Journal of King Saud University: Science (Jan 2023)
Synthesis and antimicrobial activity of silver nanoparticles: Incorporated couroupita guianensis flower petal extract for biomedical applications
Abstract
Recently, numerous plant-based synthesis techniques have been used to develop metal nanoparticles. The current study uses the medicinal plant extract of couroupita guianensis (CG) petals to create biogenic silver nanoparticles in an environmentally friendly manner. Different techniques, including ultraviolet–visible spectroscopy (UV–vis), Fourier Transformation Infrared spectroscopy (FTIR), X-ray diffraction (XRD), and Dynamic Light Scattering (DLS) analysis, are used to evaluate synthesized silver nanoparticles. From the XRD results confirm the emergence of nanosilver crystalline arrangement with the characteristic peaks at the glancing angles of 38.04°, 44.22°, 64.40°, and 77.37°. UV–vis spectroscopy displays the spectral absorption at λmax = 282 nm and shows the formation of silver nanoparticles. Images of produced Ag NPs taken with a scanning electron microscope (SEM) show the creation of flower-shaped particles. The functional behavior of flavones, triterpenoids, and polyphenols belonging to couroupita guianensis has been observed by ensuring their selective absorptions in FTIR spectral analysis silver nanoparticles had a substantial antibacterial effect on Gram-positive (B. subtilis) and Gram-negative (Escherichia coli) bacteria in general. It is found to become effective when symbiotic with the extract of couroupita guianensis flower petals for enhancing their antibacterial properties. This composite product gives a new and cost-effective formulation with more therapeutic possibilities. The observed results wide open the avenues of research possibilities with a lot of future scopes. The photocatalytic degradation efficiency of CG-Ag NPs on methylene blue (MB) dye was evaluated under visible light irradiation and produced indications of the synthesized material for photocatalytic applications.
