Green synthesis of silver nanoparticles using aqueous extract of Acacia cyanophylla and its antibacterial activity
- Publish Date: 16 - September - 2021
Research Abstract:
This study aimed to synthesize silver nanoparticles through a green synthesis approach using Acacia cyanophylla extract as an eco-friendly, cost-effective, and efficient reducing agent, while evaluating the effects of preparation conditions on nanoparticle size and antibacterial activity. Silver nanoparticles were synthesized using aqueous silver nitrate and plant extract, and characterized by visual inspection, UV–Vis spectroscopy, dynamic light scattering (DLS), and scanning electron microscopy (SEM). The results confirmed the formation of silver nanoparticles by the appearance of a yellowish-brown color and an absorption peak at 460 nm, with an average particle size of 88.11 nm. The optimal synthesis conditions were achieved using aqueous extract at a 9:1 ratio (silver nitrate: extract), at 35°C for 48 hours, with stability maintained for up to 15 days at 5°C. Furthermore, the synthesized nanoparticles demonstrated strong antibacterial activity against Escherichia coli infection, with MIC values ranging from 3.125 to 12.5 μg/mL. These findings indicate that Acacia cyanophylla extract is an effective reducing agent for the preparation of stable silver nanoparticles with potent antibacterial properties.
Publishers:
