Eco-Friendly Fabrication of FeS2 QD-Chitosan Biopolymer Composites: Green Synthetic Approach

Abstract

In this paper, we offer a unique green synthetic approach for producing iron sulfide quantum dots (FeS₂ 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 FeS₂ 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 FeS₂ 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 FeS₂ 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.