sulfuric or chloridric acid) as precursor for the proteic sol-gel (PSG) method. The samples are prepared by drying and subsequent isothermal treatment of the sol gel at 873 or 1173 K during 2 hours. The resultant materials were analyzed by Fourier Transform Infrared Spectroscopy (FTIRS) and discussed with emphasis in the purity of the samples produced.

Synchrotron X-ray diffraction study on the cation distribution in quaternary Li-Fe-Mn spinel oxides

2007 ◽  
Vol 2007 (suppl_26) ◽  
pp. 477-482
Author(s):  
W. Nowicki ◽  
J. Darul ◽  
P. Piszora ◽  
C. Baehtz ◽  
E. Wolska
Keyword(s):  
Diffraction Study ◽  
Cation Distribution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Spinel Oxides

scholarly journals Synthesis, characterization and heavy metal removal efficiency of nickel ferrite nanoparticles (NFN’s)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Waheed Ali Khoso ◽  
Noor Haleem ◽  
Muhammad Anwar Baig ◽  
Yousuf Jamal
Keyword(s):  
Heavy Metals ◽  
Nickel Ferrite ◽  
Contact Time ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Ferrite Nanoparticles ◽  
Batch Adsorption ◽  
Aqueous Environment ◽  
Human Beings ◽  
Nickel Ferrite Nanoparticles

AbstractThe heavy metals, such as Cr(VI), Pb(II) and Cd(II), in aqueous solutions are toxic even at trace levels and have caused adverse health impacts on human beings. Hence the removal of these heavy metals from the aqueous environment is important to protect biodiversity, hydrosphere ecosystems, and human beings. In this study, magnetic Nickel-Ferrite Nanoparticles (NFNs) were synthesized by co-precipitation method and characterized using X-Ray Diffraction (XRD), Energy Dispersive Spectroscopy (EDS) and Field Emission Scanning Electronic Microscopy (FE-SEM) techniques in order to confirm the crystalline structure, composition and morphology of the NFN’s, these were then used as adsorbent for the removal of Cr(VI), Pb(II) and Cd(II) from wastewater. The adsorption parameters under study were pH, dose and contact time. The values for optimum removal through batch-adsorption were investigated at different parameters (pH 3–7, dose: 10, 20, 30, 40 and 50 mg and contact time: 30, 60, 90, and 120 min). Removal efficiencies of Cr(VI), Pb(II) and Cd(II) were obtained 89%, 79% and 87% respectively under optimal conditions. It was found that the kinetics followed the pseudo second order model for the removal of heavy metals using Nickel ferrite nanoparticles.

Tailoring the photo-Fenton activity of nickel ferrite nanoparticles synthesized by low-temperature coprecipitation technique

Optik ◽  
2017 ◽  
Vol 137 ◽  
pp. 244-253 ◽  
Author(s):  
P. Annie Vinosha ◽  
Belina Xavier ◽  
A. Ashwini ◽  
L. Ansel Mely ◽  
S. Jerome Das
Keyword(s):  
Low Temperature ◽  
Nickel Ferrite ◽  
Ferrite Nanoparticles ◽  
Nickel Ferrite Nanoparticles ◽  
Coprecipitation Technique

FORMATION AND HARD MAGNETIC PROPERTIES OF A HEXAGONAL NETWORK OF NICKEL FERRITE NANOPARTICLES

2006 ◽  
Vol 20 (26) ◽  
pp. 1645-1651
Author(s):  
JIAFU CHEN ◽  
YU YE ◽  
QIANWANG CHEN
Keyword(s):  
Network Structure ◽  
Self Assembly ◽  
Nickel Ferrite ◽  
Ferrite Nanoparticles ◽  
Magnetic Feature ◽  
Bulk Materials ◽  
Nickel Ferrite Nanoparticles ◽  
Carbon Coated ◽  
Hard Magnetic Properties ◽  
Hexagonal Network

A novel hexagonal network structure formed by self-assembly of discrete nickel ferrite nanoparticles on a carbon-coated Cu grid is reported. Each hexagon consists of about 22 discrete nanoparticles with sizes from 120 to 250 nm. The side of the regular hexagon contains 4–6 discrete nanoparticles. The sample displays a large coercivity of 622.6 Oe, exhibiting a hard magnetic feature different from those of the corresponding bulk materials, and is closely related to the hexagonal network structure of nickel ferrite nanoparticles.

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