Synthesis and characterization of carbon-coated wustite nanoparticles

Abstract Carbon-coated wustite nanoparticles (Fe 1− x O@C) were synthesized by a one-step process of thermal decomposition at temperature 400 °C and the reaction time varied from 1 to 3 h. The results show that when the synthesis time (t S ) is 1 h and 1.5 h, magnetite nanoparticles are formed alongside wustite, and an increase in the reaction time leads to the formation of phase-pure wustite nanoparticles with a carbon shell. The results of Raman spectroscopy indicate that the crystallinity of the carbon shell increases with increasing synthesis time. In addition, an increase in synthesis time influence on the value of the deviation from stoichiometry, which varies from 0.079 for the sample with t S  = 1 h – 0.129 for the sample with t S  = 3 h.