Electrosynthesis of magnetite nanoparticles

We have successfully synthesized magnetite (Fe3O4) nanoparticles and SiO2-coated magnetite nanoparticles by an enviromentally friendly electrochemical method. The results have been published in: (i) Advanced Powder Technology and (ii) Journal of Nanoparticle Research. Below is summary of the articles

Advanced Powder Technology (2011), in press
Synthesis of magnetite nanoparticles by surfactant-free electrochemical method in an aqueous system
Method: electro-oxidation of iron in water
Material: magnetite (Fe3O4)
Particle size: 10-30 nm
Properties: ferromagnetic
Impurities: FeOOH

SEM image and particle size distribution

Journal of Nanoparticle Research (2012) 14:807
One-step synthesis of silica-coated magnetite nanoparticles by electrooxidation of iron in sodium silicate solution
Method: electro-oxidation of iron in sodium silicate solution
Material: SiO2-coated magnetite
Size: 6-10 nm
Properties: superparamagnetic
Impurities: none

SEM image and particle size distribution

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