Biogenic synthesis of silver nanoparticles and their antioxidant and antibacterial activity

Bhakya, S.; Muthukrishnan, S.; Sukumaran, M.; Muthukumar, M.

doi:10.1007/s13204-015-0473-z

Cited by 384 publications

(227 citation statements)

References 39 publications

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“…Silver nanoparticles (stem bark (S), root (R) and leaf (L)) have been synthesized by Bhakya et al [19] method with slight modification. The formation of AgNPs is indicated by the appearance of dark brown color within 5 min.…”

Section: Synthesis Of Silver Nanoparticlesmentioning

confidence: 99%

Catalytic Degradation of Organic Dyes using Synthesized Silver Nanoparticles: A Green Approach

S¹,

M²,

MV³

2015

J Bioremed Biodeg

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The scientific community is search in for new methods for the synthesis of metallic nanoparticles. Green synthesis has now become a vast developing area of new research groups. Here we report a green method to the synthesis of silver nanoparticles (AgNPs) using the different parts of Vishanika or Indian screw tree, an ayurvedic medicinal tree. This is nontoxic, eco-friendly and low cost method. The reduction and stabilization capability of the plant extracts of different parts are described. The size and structure of the silver can be characterized by varying the plant parts of the vishanika. The biosynthesized nanoparticles are characterized by using UV-VIS spectroscopy, TEM, XRD, DLS and FTIR. The size and extract dependent catalytic activity of the biosynthesized nanoparticles is established in the degradation of organic dyes.plant products represent excellent platforms for this purpose [6][7][8]13]. The compounds present in plants that have different potential biological activities; phytochemicals are important natural resource for the synthesis of metal nanoparticles. They play important roles in both stabilization and reduction of nanoparticles. The focus of the present work is to apply the accurate principles of green chemistry for the synthesis of silver nanoparticles by using stem bark, root and leaf of Helicteres isora extracts as stand-alone reducing and capping agent. H. isora plant extracts possess anticancer properties [14]. Usually, the bark and root juice were used against diabetes and emphysema. In traditional medicine, the bark and root juice is claimed to be useful in snake bite, diabetes, blood disorder, cough, colic, diarrhoea, astringent, etc., [15], expectorant and astringent [16], hypolipidemic [17], antihyperglycemic activity and glibenclamide [18]. In the present study, we have investigated the extracts and size dependent catalytic degradation of organic dyes-methyl violet, safranin, eosin methylene blue and methyl orange by in the presence of silver colloids. Materials and MethodsSilver nitrate (99.99%), methyl violet, safranin, eosin methylene blue and methyl orange, were purchased from sigma Aldrich. All glassware's were cleaned with sterile distilled water and rinsed with deionized water. Preparation of extractDifferent parts of (stem bark, root and leaf) H. isora were collected from Western Ghats of Tamil Nadu, washed with sterile distilled water and dried, then make it powder. 1 g of each explants powder was mixed with 100 mL of water and kept on orbital shaker at 120 rpm for 12 h. After that, the extracts were filtered with filter paper and stored at 4 0 C in refrigerator until further use. Journal of Bior emediation & Biodegradation Synthesis of silver nanoparticlesSilver nanoparticles (stem bark (S), root (R) and leaf (L)) have been synthesized by Bhakya et al. [19] method with slight modification. The formation of AgNPs is indicated by the appearance of dark brown color within 5 min. CharacterizationUV-visible spectra analysis was performed for all samples and the abs...

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Section: Synthesis Of Silver Nanoparticlesmentioning

confidence: 99%

Catalytic Degradation of Organic Dyes using Synthesized Silver Nanoparticles: A Green Approach

S¹,

M²,

MV³

2015

J Bioremed Biodeg

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“…In earlier studies, Ag-NPs exhibited both significant scavenging of DPPH, H 2 O 2 , and ABTS, as well as significant metal chelating activity. [56][57][58][59][60][61][62][63] Iron is an important catalyst of lipid oxidation and a pro-oxidant due to its high reactivity. In the ferrous state, iron accelerates lipid oxidation by breaking down hydrogen and lipid peroxides to reactive free radicals.…”

mentioning

confidence: 99%

Biosynthesis, characterization, and evaluation of bioactivities of leaf extract-mediated biocompatible silver nanoparticles from an early tracheophyte,<em> Pteris tripartita</em> Sw.

Baskaran

Vigila

Thangaraj

et al. 2016

IJN

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“…In comparison to extract, AgNPs have shown less percentage of inhibition this may be due to the presence of less amount of functional group adhered to them. The FTIR result has suggested that hydroxyl and amine group were involved in synthesis and stabilization of silver nanoparticles thus the antioxidant property shown by silver nanoparticles is due to these functional groups (Bhakya et al, 2015). …”

Section: Antioxidant Analysismentioning

confidence: 99%

Biosynthesis of Silver Nanoparticles Using Ganoderma Lucidum and Assessment of Antioxidant and Antibacterial Activity

Poudel¹,

Pokharel²,

Sudip³

et al. 2017

Int J Appl Sci Biotechnol

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There is an increasing interest these days in the green route of synthesis of metal nanoparticles using plant extract, fungus and bacterial-mediated eco-friendly materials. Silver nanoparticles were synthesized using an intracellular extract of Ganoderma lucidum, a mushroom from Nepal then characterization of silver nanoparticles was performed. The Ag-NPs thus formed show surface plasmonic resonance with a maximum absorption band at 420 nm. Their crystalline nature was confirmed as a facecentered cubic structure by the XRD, Furthermore, SEM revealed that they were in the size range of 10-30 nm and were spherical in shape. The possible biomolecule involved in the reduction and stabilization of Ag-NPs were believed to be oxidized polyphenol, and carbonyl group, amino acid residue. Ag-NPs exhibit good antioxidant activity but showed low antioxidant in comparison to the fungal extract alone, which was studied using DPPH antioxidant assay. The effect of the colloidal silver nanoparticles solution against six human pathological bacteria was carried out by Disc diffusion method. The zone of maximum inhibition was seen in Bacillus subtilis (17.0 ± 0.13 mm) and least effective against Escherichia coli (10.1 ± 0.2 mm). Further, the results showed that Ag-NPs in combination with antibiotics have better antibacterial effect as compared with Ag-NPs alone.The maximum effect with a 3.2 and 5.3 fold increase was seen in Gentamicin and Streptomycin respectively providing the synergistic role of Ag-NPs. The results of antimicrobial studies indicated that the Ag-NPs are the metal of choice and can be effectively used in combination with antibiotics in order to improve their efficiency against various pathogenic microbes.

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Biogenic synthesis of silver nanoparticles and their antioxidant and antibacterial activity

Cited by 384 publications

References 39 publications

Catalytic Degradation of Organic Dyes using Synthesized Silver Nanoparticles: A Green Approach

Catalytic Degradation of Organic Dyes using Synthesized Silver Nanoparticles: A Green Approach

Biosynthesis, characterization, and evaluation of bioactivities of leaf extract-mediated biocompatible silver nanoparticles from an early tracheophyte,<em> Pteris tripartita</em> Sw.

Biosynthesis of Silver Nanoparticles Using Ganoderma Lucidum and Assessment of Antioxidant and Antibacterial Activity

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