Ultra-sonication enhanced green synthesis of silver nanoparticles using Barleria buxifolia leaf extract and its possible application

2021 ◽  
Author(s):  
Vanaraj sekar
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Leaf Extract ◽  
Cancer Cell Line ◽  
Xrd Analysis ◽  
Blue Dye ◽  
Multiple Use ◽  
Uniform Size ◽  
X Ray ◽  
Vis Spectroscopy

Abstract A simple and eco-friendly method for the green synthesis of silver nanoparticles (AgNPs) by ultrasound-assisted strategy using Barleria buxifolia leaf extract as a reducing and capping agent was established in this study. The obtained AgNPs were characterized. UV-vis spectrum, Fourier transform infrared spectroscopy (FTIR), scanning and transmission electron microscopy (SEM and TEM), Energy Dispersive X-Ray Analyzer (EDX), X-ray diffraction, dynamic light scattering (DLS) analysis showed that the obtained AgNPs were mono dispersed spheres with uniform size of 80 nm. UV-vis spectroscopy, FTIR, and XRD analysis indicated that the surface of the obtained AgNPs was covered with organic molecules in plant extracts. The results of ABTS assays showed that high antioxidant activity was seen in the obtained AgNPs. Green synthesized AgNPs showed potent antibacterial and anti-biofilm activity against tested pathogens. Cytotoxicity assay showed that the obtained AgNPs were significantly cytotoxic to cancer cell line (MCF-7). In addition, the AgNPs synthesized in this paper can also photo catalytically degrade methylene blue dye under visible light. The potent bioactivity exhibited by the green synthesized silver nanoparticles leads towards the multiple use as antioxidant, antibacterial, anti-biofilm, cytotoxic as well as photo catalytic agent.

scholarly journals Optimization of Green Synthesis of Silver Nanoparticles from Leaf Extracts ofPimenta dioica(Allspice)

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Akshay Rajeev Geetha ◽  
Elizabeth George ◽  
Akshay Srinivasan ◽  
Jameel Shaik
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Leaf Extract ◽  
Synthesis Method ◽  
Leaf Extracts ◽  
Synthesis Of Nanoparticles ◽  
Hot Air ◽  
Vis Spectroscopy ◽  
Pimenta Dioica ◽  
First Time

Production of silver nanoparticles from the leaf extracts ofPimenta dioicais reported for the first time in this paper. Three different sets of leaves were utilized for the synthesis of nanoparticles—fresh, hot-air oven dried, and sun-dried. These nanoparticles were characterized using UV-Vis spectroscopy and AFM. The results were diverse in that different sizes were seen for different leaf conditions. Nanoparticles synthesized using sun-dried leaves (produced using a particular ratio (1 : 0.5) of the leaf extract sample and silver nitrate (1 mM), resp.) possessed the smallest sizes. We believe that further optimization of the current green-synthesis method would help in the production of monodispersed silver nanoparticles having great potential in treating several diseases.

scholarly journals Green Synthesis and Catalytic Activity of Silver Nanoparticles Based on Piper chaba Stem Extracts

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1777 ◽  
Author(s):  
Md. Mahiuddin ◽  
Prianka Saha ◽  
Bungo Ochiai
Keyword(s):  
Electron Microscopy ◽  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Ftir Spectroscopy ◽  
Visual Observation ◽  
Face Centered Cubic ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Face Centered ◽  
Average Size

A green synthesis of silver nanoparticles (AgNPs) was conducted using the stem extract of Piper chaba, which is a plant abundantly growing in South and Southeast Asia. The synthesis was carried out at different reaction conditions, i.e., reaction temperature, concentrations of the extract and silver nitrate, reaction time, and pH. The synthesized AgNPs were characterized by visual observation, ultraviolet–visible (UV-vis) spectroscopy, dynamic light scattering (DLS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), x-ray diffraction (XRD), energy dispersive x-ray (EDX), and Fourier transform infrared (FTIR) spectroscopy. The characterization results revealed that AgNPs were uniformly dispersed and exhibited a moderate size distribution. They were mostly spherical crystals with face-centered cubic structures and an average size of 19 nm. The FTIR spectroscopy and DLS analysis indicated that the phytochemicals capping the surface of AgNPs stabilize the dispersion through anionic repulsion. The synthesized AgNPs effectively catalyzed the reduction of 4-nitrophenol (4-NP) and degradation of methylene blue (MB) in the presence of sodium borohydride.

scholarly journals Green synthesis of Ag/TiO2 Nanocomposite Assisted by Gambier Leaf (Uncaria gambir Roxb) Extract

2019 ◽  
Vol 22 (6) ◽  
pp. 250-255 ◽  
Author(s):  
Sry Wahyuni ◽  
Syukri Syukri ◽  
Syukri Arief
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Diffuse Reflectance Spectroscopy ◽  
Irradiation Time ◽  
Rutile Phase ◽  
X Ray Diffraction ◽  
Silver Surface ◽  
X Ray ◽  
Synthesis Of Nanoparticles ◽  
Vis Spectroscopy

Studies of green synthesis of nanoparticles mediated by plants extract is extensively explored and studied in recent time due to eco-friendliness, cost-effectiveness, and use a minimum amount of toxic chemicals in the process of inorganic material synthesis. In this study, the immobilization of silver nanoparticles on the surface of titanium dioxide (TiO2) was carried out using Uncaria gambier Roxb. leaf extract as a silver ion (Ag+) reducing agent. The synthesized Ag/TiO2 nanocomposite was characterized by UV-Vis spectroscopy, X-ray diffraction (XRD), and Diffuse Reflectance Spectroscopy (DRS). The formation of silver nanoparticles was confirmed through UV-Vis spectroscopic analysis, which showed a silver surface plasmon resonance (SPR) band at 426 nm. The X-ray diffraction pattern shows that Ag can inhibit the transition of the anatase into rutile phase. The presence of Ag particles in TiO2 can increase the absorption ability from an initial wavelength of 407 nm to 438 nm. Based on the results of Rhodamin B degradation, it can be seen that Ag/TiO2 has a higher photocatalytic activity than bare TiO2 with 99% percent degradation at 120 minutes of irradiation time.

scholarly journals Green synthesis and antibacterial activity studies of silver nanoparticles from the aqueous extracts of Thespesia populnea

2020 ◽  
Vol 9 (1) ◽  
pp. 931-934
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Green Synthesis ◽  
Inhibitory Concentration ◽  
Xrd Analysis ◽  
Leaf Extracts ◽  
Swarming Motility ◽  
Thespesia Populnea ◽  
Vis Spectroscopy ◽  
Test Organisms

Green synthesis of silver nanoparticles were carried out using the aqueous leaf extracts of Thespesia populnea and characterised by UV Vis spectroscopy, SEM, EDX, AFM and XRD analysis. The silver nanoparticles when tested on Pseudomonas aeruginosa and Bacillus subtilis, was found to have potent antibacterial activity. Further, the microbes were susceptible for a minimum inhibitory concentration of 0.5 µg and also arrested the swarming motility of the test organisms. The nanoparticles interacted with the microbial membrane which led to the leakage of proteins from the cells.

scholarly journals Green Synthesis of Silver Nanoparticles using Strobilanthes flaccidifolius Nees. Leaf Extract and its Antibacterial Activity

2016 ◽  
Vol 8 (1) ◽  
pp. 1523-1532 ◽  
Author(s):  
Sujata D Wangkheirakpam ◽  
Wangkheirakpam Radhapiyari Devi ◽  
Chingakham Brajakishore Singh ◽  
Warjeet S Laitonjam
Keyword(s):  
Electron Microscopy ◽  
Silver Nanoparticles ◽  
Leaf Extract ◽  
X Ray Diffraction ◽  
Paramagnetic Resonance ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Electron Paramagnetic Resonance Technique ◽  
Average Size ◽  
Green Technique

The leaf extract of Strobilanthes flaccidifolius Nees. was used for the synthesis of silver nanoparticles through a green technique of synthesis. The nanoparticles was characterized by UV-VIS spectroscopy which proves the formation silver nanoparticles. FTIR (Fourier Transmission infra red spectroscopy) study was carried out to assess the biomolecule as indigo precursors, Energy dispersion X-ray analysis(EDX) data further proves it. EPR (Electron paramagnetic resonance technique) shows the free radical in silver neutral state and XRD(X-ray diffraction technique) also repots silver neutral formation.The morphology and the shape of the silver nanoparticles were determined by Scanning electron microscopy(SEM) and Tunneling electron microscopy (TEM).The nanoparticles adopted spherical morphology and the size ranging from 6nm to 54.11nm and average size was determined as 12.15± 5.3nm.The nanoparticles had antimicrobial activity

scholarly journals Green Synthesis of Ag Nanoparticles for Anti-Microbial Applications using Aloe Barbadensis Miller Extract

2021 ◽  
pp. 233-239
Author(s):  
Sankar S ◽  
Ganga Krishnan
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Ag Nanoparticles ◽  
Aloe Vera ◽  
Silver Ions ◽  
Xrd Analysis ◽  
Aloe Barbadensis ◽  
Agno3 Solution ◽  
Vis Spectroscopy ◽  
Ft Ir

The green synthesis of nanomaterials is becoming much popular as a result of worldwide problems associated with environmental concerns. In the present work, leaf extract of Barbadensis Miller, (commonly known as Aloe vera) was used for bio-reduction of silver ions to silver nanoparticles. Aloe vera extract and AgNO3 solution in different volumes were treated and it resulted in the reduction of Ag+ ions to Ag metal atoms, which further accumulated as Ag nanoparticles. The prepared nanoparticles were characterized by UV-vis spectroscopy, SEM, FT-IR spectroscopy and XRD analysis. The present study established that the shape and size of the silver nanoparticles can be effectively controlled and modulated using green synthesis technique. The scope of the prepared particles for anti-microbial applications were also investigated.

scholarly journals SINTESIS NANOPARTIKEL Ag/CoFe2O4 MENGGUNAKAN EKSTRAK DAUN BINAHONG (Anredera cordifolia (Ten) Steenis) DAN APLIKASINYA SEBAGAI FOTOKATALIS UNTUK MENDEGRADASI ZAT WARNA METHYLENE BLUE

2020 ◽  
Vol 12 (2) ◽  
Author(s):  
David Tjiang ◽  
Henry F. Aritonang ◽  
Harry S. J. Koleangan
Keyword(s):  
Methylene Blue ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Contact Time ◽  
Leaf Extract ◽  
Blue Dye ◽  
Cofe2o4 Nanoparticles ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Scanning Electron

ABSTRAKTelah dilakukan penelitian tentang kemampuan fotodegradasi zat warna sintetik Methylene Blue dengan menggunakan nanopartikel Ag/CoFe2O4 dengan variasi perbandingan mol AgNO3:(Co(NO3)2.6H2O): (Fe(NO3)3.9H2O)= 0,3:0,7:2 dan jumlah ekstrak daun binahong (Anredera cordifolia (Ten) Steenis) yang ditambahkan 10 mL. Material tersebut dikarakterisasi menggunakan X-Ray Diffractometry (XRD), Scanning Electron Microscope (SEM) dan spektroskopi UV-vis. Kemampuan fotodegradasi dilakukan melalui penentuan konsentrasi Methylene Blue (konsentrasi awal 5 ppm) yang tersisa setelah berinteraksi dengan nanopartikel Ag/CoFe2O4 yang disinari sinar UV-A selama 30, 60, 120 dan 150 menit. Penentuan konsentrasi dihitung berdasarkan absorbansi yang didapatkan dari hasil pembacaan uji Spektrofotometri UV-vis, lalu digunakan rumus menghitung persen degradasi. Hasil penelitian menunjukkan bahwa yang memiliki kemampuan fotodegradasi paling baik adalah nanopartikel Ag/CoFe2O4 (0,3 : 0,7 : 2) mol dengan waktu kontak 120 menit, yaitu dengan nilai persen degradasi sebesar 44,84 %. ABSTRACTA research on photodegradation ability Methylene Blue dye synthetic by using Ag/CoFe2O4 nanoparticles with a mole ratio variation AgNO3 : (Co(NO3)2.6H2O) : (Fe(NO3)3.9H2O)= 0,3:0,7:2 and the amount of binahong (Anredera cordifolia (Ten) Steenis) leaf extract added 10 mL. These materials were characterized using X-Ray Diffractometry (XRD), Scanning Electron Microscope (SEM) and UV-vis Spectroscopy. Ability photodegradation done by determining the concentration of Methylene Blue is residue after the interaction with Ag/CoFe2O4 nanoparticles with irradiated UV-A for 30, 60, 120 and 150 minutes. Determining the concentration is calculated based on the absorbance obtained from the results of the analysis of UV-vis Spectrophotometry and then used a formula calculating the percent degradation. The results showed that the ability is best photodegradation Ag/CoFe2O4 nanoparticles (0,3: 0,7: 2) moles with a contact time of 120 minutes with a degradation value of 44.84%.

scholarly journals Piper nigrumLeaf and Stem Assisted Green Synthesis of Silver Nanoparticles and Evaluation of Its Antibacterial Activity Against Agricultural Plant Pathogens

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Kanniah Paulkumar ◽  
Gnanadhas Gnanajobitha ◽  
Mahendran Vanaja ◽  
Shanmugam Rajeshkumar ◽  
Chelladurai Malarkodi ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Electron Microscope ◽  
Plant Pathogens ◽  
Xrd Analysis ◽  
Piper Nigrum ◽  
X Ray ◽  
Agricultural Plant ◽  
Synthesis Of Nanoparticles ◽  
Vis Spectroscopy

Utilization of biological materials in synthesis of nanoparticles is one of the hottest topics in modern nanoscience and nanotechnology. In the present investigation, the silver nanoparticles were synthesized by using the leaf and stem extract ofPiper nigrum. The synthesized nanoparticle was characterized by UV-vis spectroscopy, X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), energy dispersive X-ray analysis (EDAX), and Fourier Transform Infrared Spectroscopy (FTIR). The observation of the peak at 460 nm in the UV-vis spectra for leaf- and stem-synthesized silver nanoparticles reveals the reduction of silver metal ions into silver nanoparticles. Further, XRD analysis has been carried out to confirm the crystalline nature of the synthesized silver nanoparticles. The TEM images show that the leaf- and stem-synthesized silver nanoparticles were within the size of about 7–50 nm and 9–30 nm, respectively. The FTIR analysis was performed to identify the possible functional groups involved in the synthesis of silver nanoparticles. Further, the antibacterial activity of the green-synthesized silver nanoparticles was examined against agricultural plant pathogens. The antibacterial property of silver nanoparticles is a beneficial application in the field of agricultural nanotechnology.

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