How is Fe3O4 prepared?
Fe3O4 was synthesized by coprecipitation method using FeCl3. 6H2O and (NH4)2Fe(SO4)2. 6H2O precursors dissolved in distilled water in mol ratio of Fe3+: Fe2+ = 2:1. NaOH solution was added slowly into the iron solution with continuous stirring for 60 minutes in Argon gas atmosphere.
What is the magnetic nature of Fe3O4?
The magnetic interaction among iron ions at octahedral and tetrahedral sites is antiferromagnetic and that among octahedral ions is ferromagnetic; overall a ferrimagnetic arrangement of Fe3O4. Therefore, the net magnetic moment in Fe3O4 is due to Fe2+ ions (4 μB).
How do you make iron oxide nanoparticles?
Iron oxide nanoparticles were synthesized by precipitation in isobutanol with sodium hydroxide and ammonium hydroxide. The isobutanol played a role of a surfactant in the synthesis. The nanoparticles were calcined for 100 min to 5 hours in the range of 300 to 600°C.
What is the Colour of Fe3O4?
black
the sample of Fe3O4 nanoparticles is a black pigment.
Why does fe3o4 show ferromagnetic?
Fe3O4 is ferrimagnetic because of the presence of the unequal number of magnetic moments in opposite direction.
What is Fe3O4 used for?
Among other industries, Iron oxide Fe3O4 nanoparticles are used as magnetic data storage, biosensors, drug-delivery, ferrofluids, magnetic coatings, EM-waves absorbing coatings, wastewater purification.
How are iron nanoparticles synthesized?
How to synthesize Fe3O4 nanoparticles with magnetic properties?
Fe 3 O 4 nanoparticles with various sizes and magnetic properties were synthesized by controlling the ratio of ferrous and ferric ions in the hydrolysis reaction. 1. Introduction
What is the reaction mechanism for the formation of Fe3O4?
Nanoparticles of Fe3 O 4 were synthesized by hydrolysis in an aqueous solution containing ferrous and ferric salts at various ratios with 1,6-hexanediamine as a base. It was found that the ferrous to ferric ratio influences the reaction mechanism for the formation of Fe3 O 4.
Is the synthesized Fe 3 O 4-NPS in high purity?
The results indicate that the synthesized Fe 3 O 4 -NPs are in high purity. Energy dispersive X-ray spectroscopy of MMT (a) and Fe 3 O 4 /MMT NCs for 1.0, 5.0, and 12.0 wt. % (b), (c), and (d). 3.5. FTIR Chemical Analysis
How does the ratio of ferrous to ferric ions affect Nanoparticles size?
When the ratio of ferrous to ferric ions was increased, the formation of large hydroxide particles as a precursor of Fe 3 O 4 was promoted, which resulted in an increase in the size of Fe 3 O 4 nanoparticles.