ABSTRACT The advancement of semiconductor nanomaterials for optoelectronic applications becomes choice in nanotechnology research. Herein, we report simple facile hydrothermal synthesis route for copper sulfide (CuS) and Fe‐doped CuS (Fe:CuS) nanostructures, aimed to enhance photocatalytic efficiency under solar irradiation. By adjusting Fe dopant, crystallographic strain, band structure and defect chemistry of CuS were modulated. XRD with Rietveld refinement, SEM–EDX, Raman spectroscopy, UV–vis, x‐ray photoelectron spectroscopy (XPS) and photoluminescence study revealed precise structural and electronic transformations. Fe incorporation was found to enhance light‐harvesting capability and suppress electron–hole recombination. Photodegradation of methylene blue dye by as synthesized nanomaterials are analyzed. Notably, 4% Fe:CuS achieved an outstanding degradation efficiency of 99.31% within 280 min under natural sunlight. These results underscore the strategic role of transition‐metal doping in tailoring chalcogenide‐based photocatalysts, offering a scalable and energy‐efficient route for optoelectronic applications.
Gajbar et al. (Wed,) studied this question.