Bio-inspired synthesis of platinum nanoparticles from fungus Fusarium oxysporum: its characteristics, potential antimicrobial, antioxidant and photocatalytic activities

Abstract

In the immediate study, the extract of fungus Fusarium oxysporum was used for the production of platinum nanoparticles. The biologically produced nanoparticles were characterized by UV–vis Spectroscopy, FTIR, powder XRD and SEM. FTIR results recognize the bioactive functional groups responsible for the reduction of hexachloroplatinic acid into platinum nanoparticles. XRD pattern revealed that the nanoparticles were crystalline and have face-centered cubic (fcc) geometry with average size of 25 nm. The morphology of biologically synthesized platinum nanoparticles was determined by SEM micrographs. The synthesized platinum nanoparticles were further examined for photocatalytic and biological activity such as antioxidant and antimicrobial activity against both bacteria and fungus. PtNps shows maximum degradation of methyl orange indicates their application in waste water treatment. The zone of inhibition against microbes was studied in accordance with the method of agar well diffusion and agar dilution method was helpful in determining the minimum inhibitory concentration of PtNps. The minimum inhibitory concentration of PtNps was found to be 62.5 μg ml−1 against E. coli, which is quite better than that of commercially available drug ampicillin. The antioxidant activity was studied by DPPH method and platinum nanoparticles shows 79% of scavenging activity.