Eco-friendly and green synthesis of silver nanoparticles using leaf extract of Strychnos potatorum Linn.F. and their bactericidal activities

Abstract

Inspired green synthesis of metallic nanoparticles is evolving as an important branch of nanotechnology. Traditionally these are manufactured by wet chemical methods which require toxic and flammable chemicals. We report for the first time an economic and eco-friendly green synthesis of silver nanoparticles using Strychnos potatorum aqueous leaf extract from 3 mM silver nitrate solution. Nanoparticles thus formed are confirmed and characterized by using UV–Vis absorption spectroscopy, SEM and XRD measurements. The XRD and SEM analysis showed the average particle size of nanoparticles as 28 nm as well as revealed their (mixed, i.e., cubic and hexagonal) structure. Further, these green synthesized nanoparticles showed bactericidal activity against multidrug-resistant human pathogenic bacteria.

Phytofabrication of silver nanoparticles using Myriostachya wightiana as a novel bioresource, and evaluation of their biological activities

“…It is now established that the plants and plant materials act as excellent reducing agents that catalyze bulk materials into nano form.Biological methods of nanoparticles production are regarded as safe, cost-effective, sustainable and environment friendly. Several biological systems including bacteria, fungi, algae and plants have been used in the synthesis of AgNPs [ 5,6,7,8 ].Nanoparticles produced by these methods have protective bio-capping around them, rendering the particles to be stable with no aggregation [ 9 ]. Synthesis of inorganic nanoparticles by biological systems makes nanoparticles more biocompatible and environmentally benign [ 10 ].…”

Synthesis of Silver Nanoparticles

“…Its formation is confirmed by using UV-visible spectroscopy and transmission electron microscopy or scanning electron microscopy. The most important plants like Alternanthera dentate [49], Cymbopogon citratus [50], Argyreia nervosa [51], phlomis [52], Aloe vera [53], Carica papaya [54], Nelumbo nucifera [55], Moringa oleifera [56], Ziziphora tenuior [57], Centella asiatica [58], Vitex negundo [59], Swietenia mahagoni [60], Boerhavia diffusa [61], Cocos nucifera [62], Brassica rapa [63], Melia dubia [64], Pogostemon benghalensis [65], Garcinia mangostana [66], Psoralea corylifolia [67], Portulaca oleracea [68], Trachyspermum ammi [69], Eclipta prostrate [70], Vitis vinifera [71], Thevetia peruviana [72], Calotropis procera [73], Premna herbacea [74], Ficus carica [75], Abutilon indicum [76], Terminalia chebula [77], Acorus calamus [78], Tinospora cordifolia [79], Ocimum tenuiflorum [80], bamboo hemicelluloses [81], Strychnos potatorum [82], Pine, Persimmon, Ginkgo, Magnolia, and Platanus [83] used by researchers in green synthesis.…”

“…The XRD and SEM analysis have shown the average particle size of nanoparticles as 28 nm as well as revealed their (mixed, i.e., cubic and hexagonal) structure. These nanoparticles have shown bactericidal activity against multidrug-resistant human pathogenic bacteria [82].…”

Biological Materials: Green Source Towards Silver Nanomaterials Synthesis

“…Spherical NP of 16-18 nm were synthesized. The NPs were found to be stable and showed good antibacterial properties against gram positive and gram negative bacteria S. aureus and K. pneumonia respectively 58 . In an attempt to synthesize AgNPs bark of a local tree (Afzelia quanzensis) from Zimbabwe was used.…”