Synthesis of Novel Cobalt-Chromium Sulfide Nanocomposites and Study the Influence of Cobalt content on Structural, morphological and Electrical Characteristics
Cobalt sulfide, chromium sulfide, and their composite nanomaterials were synthesized by the precipitation technique, utilizing sodium sulfide as the Sulphur source and metal chlorides as the metal source. The produced materials were analyzed utilizing several sophisticated methods. X-ray diffraction (XRD) verified the polycrystalline characteristics of the materials and demonstrated that the composite had an enhanced crystal structure relative to the individual sulfides, with the average crystal size augmenting with the cobalt oxide concentration. Energy-dispersive X-ray spectroscopy (EDX) confirmed the elemental composition, indicating that chromium sulfide exhibited only Cr and S peaks, cobalt sulfide exhibited just Co peaks, and the composite presented peaks for S, Co, and Cr. Optical qualities were evaluated using UV-Vis spectrophotometry, while electrical properties were probed by Hall effect measurements to establish conductivity type. The results demonstrated considerable improvements in the structural, optical, and electrical characteristics of the produced nanomaterials. The XRD data demonstrated that the superposition procedure improved crystallinity, while the EDX spectra validated the purity of the individual sulfides and the appropriate elemental distribution within the composite. Optical absorption augmented with increased cobalt sulfide concentration, whilst the optical energy gap for direct electronic transitions diminished. Hall effect experiments indicated fluctuations in conductivity, with the membranes demonstrating both n-type and p-type characteristics based on composition. These findings underscore the promise of these nanomaterials for improved optoelectronic and semiconductor applications.