Green synthesis of silver nanoparticles (AgNPs) incorporated with Adenia trilobata leaf extracts and its anti-bacterial application

Abstract

Currently, eco-friendly, cost-effective, and simple synthesis techniques are drawing the attention of nanoparticle researchers. The conversion of silver ions to silver nanoparticles (AgNPs) is carried out using the Adenia trilobata leaf extract, which is capable of acting as an exclusive reducing agent. AgNPs show very crucial antibacterial properties and are nontoxic for humans. The color of the solution changes from light blue to brown, ensuring the formation on nanoparticles. The biosynthesized AgNPs are incorporated into cotton fiber, and their antibacterial activity on gram negative ( E. coli) bacteria has been studied. The UV/Vis and absorption spectroscopy analysis shows a surface plasmon resonance peak at 445 nm. The x-ray diffraction measurement reveals peaks at 38.02 and 44.23, and the average particle size is 18.30 nm. Field emission scanning electron microscopy has been performed to find the size, shape, and morphology of the treated nanoparticles and the AgNP-incorporated cotton fiber. The Fourier transform infrared spectroscopy result shows the presence of functional groups of AgNPs and capping agents. The antibacterial activity on gram negative ( E. coli) bacterial strains for the both cases showed a promising result.

Psidium guajava leaf extract mediated green synthesis of silver nanoparticles and its application in antibacterial coatings

“…2 shows the color change observation of AgNPs solutions, the colors gave similar result with other previous research. 15 For further confirmation of the formation of NPs UV-Vis spectroscopic analysis was accomplished.…”

“…To synthesize silver nanoparticles, aqueous leaf extracts (1 mL of P. guajava) and 10 mL of AgNO 3 solution in different concentrations (10,15, 20 and 25 mM) were taken in a beaker. The solution was placed in a hot plate; the temperature of the solution/mixture was raised to ∼60 °C maintaining constant magnetic stirring for 10 minutes.…”

“…In addition, it has applications in biomedical devices, environmental remediation, medicine, food packaging, cosmetics, and other industrial purposes. 15…”

“…Synthesis of various NPs such as Au, Cu, Ni, Al including Ag can be attained from guava leaf extract. 10,15,16 Several researchers have taken attempts to synthesize metallic nanoparticles exhausting aqueous extract of P. guajava leaves, especially silver nanoparticles considering wide range of advantages of green synthesis. Silver nitrate (AgNO 3 ) was used as a precursor and most of the research used (1-30) mM solution of silver ions reduced by different percentages of aqueous extract of P. guajava leaves.…”

“…In addition, it has applications in biomedical devices, environmental remediation, medicine, food packaging, cosmetics, and other industrial purposes. 15 AgNPs have distinct composition and structure, crystallinity, shape and size compared to the bulk forms. Consequently, it exhibited excellent physicochemical properties for instance chemical stability, surface-enhanced Raman scattering, high conductivity both thermal and electrical, catalytic activity, nonlinear optical behavior, and biological properties compare to others NPs.…”