Elaboration and characterization of nanocrystals based iron sulfide Fe x S y for energy conversion

Abstract

Iron disulfide FeS 2 known as pyrite have attracted attention in many fields for its interesting properties, expanding their fields of application in energy conversion technology. Therefore, we are interested in synthesizing FeS 2 nanostructures by an accessible elaboration method based on thermal evaporation. Iron/nickel thin films were prepared on ceramic Al 2 Si 2 O 5 -(OH) 4 . This was followed by a sulfidation annealing. X-ray diffraction (XRD) characterization revealed the presence of a Fe-S bonds relative of structural pyrite phase, which was confirmed by SEM analysis of chemical components and showed the elongated cubic morphology wanted; other characterization techniques are used to get an overview of the properties required for this work. In particular, photoluminescence spectra are used to determine band gaps, UV-Vis-IR to determine absorbance and gas treatment to determine the sensitivity to toxic gases.