Eco-Friendly Fabrication of FeS QD-Chitosan Biopolymer Composites: Green Synthetic Approach.

In this paper, we offer a unique green synthetic approach for producing iron sulfide quantum dots (FeS QD)-chitosan composites using gel chemistry. The technique uses the environmental features of chitosan, a biocompatible and biodegradable polysaccharide, and the excellent electrical properties of FeS QDs. By sustainable chemistry principles, the synthesis process is carried out under gentle settings, using aqueous solutions and avoiding hazardous solvents and strong chemicals. The resulting FeS QD-chitosan composite has superior structural integrity, homogeneous QD distribution, and improved physicochemical characteristics. Comprehensive characterization techniques, such as X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and photoluminescence spectroscopy, confirm the successful integration of FeS QDs into the chitosan matrix while preserving their quantum properties. This work demonstrates the viability of gel chemistry as a green synthetic technique for generating functional nanocomposites, providing a scalable and environmentally responsible option for advanced material development.