Comparative Analysis of Synthesis and Characterization of Silver Nanoparticles Extracted Using Leaf, Flower, and Bark of Hibiscus rosasinensis and Examine Its Antimicrobicidal Activity

Abstract

Nanotechnology is emerging with the biosynthesis of silver nanoparticles which is toxic free and friendly with the environment. Out of all the biosynthesis methods, plant extracts are more predominantly used which is readily available, and it is a least cost method. The plants have secondary metabolites such as phenolic compounds named as flavonoids; tannins are turned to be the reluctant to synthesize silver nanoparticles (AgNPs) from silver nitrate. The plant chosen to synthesize silver nanoparticles is the Hibiscus rosasinensis for the reason of the presence of various biomolecules. The reduction and stabilization process are performed due to the biomolecules. Silver nanoparticles produced from the Hibiscus plant are easier than the conventional method. The formation of nanoparticle of silver is indicated by the maximum absorbance peak at a wavelength of 458 nm obtained from the leaf and the bark extracts. The antimicrobicidal effects on various microbes were examined, and it is proved that bark produced better results.

Antimicrobial evaluation of silver nanoparticles using extracts of Crescentia cujete L.

“…Likewise, fungal forms were observed, with a predominance of filamentous fungi of the genera Penicillium sp and Aspergillus sp. Several studies report the presence of fungi and bacterial colonies in each of their treatments when using silver nanoparticles synthesized from plant extracts in their assays, a result that suggests little protective activity against these microorganisms (Anbukkarasi et al, 2015;Correa et al, 2016;Periasamy et al, 2022). This phenomenon can be explained mainly because the peptidoglycan of grampositive bacteria is in charge of giving rigidity to the cell wall and protecting the microorganism from osmotic lysis (Pírez and Mota, 2006).…”

A Awareness And Knowledge On Comparative Cytotoxic Effect Of Hibiscus- Marigold Herbal Formulation And Its Mediated Silver Nanoparticles

“…The silver ions from silver nanoparticles are believed to become attached to the negatively charged particles which leads to denaturation of protein and finally cell death. (12) In another study AgNPs were created using(13) A. esculentus flower extracts as a moderating agent. All of the examined gram-positive and gram-negative microbial pathogens were resistant to the NPs' antibacterial activities.…”

Green synthesis of silver nanoparticles: methods, biological applications, delivery and toxicity

“…Hence, the research moved toward a new convenient, eco-friendly, high yield and cost-effective method called biological synthesis. 12 In biological synthesis, for the reduction of silver nitrate (AgNO 3 ), some parts of plants [13][14][15][16][17][18][19][20][21][22] and microorganisms [23][24][25] are used as reducing agents. The phytoconstituents responsible for reducing silver ions into AgNPs are glycosides, terpenoids, alkaloids, phenolics, etc.…”