Abstract Fe@SnS 2 nanocomposites exhibit boundless special characteristics that offer them substantial eligibility regarding catalysis, energy storage, and environmental remediation. In this work, SnS 2 nanoparticles with different aging period (1-day, 2-days and 3-days) and Fe nanoparticles (0.1 M, 0.2 M, and 0.3 M) were prepared separately. It is followed by the preparation of Fe@SnS 2 nanocomposite by coupling iron nanoparticles with the tin disulfide (1-day) matrix (Fe@SnS 2 -1, Fe@SnS 2 -2, and Fe@SnS 2 -3). The various studies like XRD, UV–vis, photoluminescence (PL) spectra analysis, and transmission electron microscope have been used in the characterization of the synthesized Fe@SnS 2 nanocomposites. The powder X-ray diffraction investigation showed that the both SnS 2 and Fe@SnS 2 samples sustained the high level of crystallinity. In UV-visible spectrum, changes have been observed in the optical properties of the samples along with the bandgap energy modification. SnS 2 nanoparticles show an energy gap of 2.79 eV, however, in Fe@SnS 2 nanocomposites, the bandgap reduces to 2.46 eV. The existing surface defect states of the Fe@SnS 2 nanocomposites were analyzed using PL spectroscopy, which provided a better understanding of the electron-hole recombination behavior. The TEM images of the samples revealed the morphology, size distribution and effective incorporation of Fe nanoparticles into the SnS 2 matrix. The FTIR spectra of Fe@SnS 2 nanocomposites prove the appearance of the typical functional groups related to both SnS 2 and Fe integration. The catalytic performance of SnS 2 nanoparticles and Fe@SnS 2 nanocomposites was investigated by the photo degradation of methylene blue dye solution upon visible light irradiation, and it is noted that the Fe@SnS 2 nanocomposites exhibited higher catalytic efficiency, establishing them as highly effective photocatalysts.
Karthikeyan et al. (2026) studied this question.