Green biosynthesis and characterization of silver nanoparticles using Portulaca oleracea and evaluation of antioxidant activity

Year 2026, Volume: 30 Issue: 1, 357 - 366, 11.01.2026

Mohini Salunke , Smita Kumbhar , Wakure Balaji

https://doi.org/10.12991/jrespharm.1845209

Abstract

In the past several years, silver (Ag) nanoparticles (NPs) have made great progress because of their exceptional properties in a variety of applications. The green production method of nanoparticles has been gaining ground on conventional chemical and physical processes by eschewing the usage of costly devices and several harmful substances. Consequently, AgNPs have been produced in this study using Portulaca oleracea extract as reducing, capping, and stabilising agents. It is an easy, green, and environmentally friendly process. UV-visible spectroscopy, FTIR, XRD, and DLS were used to prove the stability and making of the synthesised Po-AgNPs. AgNPs production was demonstrated by the UV–vis spectra, which showed a transition from a colourless liquid to a brownish solution. FTIR (Fourier transform infrared spectroscopy) was used to show how the extract accessible functional groups contributed to the reduction and capping of NPs. The X-ray diffraction validated the synthesised NPs crystalline structure. The cumulant hydrodynamic diameter of Po-AgNPs was measured by DLS to be 368.6 nm, with a PdI of 0.433. The zeta potential value was found to be –34.3 mV, indicating that the Po-AgNPs are more stable and have negative charge. When biosynthesised Po-AgNPs were evaluated for antioxidant activity using DPPH tests, Po-AgNPs showed greater antioxidant activity. The results indicates that the stability, purity, degree of crystallinity, and cubic form of NPs produced by Portulaca oleracea extract are excellent. In general, more investigation is needed to examine the potential health benefits of the Ag-NP-based P. oleracea aqueous extract.

Keywords

Portulaca-oleracea , silver , nanoparticles , FTIR , XRD , DLS , Zeta potential

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