Abstract
This study investigated the rapid and green synthesis of silver nanoparticles (AgNPs) using the extract of Diospyros lotus leaves. UV–Vis spectra showed the SPR band at around 409 nm, which proves AgNP formation. Nanoparticle formation was completed within 30 min. The analysis of particle size verified the formation of AgNPs with the average size of 20 nm. XRD patterns verified the crystalline nature of the AgNPs synthesized. SEM images verified the presence of spherical nanoparticles with no evidence of aggregations. The formation of spherical-shaped AgNPs with size ranging from 10 to 25 nm was also confirmed by TEM. FTIR analysis verified the involvement of phenolic compounds in AgNP formation. Also, the phytochemical screening of the plant extract proved the role of terpenoids, steroids and tannins as both reducing and stabilizing agents in nanoparticle formation. The AgNPs biosynthesized were found to have antibacterial activity against the human pathogen Escherichia coli. Furthermore, the synthesized AgNPs prevented the coagulation of blood samples. The accelerated reduction of methylene blue (MB) in the presence of 0.25, 0.5, 075 and 1 mL AgNPs with constant rates of 0.121, 0.187, 0.225 and 0.445 min−1 confirmed the catalytic potential of nanoparticles. No significant changes were observed in the catalytic efficiency of AgNPs in the four successive treatments.
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