Green Synthesis of Silver Nanoparticles of Morus Rubra Leaves Extract (original) (raw)
Related papers
2018
In this work, silver nanoparticles (AgNPs) were synthesized rapidly and eco-friendlily using the extract of Mulberry leaves and aqueous solution of silver nitrate without any toxic chemical [1,2]. The Mulberry leaves extract acts as both reducing agent and stabilizing agent. The UV-Vis spectrum shows peak at 430 nm. The TEM image of synthesized AgNPs sample shows spherical shaped particles whose size range from 15 to 20 nm. TEM image of nano silver solution sample synthesized by microwave assisted method shows nearly spherical particles with an average particle size of 10 nm. The absorption UV-vis spectrum of silver nanoparticles synthesized by microwave assisted method (AgNPsmw) shows a sharp absorption band around 415 nm. After two month storage of AgNPsmw, the absorption spectrum of AgNPsmw was taken again. The UV-Vis spectrum shows negligible peak changes of silver nanoparticles have occurred after two months of storage. The synthesized AgNPs material could be used as an antimic...
Green Synthesis of Silver Nanoparticles byMulberry LeavesExtract
Nanoscience and Nanotechnology, 2012
Utilizing the reduced property of mulberry leaves extract and silver nit rate, silver nanoparticles (AgNPs) were synthesized at room temperature. Silver nanoparticles were characterized using UV-v isible absorption spectroscopy, scanning electron microscopy (SEM) andX-ray diffract ion (XRD).Further, silver nanoparticles showed effective antibacterial activity toward StaphylococcusaureusandShigella sp..
Microwave Assisted Green Synthesis of Silver Nanoparticles Using Coleus Amboinicus Leaf Extract
International Journal of Applied Pharmaceutics
Objective: Current study is aimed at the formulation of silver nanoparticles loaded with the extract of Coleus amboinicus leaf extract by microwave irradiation. A facile and green synthesis of silver nanoparticles by using a biological agent such as plant extracts with the aid of microwave irradiation is proposed as an economical and environmentally friendly approach alternative to chemical and physical methods. Methods: In order to fabricate silver nanoparticles by microwave irradiation, aqueous extract of leaves Coleus amboinicus (CA) were treated with aqueous silver nitrate solution and mixture was placed in the microwave oven for exposure to microwave. Optimizations of the process were carried out by varying the quantity of extract, silver nitrate concentration and duration of microwave irradiation. Formations of nanoparticles were confirmed by UV-visible spectroscopy observing for the presence of surface plasmon resonance (SPR) peak. Nanoparticles were characterized by scanning...
There is a huge demand of silver nanoparticles in the global market due to their special properties and applications in different fields such as nanomedicine , dentists , nanocatalysis, nanoelectronics, textile field, waste water treatment.The major cons of top down and Bottom up methods are the synthesis processes are highly costly, time consuming and many harmful chemicals are used. To reduce these problems Green chemistry comes to play a very important role for making of silver nanoparticles. Use of various plant extracts like leaves, fruits for synthesis of biogenic silver nanoparticles referred as Green Nanotechnology. In the present work we reported the green synthesis of silver nanoparticles using by Mulberry leaves extract without using any toxic chemicals. The Mulberry leaves extract act as reducing agent as well as a stabilizing agent in green nanotechnology process. The making of silver nanoparticles was determined by the change of shade from white to brownish by the addition of Mulberry leaves extract . UV-Vis absorption spectroscopy was used to monitor the measurable formation of silver nanoparticles showed a maximum peak at 440 nm. High resolution Transmission electron microscope confirmed the spherical nature and the highly crystallinity of silver nanoparticles on an average size 15 -25 nm .Antimicrobial activity of the biogenic Ag nanoparticles was performed by a well diffusion method. The nanoparticles exhibited enhanced anti-bacterial activity when incubated in Escherichia Coli and Bacillus Subtilis cultured plates at varied volumes. Current study thus presents a facile and innovative strategy for synthesis of silver nanoparticles.
Synthesis and characterization of silver nanoparticles via green route
Korean Journal of Chemical Engineering, 2016
The development of competent green chemistry methods for synthesis of metal nanoparticles has become a main focus of researchers. In this study we report the green synthesis of silver nanoparticles (AgNps) by reduction of silver nitrate, using leaf broth of Azadirakta indica (Neem). The plant leaf broth simultaneously acts as reducing agent as well as capping agent at 30 o C. The effect of different concentration of silver ions, percentage of leaf broth and temperature on morphology of dispersed silver nanoparticles was studied. The formation of silver nanoparticles in dispersion was monitored through the analysis of absorbance spectra by UV-Visible spectrophotometer at different stages during the process of synthesis. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis revealed that silver nanoparticles were pure and monodispersed and size was ranging from 9-56 nm. Fourier transform infrared (FTIR) analysis indicates prominent bands of absorbance, which are responsible for reducing of Ag + ions and stabilization of obtained silver nanoparticles. Results confirmed this protocol as simple, rapid, cost effective, eco-friendly and alternative conventional physical/chemical methods.
Green Synthesis of Silver Nanoparticles Using Alagaw Leaf Extract
Green Synthesis of Silver Nanoparticles Using Alagaw (Premna odorata) Leaf Extract, 2019
Abstract. There is a worldwide interest in silver nanoparticles (AgNPs) synthesize by various chemical reactions for use in applications. Silver nanoparticles have gained significant interest due to their unique optical, antimicrobial, electrical, physical properties and their possible application. However, it is necessary to develop environmental friendly methods for their syntheses. To avoid chemically toxicity, biosynthesis of metal silver nanoparticles is proposed as a cost-effective and environmental friendly alternative. This study aimed to find out whether Alagaw plant can potentially act as a reducing agent for the biosynthesis of silver nanoparticles and whether the concentration of the leaf extract can affect the absorbance spectrum, size and shape of the synthesized silver nanoparticles. The synthesized silver nanoparticles were characterized using the UV-vis spectroscopy for its absorbance spectrum and Transmission Electron Microscope Analysis for its morphology and size. The experimental method of research was used using three treatments and replicates of the different concentrations of Alagaw leaf extract: Treatment A (0.2 g/mL), Treatment B (0.4 g/mL) and Treatment C (0.6 g/mL) with 10 minutes and 60 minutes interval of observation under UV-vis spectrophotometer. Based on the findings of the study, Alagaw plant can potentially act as a good reducing agent for the biosynthesis of silver nanoparticles. The results recorded from UV-vis spectrophotometer support the biosynthesis and characterization of silver nanoparticles that as the concentration of the leaf extract increases it significantly affect the wavelength peaks and absorbance peaks of the synthesized silver nanoparticles. Using the high-resolution Transmission Electron Microscopy, the size of silver nanoparticles measured 50 nm – 100 nm having near-spherical in shape. Keywords: Nanoparticles, Biosynthesis, Spectroscopy, Absorbance Spectrum
Zenodo (CERN European Organization for Nuclear Research), 2020
Silver nanoparticles (AgNPs) are gaining attention because of its wide application in medical science as antimicrobial and antibacterial properties. A conventional method for synthesis of AgNPs consumes hazardous chemicals and during production of NPs harmful by-products may also form. Proposed review suggests "greener technology" for synthesis of silver nanoparticles with the help of easily available plants. Aqueous extract of leaf or roots of Impatiens balsamina, Lantana camara, Eriobotrya japonica, Berberis vulgaris, Azadirachta indica, Psidium guajava, Moringa oleifera and Catharanthus roseus and other plant extracts are used as reducing agents to convert Ag + into Ag 0. Light or faint color of plant extract after addition of AgNO 3 turns to brown or deep brown in color, indicates the formation of AgNPs. Fourier Transform Infra Red Spectroscopy (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Tunneling Electron Microscopy (TEM) and Dynamic Light Scattering Spectroscopy (DLSS) are techniques employed for characterization and morphological analysis of synthesized silver nanoparticles. Antibacterial, antifungal and antiparacitic applications of synthesized AgNPs have been also discussed. It is concluded that AgNPs synthesized by green way has great potency towards both Gram-negative and Gram-positive bacteria. Moreover, green synthesis of silver nanoparticles is a nonhazardous, eco-friendly, economic and safe technique and will envisaged better option for synthesis of AgNPs.
Silver Nanoparticles Ecofriendly Green Synthesis by Using Two Medicinal Plant Extract
TJPRC, 2013
Nanotechnology in present era gaining value due to capability of modulating metals in to their nanoparticles. There are few studies which are paying attention on the effects and mechanisms of nanomaterials on plants. The present research prominence on the biological synthesis of silver nanoparticle using herbal extract a natural biopolymer, acting as a reducing and stabilizing agent. In green synthesis we used natural reducing agents to synthesize nanoparticles (in this case silver nanoparticles). The leaves were found to be a good reducing as well as capping agent which can rapidly reduces silver ions (Ag+ to Ag). The characteristic color changes from pale yellow to dark brown in the reaction due to their specific properties (Surface Plasmon Resonance). Characterization of newly synthesized silver nanoparticle was made using UV – Visible spectroscopic technique. The UV-Vis spectrum of green synthesized silver nanoparticle from Jasminum grandiflorum and Cymbopogon citrullus have maximum absorbance peaks at 206.50 and 199.00 respectively. This study focus on a cost efficient ecofriendly and safe technique for the synthesis of silver nanoparticle using leaves of important medicinal plants.
Artificial Cells Nanomedicine and Biotechnology, 2017
The fabrication of spherical silver nanoparticles using the phytoreducing agent Elephantopus scaber is reported here. Irradiation of the reaction mixture under a domestic microwave oven enabled the formation of stable silver nanoparticles and was confirmed by UV-vis spectral portrait. Chemical components inherent in the aqueous leaf extract which reduces the monovalent silver were identified by FT-IR spectroscopy. The crystal structure of the synthesized nanoparticles was established as face centred cube by the powder XRD analysis. The TEM images suggest an average particle size of 37.86 nm to the silver nanoparticles. The prepared silver nanocatalysts can successfully reduce various organic nitro compounds, namely, 4-nitrophenol, 2-nitroaniline and 4-nitroaniline. The environmental pollution caused by dyes like eosin Y is effectively wiped off within a short span of time using the prepared nanocatalysts. The free radical quenching efficacy of the plant extract and the silver nanoparticles were checked by employing DPPH assay bestowing ascorbic acid reference. The potential of the nanoparticles as antimicrobials against six human disease causing pathogens were tested through the well diffusion pathway. The newly developed silver nanoparticles produced IC 50 value 15.68 ± 0.15 lg/mL on human skin carcinoma cells, A375 and 65.49 ± 0.40 lg/mL on fibroblast cells, L929 when the cytotoxicity is studied employing MTT assay. Elephantopus scaber showed IC 50 value 50.55 ± 0.17 lg/mL against A375 cells.
PLANT MEDIATED SYNTHESIS AND CHARACTERIZATION OF SILVER NANOPARTICLES
International journal of Pharmacy and Pharmaceutical Sciences, 2014
Objective: The study was aimed to synthesis and characterization of silver nanoparticles from five different herbal plants (Terminalia chebula, Mimusops elengi, Myristica fragrans, Centella asiatica and Hemidesmus indicus). Methods: The qualitative analysis of plant extracts was performed to determine the presence of secondary metabolites. The plant mediated silver nanoparticles were synthesized. The color changed into brown to black color indicating the formation of AgNPs. The characterization of synthesized AgNPs was carried out by different methods such as UV-Vis Spectra, FE-TEM, Particle size analysis, Zeta potential analysis, XRD and FTIR. The antimicrobial activity of synthesized silver nanoparticles also examined against three fungi and bacteria. Results: The UV wave length of AgNPs is from 300 to 450 nm. The average size of AgNPs 581 d.nm, zeta potential is-13.3 mV. The FTIR results show that AgNPs contains the functional groups. In antimicrobial activity of all AgNPs synthesized by five plants inhibits the growth of bacteria and Terminalia chebula showed maximum effect. The XRD pattern clearly confirmed that the synthesized silver nanoparticles are crystalline in nature. TEM results shows that synthesized silver nanoparticles are round in shape. Conclusion: The green synthesis of nanoparticles shows that cost-effective, environmentally friendly, and safe for human therapeutic use. Color change, UV-Vis spectra, TEM and XRD analysis confirmed the stability of synthesized AgNPs.