Synthesis of FeCo nanoparticles
First, FeO(OH) and Co3O4 in appropriate
amount were dissolved in Trioctylamine (TOA), then the mixture was
loaded into a flask and dehydrated at 160 °C for 2 h under a flow of
argon. Afterward, the mixture was quickly heated to 370 °C while
vigorous stirring is maintained using a mechanical stirrer. Next, the
product was cooled to room temperature and collected by centrifugation
at 10,000 rpm. Finally, the product washed with hexane and ethanol, and
dried under vacuum to obtain FeCo nanoparticles (FeCoNPs).