Reporting the magnetic profile of cobalt ferrite nanoparticles at different temperatures

2021 ◽  
Vol 112 (5) ◽  
pp. 391-396
Author(s):  
Israf Ud Din ◽  
Tooba Saeed ◽  
Zahoor Ahmad ◽  
Abdulrahman I. Alharthi ◽  
Mshari A. Alotaibi ◽  
...  
Keyword(s):  
Cobalt Ferrite ◽  
Cobalt Nitrate ◽  
Ferrite Nanoparticles ◽  
Ferric Nitrate ◽  
Nitrate Hexahydrate ◽  
X Ray Diffraction ◽  
Cobalt Ferrite Nanoparticles ◽  
Stability Structure ◽  
Different Temperatures ◽  
Magnetic Profile

Abstract Cobalt ferrite nanoparticles (CFNs) were synthesized using cobalt nitrate hexahydrate and ferric nitrate nonahydrate through a wet chemical method. Various characterization techniques were used to confirm the synthesis of CFNs. The thermal stability, structure, morphology and crystallinity of the synthesized CFNs were determined by thermogravimetric analysis, field emission scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray diffraction. The results show that the synthesized nanoparticles are stable and crystalline with fine homogenized structure. Vibrating sample magnetometry was used to determine the magnetic properties of the synthesized material. The coercivity was noted to be decreased and the hysteresis loop gradually flattens as the temperature increases toward the Curie temperature.

scholarly journals Elimination of Escherichia coli in Water Using Cobalt Ferrite Nanoparticles: Laboratory and Pilot Plant Experiments

Materials ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2103
Author(s):  
Elmer Gastelo ◽  
Juan Montes de Oca ◽  
Edward Carpio ◽  
Juan Espinoza ◽  
Pilar García ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Pilot Plant ◽  
Cobalt Ferrite ◽  
Ferrite Nanoparticles ◽  
Disk Diffusion ◽  
Diffusion Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
E Coli ◽  
Cobalt Ferrite Nanoparticles

This paper focuses on the synthesis of cobalt ferrite nanoparticles by the sol–gel method and their photocatalytic activity to eliminate bacteria in aqueous media at two different scales: in a laboratory reactor and a solar pilot plant. Cobalt ferrite nanoparticles were prepared using Co(II) and Fe(II) salts as precursors and cetyltrimethyl ammonium bromide as a surfactant. The obtained nanoparticles were characterized by X-ray diffraction, scanning and transmission electron microscopy. Escherichia coli (E. coli) strain ATCC 22922 was used as model bacteria for contact biocidal analysis carried out by disk diffusion method and photocatalysis under an ultraviolet A (UV-A) lamp for laboratory analysis and solar radiation (radiation below 350 W/m2 in a typical cloudy day) for the pilot plant analysis. The results showed that cobalt ferrite nanoparticles have an average diameter of (36 ± 20) nm and the X-ray diffraction pattern shows a cubic spinel structure. Using the disk diffusion technique, it was obtained inhibition zones of (17 ± 2) mm diameter. Results confirm the photocatalytic elimination of E. coli in water samples with remaining bacteria below 1% of the initial concentration during the experiment time (30 min for laboratory tests and 1.5 h for pilot plant tests).

scholarly journals Structural, dielectric and low temperature magnetic response of Zn doped cobalt ferrite nanoparticles

AIP Advances ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 055202 ◽  
Author(s):  
Khalid Mujasam Batoo ◽  
Emad H. Raslan ◽  
Yujie Yang ◽  
Syed Farooq Adil ◽  
Mujeeb Khan ◽  
...  
Keyword(s):  
Low Temperature ◽  
Cobalt Ferrite ◽  
Ferrite Nanoparticles ◽  
Magnetic Response ◽  
Cobalt Ferrite Nanoparticles
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