Abstract
In this project, cellulose nanocrystal-CNC, chitosan-CS, and starch-St doped MnO2 nanostructures (NSs) were synthesized by a co-precipitation approach. The motive of this research was to evaluate the effect of CNC, CS, and St on catalytic activity, kinetic adsorption, and antimicrobial potency with molecular docking (MD) analysis of MnO2. The hydrophilic head of polymers interacts with MnO2 NSs to regulate the growth, recombination rate, and stability of nanostructures. Notably, St-doped MnO2 exhibited the highest catalytic potency in an acidic medium in comparison to basic and neutral media. The kinetic modeling (pseudo-1st, pseudo-2nd order, Elovich, and intra-particle diffusion model) suggests that the adsorption of RhB dye by the NSs follows the pseudo-second-order kinetics. Among all samples, CNC-MnO2 and St-MnO2 proved to be an efficient antibacterial agents against E. coli and s. aureus bacteria, respectively. Findings revealed that polymer-based MnO2 nanostructures were the most efficient inhibitors of DNA gyrase against E. coli and S. aureus.
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