Molybdenum and chitosan-doped MnO₂ nanostructures used as dye degrader and antibacterial agent

Triplex-based nanomaterials composed of molybdenum (Mo) and chitosan (CS)-doped MnO₂ were fabricated via co-precipitation process. This research aimed to remove the pollutants from wastewater and for antibacterial activity. Doping of CS in host material enhanced the photocatalytic activity against dye. A brief analysis of prepared samples was carried out by several characterization techniques for better understanding. XRD results revealed the tetragonal structure of MnO₂, broadening of peaks noticed after Mo and CS doping. The existence of bending and stretching vibration mode is pointed out by FTIR. The absorption was increased upon doping accompanied red shift were examined with a UV–Vis spectrophotometer. Trap sites and migration of charge carriers in materials were examined with PL spectroscopy. The EDS technique was used to verify the elemental composition, and the results demonstrated the existence of dopants as well as host elements. Methylene blue (MB) is used to examine the photocatalytic performance of samples under visible light. Evaluation of photocatalytic and antibacterial activity depicted that prepared products can be employed as effective nanocatalysts for wastewater treatment.