scholarly journals Effect of pH on Size and Concentration of Silver Nanoparticles Synthesized using Ixora coccinea Linn. Leaf Extracts

2020 ◽  
Vol 36 (6) ◽  
pp. 1103-1106
Author(s):  
Darwin F. Reyes ◽  
Gil Fabien S. Cabrera ◽  
Shemma Mica V. Mata ◽  
azmin Pariz D. San Pedro ◽  
add Christian C. Palioc ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Cost Effective ◽  
The Philippines ◽  
Reducing Agent ◽  
Leaf Extracts ◽  
Reaction Conditions ◽  
Effect Of Ph ◽  
Ixora Coccinea ◽  
Ornamental Shrub

The synthesis of silver nanoparticles via plant-mediated approach is an emerging area of research interest worldwide. The procedure is cost-effective and does not require the use of toxic chemicals and complicated reaction conditions. In the present investigation, silver nanoparticles were prepared using the leaf extracts of Ixora coccinea Linn., a common ornamental shrub in the Philippines, as the reducing agent. The effect of pH on the synthesis was investigated, and results showed that the quality of the synthesized silver nanoparticles changes in varying pH of the reducing agent.

scholarly journals Antioxidant and Antibacterial Activities of Biosynthesized Silver Nanoparticles using Aqueous Terminalia catappa Leaf Extracts as Novel Reducing Agent

2020 ◽  
Vol 32 (8) ◽  
pp. 2079-2083
Author(s):  
Paweena Porrawatkul ◽  
Rungnapa Pimsen ◽  
Saksit Chanthai ◽  
Prawit Nuengmatcha
Keyword(s):  
Particle Size ◽  
Silver Nanoparticles ◽  
Leaf Extract ◽  
Particle Size Analysis ◽  
Reducing Agent ◽  
Size Analysis ◽  
Main Peak ◽  
Leaf Extracts ◽  
Characteristic Functional ◽  
Terminalia Catappa

In this study, silver nanoparticles (AgNPs) were successfully synthesized from aqueous Terminalia catappa leaf extract that acts as a novel reducing agent. Various parameters, including pH, temperature and reaction time, were determined. The UV-visible spectra showed the main peak at 416 nm, which was the characteristic surface plasmon resonance of AgNPs. The spherical shape and particle size of 49 ± 0.01 nm were observed from SEM, TEM and laser particle size analysis (LPSA). FTIR spectra of the leaf extract exhibited the characteristic functional groups that should be responsible for Ag+ ion reduction. The EDX spectrum proved that the obtained sample is silver. The antioxidant activity of AgNPs treated with the leaf extract as determined by the DPPH assay was higher compared to that of Terminalia catappa leaf extract, and the treated AgNP sample exhibited high antibacterial potential against both Gram-positive and Gram-negative bacteria.

scholarly journals Cost Effective Purification of Tannery Waste Water Using Biosynthesized Silver Nanoparticles

2021 ◽  
Vol 37 (3) ◽  
pp. 667-672
Author(s):  
A. Arputharaj ◽  
P. Anbarasu
Keyword(s):  
Silver Nanoparticles ◽  
Cost Effective ◽  
Root Extract ◽  
Health Issues ◽  
Chemical Parameters ◽  
Quality Of Water ◽  
Physico Chemical ◽  
Tannery Waste Water ◽  
Physical And Chemical

The nanotechnology has reached a greater extent of the research and now it is considered as the best source of alternative in the present world. Nowadays, the contaminants present in the water should be very difficult to remove and it leads to several health issues. It is the primary requisite to know about the different physico-chemical parameters to check the quality of water. Currently, the nanotechnology has been the emerging technology and the green synthesis is acclimating to eco-friendly, non-toxic and this method reduces the pollution. This biological approach is undertaken to diminish toxicity and to reduce pollution. In these current studies, the silver nanoparticles can be synthesized from chrysopogan zizanioides root extract. The synthesised silver nanoparticles were characterized by UV-Vis, TEM, physical and chemical parameters of water quality. The synthesised silver nanoparticles were used to reduce the chemical effluents. The outcome of the synthesis silver nanoparticles is using the vital route of wastewater treatment and also effectively reduces the water contaminations.

Synthesis of Silver Nanoparticles Using the Leaf Extract of Vitex negundo and its Anti-Bacterial Effect

2013 ◽  
Vol 678 ◽  
pp. 301-305 ◽  
Author(s):  
Gunasekaran Bhavani ◽  
Paulsamy Muthuselvam ◽  
Subramanian Geetha
Keyword(s):  
Silver Nanoparticles ◽  
Synthesis Method ◽  
Nanoparticle Synthesis ◽  
Cost Effective ◽  
Klebsiella Pneumonia ◽  
The Novel ◽  
Vitex Negundo ◽  
X Ray Diffraction ◽  
Leaf Extracts

Silver nanoparticles are known to have antimicrobial activity. The green synthesis method of nanoparticle synthesis is one of the most cost effective and eco friendly method. The present study is based on the synthesis of silver nanoparticles by the self reduction of silver nitrate by the leaf extracts of Vitex negundo which is one of the novel methods used in developing nanoparticles. The characterization of the particle was done by UV-Vis spectrophotometer, Fourier Transform Infra Red Spectroscopy, X-ray Diffraction analysis and the size of the synthesized nanoparticle was analyzed in the Scanning Electron Microscopy. The size of the particle was found to be 56 nm. The obtained silver nanoparticles showed anti-microbial activity against E.coli and Klebsiella pneumonia.

scholarly journals Green Synthesis and Optimization of Silver Nanoparticles from Piper betel and Jatropha curcas to Enhance α-Amylase Activity

2019 ◽  
Vol 31 (12) ◽  
pp. 2969-2975
Author(s):  
R. Halima ◽  
Archna Narula
Keyword(s):  
Silver Nanoparticles ◽  
Jatropha Curcas ◽  
Reaction Medium ◽  
Reducing Agent ◽  
Ion Concentration ◽  
Leaf Extracts ◽  
Green Approach ◽  
Visible Spectra ◽  
Stable Particles ◽  
Important Enzyme

In the present study, the catalytic nature of silver nanoparticles was studied in the reaction mixture with amylase enzyme. Amylase is an industrially important enzyme that catalyzes the decomposition of starch into glucose. The silver nanoparticles in the study were synthesized using a green approach where the leaf extracts of Piper betel and Jatropha curcas act as reducing agent in reducing silver nitrate to silver nanoparticles. The reaction medium was optimized for better yield by altering the parameters like pH, temperature, silver ion concentration, reducing agent concentration and irradiation and hence the improvement in yield of silver nanoparticles was noticed. Moreover, the synthesized silver nanoaprticles were confirmed through UV-visible spectra, FTIR, SEM and EDX spectra. By optimizing, more stable particles were synthesized with a size of about 41 nm from both the leaf extracts. The synthesized nanoparticles were added in the reaction mixture with α-amylase and the reaction rate was enhanced to about three-folds in comparison with that without silver nanoparticles

scholarly journals Leaf Extracts Silver Nanoparticles of Four Medicinally Important Plants: Used as a Green Manure

2020 ◽  
pp. 1-8
Author(s):  
Sk Md Abu Imam Saadi ◽  
Amal Kumar Mondal
Keyword(s):  
Silver Nanoparticles ◽  
Seed Germination ◽  
Germination Rate ◽  
Germination Percentage ◽  
Biomedical Science ◽  
Leaf Extracts ◽  
Plant Samples ◽  
Indigenous Plant ◽  
Average Size

Now a day’s green synthesis of silver nanoparticles (AgNPs) from plants has an important role in biomedical science, drug discovery and also in biological field. In this investigation, we synthesize AgNPs using the aqueous solution of the leaf extract of 4 indigenous plant samples such as –Abroma augusta, Barringtonia acutangula, Dillenia indica & Eupatorium odoratum in room temperature (35±2°C). After that, formation of AgNPs were confirmed by UV-VIS spectrum, the answered (435, 445, 430 & 440 nm), respectively. The average size of the AgNPs also confirmed by Particle size analyser (PAS), the B. acutangular species showed the best quality of silver nanoparticles among the other plant extracts. FTIR analysis showed that five biomolecule groups like phenols, aromatic, alkyne, alkane and alkene were found in among these plant samples. Our findings suggest that the seed germination percentage, relative seed germination rate, relative shoot & root growth and germination index of the tested plant depends upon concentration gradient of synthesize AgNPs. At 0.6 mg/ml concentration, the tested plant samples give the best favorable growth condition.

scholarly journals BIOFABRICATION OF SILVER NANOPARTICLES USING LEAVES OF GLORIOSA SUPERBA AND ITS ANTICANCER PROPERTIES

2017 ◽  
Vol 10 (11) ◽  
pp. 65 ◽  
Author(s):  
Murali Satyanarayana Bethu ◽  
Venkateswara Rao J
Keyword(s):  
Silver Nanoparticles ◽  
Cell Line ◽  
Cost Effective ◽  
Skov3 Cell ◽  
Gravimetric Analysis ◽  
Gloriosa Superba ◽  
Leaf Extracts ◽  
One Pot ◽  
Anticancer Properties ◽  
Skov3 Cells

  Objective: We aimed to synthesize the cost effective, one pot and an eco-friendly technique for the green synthesis of silver nanoparticles (AgNPs) using 1 mM of silver nitrate (AgNO3) solution through the aqueous leaf extracts of Gloriosa superba (GS) reducing and capping agent and its anticancer activity.Methods: Synthesis briefly 95 mL of 1 mM AgNO3 was taken into amber colored conical flask and added 5 mL of aqueous leaf extract of GS (pale brown) and incubated at room temperature in dark condition for about 24 hrs. Characterization of AgNPs derived from GS (GS-AgNPs) was performed with physiochemical techniques (ultraviolet, transmission electron microscope [TEM], X-ray diffraction [XRD], and thermal gravimetric analysis) and cytotoxicity by 3-(4,5-dimethylthiazo-2-yl)-2,5-diphenyltetrazolium bromide assay.Results: We synthesized cost effective, eco-friendly AgNPs were characterized by physiochemical techniques. The crystal nature of AgNP was studied by XRD. TEM studies reveal the morphology of GS-AgNPs, the size of the nanoparticle is 10-50 nm. The cytotoxicity of GS-AgNPs studied against the four human cancerous cell line DU145, SKOV3, PC3, and A549 but the GS-AgNPs are most sensitive toward the SKOV3 cell line. The minimum inhibitory concentration (IC) is 79.45±5.26, 61.80±4.27, 94.74±9.26, and 90.10±8.24 μg/mL, respectively. Morphological assessment of the SKOV3 cells was studied using AO/EB and Hoechst staining at IC50 concentration.Conclusion: The bio fabrication of the GS-AgNPs were simple, eco-friendly and one pot synthesis, it is used as an anticancer agent in future, pending further investigation.

scholarly journals Larvicidal Activity of Silver Nanoparticles Synthesized Using Extracts ofAmbrosia arborescens(Asteraceae) to ControlAedes aegyptiL. (Diptera: Culicidae)

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Bianca Morejón ◽  
Fernanda Pilaquinga ◽  
Flavia Domenech ◽  
Danny Ganchala ◽  
Alexis Debut ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Larvicidal Activity ◽  
Plant Extract ◽  
Mosquito Species ◽  
Cost Effective ◽  
Leaf Extracts ◽  
Suitable Alternative ◽  
Nontarget Effects ◽  
Primary Vector ◽  
Green Synthesized Silver Nanoparticles

The mosquito speciesAedes aegyptiis the primary vector of dengue, chikungunya, and Zika infections worldwide. Since effective vaccines or drugs are not available for the prevention and/or treatment of these pathologies, vector control has been adopted as the main approach to reduce their transmission. To controlAedespopulations, the most commonly used tool is the application of chemical insecticides and, despite their effectiveness, indiscriminate use of these chemicals has led to high operational costs, appearance of resistant populations, and adverse nontarget effects. Plant-derived insecticides may be an eco-friendly, cost-effective, and safe biocontrol alternative. The present study was carried out to evaluate the larvicidal activity of leaf extracts ofAmbrosia arborescensand green-synthesized silver nanoparticles (AgNPs) using aqueous extracts obtained from this plant against third instar larvae ofAe. aegypti. To test this, larvae were exposed for 24 h to the aqueous plant extract at 1500, 3000, 4500, and 6000 ppm and the plant-synthesized AgNPs at 0.2, 0.3, 0.4, and 0.5 ppm. In laboratory assays, AgNPs were more toxic (LC50 = 0.28 ppm; LC90 = 0.43 ppm) than the plant extract (LC50 = 1844.61 ppm; LC90 = 6043.95 ppm). These results suggest thatA. arborescensaqueous extract and green-synthesized silver nanoparticles produced from those extracts have the potential to be developed into suitable alternative tools useful for the control ofAe. aegyptipopulations.

scholarly journals Nanoengineering of eco-friendly silver nanoparticles using five different plant extracts and development of cost-effective phenol nanosensor

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Siwar Jebril ◽  
Alaeddine Fdhila ◽  
Chérif Dridi
Keyword(s):  
Silver Nanoparticles ◽  
Water Samples ◽  
High Sensitivity ◽  
Cost Effective ◽  
Water Quality Monitoring ◽  
Melia Azedarach ◽  
Leaf Extracts ◽  
Highly Sensitive ◽  
Phenol Determination ◽  
Silver Nps

AbstractThe production of environmentally friendly silver nanoparticles (AgNPs) has aroused the interest of the scientific community due to their wide applications mainly in the field of environmental pollution detection and water quality monitoring. Here, for the first time, five plant leaf extracts were used for the synthesis of AgNPs such as Basil, Geranium, Eucalyptus, Melia, and Ruta by a simple and eco-friendly method. Stable AgNPs were obtained by adding a silver nitrate (AgNO3) solution with the leaves extract as reducers, stabilizers and cappers. Only, within ten minutes of reaction, the yellow mixture changed to brown due to the reduction of Ag+ ions to Ag atoms. The optical, structural, and morphology characteristics of synthesized AgNPs were determined using a full technique like UV–visible spectroscopy, FTIR spectrum, XRD, EDX spectroscopy, and the SEM. Thus, Melia azedarach was found to exhibit smaller nanoparticles (AgNPs-M), which would be interesting for electrochemical application. So, a highly sensitive electrochemical sensor based on AgNPs-M modified GCE for phenol determination in water samples was developed, indicating that the AgNPs-M displayed good electrocatalytic activity. The developed sensor showed good sensing performances: a high sensitivity, a low LOD of 0.42 µM and good stability with a lifetime of about one month, as well as a good selectivity towards BPA and CC (with a deviation less than 10%) especially for nanoplastics analysis in the water contained in plastics bottles. The obtained results are repeatable and reproducible with RSDs of 5.49% and 3.18% respectively. Besides, our developed sensor was successfully applied for the determination of phenol in tap and mineral water samples. The proposed new approach is highly recommended to develop a simple, cost effective, ecofriendly, and highly sensitive sensor for the electrochemical detection of phenol which can further broaden the applications of green silver NPs.

scholarly journals Green Silver Nanoparticles Formed by Phyllanthus urinaria, Pouzolzia zeylanica, and Scoparia dulcis Leaf Extracts and the Antifungal Activity

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 542 ◽  
Author(s):  
Dai Nguyen ◽  
Jung Lee ◽  
Ki Park ◽  
Yern Ching ◽  
Xuan Nguyen ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Electron Microscope ◽  
Fourier Transforms ◽  
Cost Effective ◽  
Leaf Extracts ◽  
Scoparia Dulcis ◽  
Phyllanthus Urinaria ◽  
Transmission Electron ◽  
Agricultural Applications ◽  
Herbal Plant

Phytoconstituents presenting in herbal plant broths are the biocompatible, regenerative, and cost-effective sources that can be utilized for green synthesis of silver nanoparticles. Different plant extracts can form nanoparticles with specific sizes, shapes, and properties. In the study, we prepared silver nanoparticles (P.uri.AgNPs, P.zey.AgNPs, and S.dul.AgNPs) based on three kinds of leaf extracts (Phyllanthus urinaria, Pouzolzia zeylanica, and Scoparia dulcis, respectively) and demonstrated the antifungal capacity. The silver nanoparticles were simply formed by adding silver nitrate to leaf extracts without using any reducing agents or stabilizers. Formation and physicochemical properties of these silver nanoparticles were characterized by UV-vis, Fourier transforms infrared spectroscopy, scanning electron microscope, transmission electron microscope, and energy dispersive X-ray spectroscopy. P.uri.AgNPs were 28.3 nm and spherical. P.zey.AgNPs were 26.7 nm with hexagon or triangle morphologies. Spherical S.dul.AgNPs were formed and they were relatively smaller than others. P.uri.AgNPs, P.zey.AgNPs and S.dul.AgNPs exhibited the antifungal ability effective against Aspergillus niger, Aspergillus flavus, and Fusarium oxysporum, demonstrating their potentials as fungicides in the biomedical and agricultural applications.

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