Phyto-mediated synthesis of silver nanoparticles using flower extract of Erythrina indica and evaluation of their biological activities

• Published in: Inorganic chemistry communications 2023-12, Vol.158, p.111610, Article 111610
• Main Authors: Selvam, Kandasamy, Saranya, Kanagarajan
• Format: Article
• Language: English
• Subjects: Antibacterial activity; Cytotoxicity; Erythrina indica flower; Photocatalytic activity; Silver nanoparticles
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2023.111610

[Display omitted] •EIF-AgNPs were successfully synthesized using flower extract of Erythrina indica by single-step.•Polyphenols in the flower extract played both a reducing agent and capping agent role.•Antibacterial activity and reactive orange 16 dye degradation of EIF-AgNPs was studied. The goal of this research was to investigate the antibacterial, cytotoxic and photocatalytic properties of silver nanoparticles synthesized from Erythrina indica flowers (EIF-AgNPs). The green synthesized EIF-AgNPs were characterized by UV–visible spectroscopy, field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR). The UV–visible spectrum of EIF-AgNPs revealed a 420 nm surface plasmon resonance (SPR) peak. The XRD analysis exhibited that the EIF-AgNPs were crystalline in nature. FT-IR revealed that the flower extract has been stabilized with the EIF-AgNPs by a capping agent. Furthermore, electron microscopy indicated that the EIF-AgNPs were spherical in shape and measured 42.3 nm in diameter. The eco-friendly synthesized EIF-AgNPs show potential antibacterial activity against Staphylococcus aureus and Salmonella typhi in a well-diffusion assay. In addition, in-vitro cytotoxicity tests on MCF-7 cell lines demonstrated that EIF-AgNPs (42.5 µg/mL) have harmful effects. Furthermore, EIF-AgNPs had a high degradation efficiency for reactive orange 16 (RO16), with 90 % elimination after 120 min of sunlight irradiation. Overall, the findings of this study indicate that Erythrina indica flower biosynthesized EIF-AgNPs may have antibacterial, cytotoxic and photocatalytic effects.