Exploring bimetallic Au–Ag core shell nanoparticles reduced using leaf extract of Ocimum tenuiflorum as a potential antibacterial and nanocatalytic agent

Biosynthesis of bimetallic Au–Ag core shell nanoparticle under ambient condition using Ocimum tenuiflorum (Krishna Tulsi) leaf extract is being reported for the first time. For biosynthesized nanoparticles (OTAuAgNPs) visual and spectrophotometric analysis was performed. Development a deep purple color suggested creation OTAuAgNPs. It then validated by UV–Vis spectrophotometry within 4 h incubation showing surface plasmon resonance peak at 560 nm. FESEM-EDAX, FT-IR, particle analyzer XRD were analytical techniques employed to characterize Using known antibiotic as control, OTAuAgNPs (10 mg/ml) had substantial bacteriostatic effect against Gram + ve (Bacillus subtilis) −ve (E.coli, Pseudomonas aeruginosa) bacteria. The (6.5 mg) showed good catalytic action adsorption Coomassie brilliant blue R250 dye (CBB) (50 mg/L, 25 mL), confirmed reduction in absorbance maxima that time dependent. A remarkable CBB (94.79%) attained 120 min, results best-suited PSO Elovich models with kinetic constant 5.96E−04 g/mg.min 37.81 mg/g.min, respectively. Further toxicity studies metabolite (post nano-remediated solution) carried out on Vigna radiata (green gram) germination growth. nanocatalyst remediated water revealed it nontoxic. Thus an ecofriendly cost-effective approach synthesis could be further explored removal from wastewater effluents.