Production of highly pure iron disulfide nanoparticles using hydrothermal synthesis method

Abstract

Hydrothermal synthesis of nanopyrite was investigated in a stirred reactor. The product was characterized by X-ray diffraction (XRD). The result indicated that the synthesized powder was a mixture of pyrite and elemental sulfur. Purification of pyrite was studied via various methods including; solvent extraction, reaction with Na 2 SO 3 and thermal treatment. Before and after purification the synthetic powder was characterized by XRD and scanning electron microscopy. Finally, it was concluded that thermal treatment at temperature 300 °C for 2.5 h was the most appropriate condition to purify pyrite.