Green Synthesis of Silver Nanoparticles From Solenostemon Monostachyus Leaf Extract and In Vitro Antibacterial and Antifungal Evaluation

Abstract

A rapid green synthesis of silver nanoparticles (AgNPs) using plant extract Solenostemo monastachyus (S. monastachyus) with silver nitrate is reported here. The formation of AgNPs was confirmed by a colour change in the plant extract from pale yellow to reddish brown and was further characterized by UV-Vis spectrophotometric, FT-IR, SEM, EDX and XRD analyses. Ag+ ions were reduced by the phytochemicals present in the extract. A characteristic single broad peak was observed at 450 nm and has been ascribed to the excitation of surface plasmon resonance phenomenon. The efficient capping and stabilization properties of the NPs were revealed by the FT-IR analysis. SEM and XRD results showed the formation of spherical shaped AgNPs with the average particle size of less than 100 nm and EDX confirmed the presence of silver in the prepared AgNPs. The antimicrobial properties of the biosynthesized AgNPs was evaluated against some selected bacterial and fungal species. The prepared AgNPs had notable antimicrobial activity against the selected bacterial and fungal species. Thus, the biosynthesized AgNPs could be a good lead for antimicrobial agent.

Antibacterial Activity of Green Synthesized Eugenia jambolana Seeds Extract Mediated Silver Nanoparticles

“…The variations in the FT-IR spectrum indicate the presence of bioactive molecules in plant extracts that participated in the reduction of silver nitrate (AgNO3) and the formation of silver nanoparticles. Interestingly, this result is in concordance with most of the existing literature [25].…”

Biogenic synthesis of silver nanoparticles using leaf extracts of <i>Chromolaena odorata, Tithonia diversifolia</i> and <i>Solenostemon monostachyus</i>

“…Furthermore, the application of silver nitrate to Solenostemon monostachyus (SM) resulted in a change from colourless to a deep, dark-brown colouration. This alteration in colour was also highlighted in the research conducted by Karu et al (2020), where a transition from a pale-yellow hue to a reddish-brown shade was documented. These colour changes serve as key indicators of the successful formation of silver nanoparticles in the respective plant extracts, providing valuable insights into the synthesis process.…”

Synthesis and Characterization of Chrysophyllum albidum (African Star Apple) Plant‐Mediated Zinc Oxide Nanostructures and Evaluation of Their Antioxidant, Anti‐Inflammatory, and Antimicrobial Activity

“…Meanwhile, these phytochemicals were reported to be present in most plant extracts that were utilized in plant-mediated ZnO NPs [44,45]. Sharp peaks located at 1638 cm -1 and between 1044 and 1085 cm -1 could also be assigned to C=O and C-N stretching vibrations of proteins in the amide bands and aromatic rings of the phenols and polyphenols in the extracts as investigated by Karu et al [46]. Similar bands were identified in C. fistulaand M. azedarach-mediated ZnO NPs as well as C. albidummediated Ag NPs as reported in literature [41,47].…”