Synthesis of CoFe2O4 Nanoparticles: The Effect of Ionic Strength, Concentration, and Precursor Type on Morphology and Magnetic Properties
Joint Authors
Zielińska-Jurek, Anna
Malinowska, Izabela
Ryżyńska, Zuzanna
Mrotek, Eryka
Klimczuk, Tomasz
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-05-05
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
The present study highlights the effect of metal precursor types (SO42¯, Cl¯, and NO3¯), their concentration, and the influence of ionic strength of reaction environment on the morphology, surface, and magnetic properties of CoFe2O4 particles.
The magnetic nanoparticles were obtained by chemical coprecipitation in alkaline medium at increasing metal concentration in the range of 0.0425 mol·dm-3 to 0.17 mol·dm-3 and calcination temperature from 400°C to 800°C.
It was found that the chemistry of precursors can be directly correlated with magnetic properties.
The CoFe2O4 particles from metal sulphate precursors showed the highest saturation magnetization and the lowest coercivity.
The adjustment of ionic strength in the range of 1.25–5 M was achieved by adding an appropriate quantity of metal sulphates into aqueous solutions at a constant pH or by adding an appropriate quantity of NaClO5 under similar conditions.
The average hydrodynamic size of CoFe2O4 increased from 46 nm to 54 nm with increasing metal concentration and ionic strength.
An explanation of magnetic properties, caused by ionic strength and metal concentration, is given based mainly on the reduction in repulsive forces at the particle interface and compensation of the double electric layer in the presence of anions.
The observed coercivity was lower for the particles obtained in solutions with the highest ionic strength, whereas the concentration of metals and calcination temperature affected the saturation magnetization and morphology of the obtained cobalt ferrite particles.
American Psychological Association (APA)
Malinowska, Izabela& Ryżyńska, Zuzanna& Mrotek, Eryka& Klimczuk, Tomasz& Zielińska-Jurek, Anna. 2020. Synthesis of CoFe2O4 Nanoparticles: The Effect of Ionic Strength, Concentration, and Precursor Type on Morphology and Magnetic Properties. Journal of Nanomaterials،Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1188614
Modern Language Association (MLA)
Malinowska, Izabela…[et al.]. Synthesis of CoFe2O4 Nanoparticles: The Effect of Ionic Strength, Concentration, and Precursor Type on Morphology and Magnetic Properties. Journal of Nanomaterials No. 2020 (2020), pp.1-12.
https://search.emarefa.net/detail/BIM-1188614
American Medical Association (AMA)
Malinowska, Izabela& Ryżyńska, Zuzanna& Mrotek, Eryka& Klimczuk, Tomasz& Zielińska-Jurek, Anna. Synthesis of CoFe2O4 Nanoparticles: The Effect of Ionic Strength, Concentration, and Precursor Type on Morphology and Magnetic Properties. Journal of Nanomaterials. 2020. Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1188614
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1188614