Abstract
FeSe2 nanoparticles and FeSe2/FeO(OH) nanocomposites have been synthesized through a novel controllable hydrothermal method with FeSO4⋅7H2O and SeCl4 as precursors. In this procedure, H2SeO3 (obtained from aqueous solution of SeCl4) is gradually reduced to Se and Se2− by reductant. The reduced Se and Se2− ions are combined with Fe2+ ion to give FeSe2. By varying the surfactant, reaction time, temperature, reductant and amount of hydrazine hydrate (N2H4⋅H2O), the method permits us to synthesize different products. The FeSe2 nanoparticles are synthesized in the presence of PEG4000 at 140°C for 13h. Using PEG600 (at 140°C or 110°C for 13h) and sodium dodecyl sulfate (at 140°C for 7h), FeSe2/FeO(OH) nanocomposites are synthesized. SEM and TEM images show the morphology and size of the as-synthesized samples. Chemical composition of the samples is characterized by XRD, XPS and EDS. Ultraviolet–visible and photoluminescence spectra exhibit optical properties of nanostructures. Magnetization measurement shows a twofold behavior, ferromagnetic and paramagnetic behaviors, for FeSe2 nanoparticles.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
