Green Synthesis of Selenium Nanoparticle using Capparis decidua fruit extract and its Characterization using Transmission Electron Microscopy And UV- Visible Spectroscopy

2021 ◽  
pp. 2129-2132
Author(s):  
B. Madhumitha ◽  
Preetha Santhakumar ◽  
M. Jeevitha ◽  
S. Rajeshkumar
Keyword(s):  
Green Synthesis ◽  
Synthesis Method ◽  
Visible Spectroscopy ◽  
Traditional System ◽  
Selenium Nanoparticle ◽  
Transmission Electron ◽  
Medicinal Properties ◽  
Uv Visible ◽  
Capparis Decidua

Capparis decidua is used in the traditional system of medicine used due to its medicinal properties. Selenium nanoparticle was synthesized in a simple and rapid way by green synthesis method. Selenium nanoparticle was synthesized using aqueous extract of Capparis decidua fruit. The aim of this present study is to synthesize and to analyse the characterization of selenium nanoparticle synthesized using Capparis decidua. Characterization of selenium nanoparticle was done using ultra-visible spectroscopy and Transmission electron microscope [TEM]. Initially, the wavelength obtained for synthesized selenium nanoparticles ranged from 300nm to 600nm. Then TEM was carried out to find the size and shape of the nanoparticle. The selenium nanoparticle was spherical in shape with size of 320nm. The present study concluded that the selenium nanoparticle prepared using Capparis decidua was ecofriendly and may serve and benefit the society because of its rich medicinal property with less side effects if further research is carried out.

scholarly journals Green Synthesis of Silver Nanoparticles using Polyalthia longifolia Stem Bark Extract and its Catalytic Reduction of 4-Nitrophenol

2019 ◽  
Vol 31 (11) ◽  
pp. 2439-2442
Author(s):  
Karuppiah Muthu ◽  
B. Akilandaeaswari ◽  
S. Mangala Nagasundari
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Catalytic Reduction ◽  
Stem Bark ◽  
Bark Extract ◽  
Visible Spectroscopy ◽  
Transmission Electron ◽  
Stem Bark Extract ◽  
Uv Visible ◽  
Polyalthia Longifolia

In this present study, green synthesis of silver nanoparticles (AgNPs) was synthesized from silver nitrate using the reducing agents of Polyalthia longifolia bark extract and applied the catalyst in the reduction/degradation of environmental polluted organic compound in the presence of NaBH4. Initially, the colourless reaction mixture was slowly changed to yellowish brown, UV-visible spectroscopy of surface plasmon resonance centre at 447 nm confirmed the formation of AgNPs. High resolution transmission electron microscopy (HRTEM) clearly identified the spherical shapes nanoparticles with diameters sizes 5-25 nm. This AgNPs has excellent catalyst in the catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) as compared to the reducing agent of NaBH4 (chemical) and plant extract (natural).

scholarly journals Green Synthesis and Characterization of Silver NPs Using Oyster Mushroom Extract For Antibacterial Efficacy

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Ram Naraian ◽  
Abhishek Kumar Bhardwaj Abhishek
Keyword(s):  
Green Synthesis ◽  
Water Disinfection ◽  
Oyster Mushroom ◽  
Bactericidal Efficacy ◽  
Transmission Electron ◽  
Nano Material ◽  
Silver Nps ◽  
Uv Visible ◽  
Synthesis Approach

The present study was aimed to synthesize silver nanoparticles (AgNPs)using the extract of oyster mushroom Pleurotuscitrinopileatus and its use in antibacterial testing. This green synthesis approach of silver NPs is very fast, simple, environmentally friendly and economical. The initial confirmation of silver NPs synthesis was observed with the alteration of the colour of the solution from colourless to wine red. The prepared nano-material was further characterized by UV-Visible spectrophotometer, and transmission electron microscopy (TEM). The TEM revealed particle size of synthesized AgNPsbetween the range of 11-13 nm. The bactericidal efficacy of silver NPstested against Escherichia coli confirmed the lowest 50 µg/L concentration of silver NPs bactericidal. Therefore based the observations of the study silver NPsat the level of its 50 µg/L can be used for the purposes of potential water disinfection, killing of bacteria, disinfection of medical equipments, wound washings, preservation of food stuffs and in hand sanitization.

Controlling the Absorption of Gold Nanoparticles via Green Synthesis Using Sargassum crassifolium Extract

2018 ◽  
Vol 765 ◽  
pp. 44-48 ◽  
Author(s):  
Angeline F. Maceda ◽  
Johnny Jim S. Ouano ◽  
Mar Christian O. Que ◽  
Blessie A. Basilia ◽  
Melchor J. Potestas ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Gold Nanoparticles ◽  
Green Synthesis ◽  
Ftir Spectroscopy ◽  
Capping Agent ◽  
Visible Spectroscopy ◽  
Spectroscopy Analysis ◽  
Tem Analysis ◽  
Transmission Electron ◽  
Uv Visible

This work controls the absorption of gold nanoparticles (GNPs) via green synthesis utilizingSargassumcrassifoliumextract. The amount of seaweed extract acts as both reducing (from Au+to Au0) and capping agent. TheS.crassifoliumextract is mainly composed of biomolecules such as protein and phenolic compounds which are responsible for the synthesis of GNPs. The synthesized GNPs were characterized using UV-Visible spectroscopy, Fourier Transform Infrared (FTIR) spectroscopy and Transmission Electron Microscopy (TEM). UV-Vis spectra revealed peaks around 505 nm to 544 nm which corresponds to the Surface Plasmon Resonance (SPR) of GNPs. FTIR spectroscopy analysis showed peak at 825 cm-1and 1144 cm-1which corresponds to the signature peaks of GNPs. Polydisperse GNPs with varied sizes (between 5 nm to 300 nm) were further confirmed by TEM analysis.

scholarly journals Effect of Physical Parameters on Green Synthesis of Gold Nanoparticles using Zea Mays Extract

2019 ◽  
Vol 9 (2) ◽  
pp. 870-873
Keyword(s):  
Gold Nanoparticles ◽  
Zea Mays ◽  
Reaction Time ◽  
Green Synthesis ◽  
Synthesis Method ◽  
Physical Parameters ◽  
Concentration Effects ◽  
Stabilizing Solution ◽  
Transmission Electron ◽  
Uv Visible

Gold nanoparticles (AuNPs) were produced by green synthesis method by utilization of Zea Mays Extract as the reducing and stabilizing solution. Selected parameters like Time, Temperature, pH, Light and Concentration effects on the preparation of gold nanoparticles was analyzed by UV- Visible Spectroscopy (UV-Vis.). The size was measured through Dynamic Light Scattering (DLS) and also confirmed by Transmission electron microscopy (TEM) techniques, it is also observed that all the reaction time, Temperature, Concentration and reaction time are very essential parameters which should be noticed with high precession during the synthesis of Gold nanoparticles.

scholarly journals Synthesis and Characterization of Zinc Oxide Nanoparticles Using Acacia caesia Bark Extract and Its Photocatalytic and Antimicrobial Activities

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1507
Author(s):  
Jayachandran Ashwini ◽  
T. R. Aswathy ◽  
Anil Babu Rahul ◽  
Gautham M. Thara ◽  
Achuthsankar S. Nair
Keyword(s):  
Green Synthesis ◽  
Zno Nanoparticles ◽  
Methyl Blue ◽  
Synthesis And Characterization ◽  
Bark Extract ◽  
Average Crystalline Size ◽  
Visible Spectroscopy ◽  
Characteristic Peak ◽  
Uv Visible

This paper presents the green synthesis and characterization of ZnO nanoparticles and their microbial and photocatalytic application. The green synthesis of ZnO nanoparticles was carried out using Zinc nitrate hexahydrate and the bark extract of Acacia caesia (L.) Willd. The nanoparticles were synthesized at an optimum temperature of 65 °C followed by calcination at 400 °C. The samples were characterized using UV-visible spectroscopy, SEM, XRD, FTIR and EDX analysis. UV-visible spectroscopy showed a characteristic peak at 338 nm and the bandgap energy was found to be 3 eV which is specific for ZnO. SEM confirmed the presence of ZnO on its nanoscale. EDX gave the elemental details of Zinc constituting to 37.77% and Oxygen comprising 20.77% of its atomic weight. XRD analysis gave the diffractogram indexed at various angles corresponding to ZnO nanoparticles. It also revealed the average crystalline size to be 32.32 nm and the shape was found to be hexagonal. The functional group present in the nanoparticles was characterized using FTIR, which gave a characteristic peak at 485 cm−1. The synthesized nanoparticles exhibited significant photocatalytic (methyl blue under UV irradiation). The presence of nanoparticles induces changes in its kinetics, whose rate constants and correlation coefficients were analyzed during the photocatalytic degradation of the model pollutant Methyl Blue. Studies on antibacterial (Escherichia coli, Staphylococcus aureus), antifungal (Aspergillus niger, Candida albicans) and anti-inflammatory (COX assay) properties were also carried out. The nanoparticles were synthesized in an eco-friendly and cost-effective method. The study opens new horizons in the field of water treatment, biosensors and nanotechnology.

scholarly journals Green synthesis of silk sericin-embedded silver nanoparticles and their antibacterial application against multidrug-resistant pathogens

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Md. Abdullah Al Masud ◽  
Hamid Shaikh ◽  
Md. Shamsul Alam ◽  
M. Minnatul Karim ◽  
M. Abdul Momin ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Bombyx Mori ◽  
Multidrug Resistant ◽  
Visible Spectroscopy ◽  
Silk Sericin ◽  
X Ray ◽  
Synthesis Strategy ◽  
Uv Visible ◽  
Multidrug Resistant Pathogens

Abstract Background The green synthesis strategy of metallic nanoparticles (NPs) has become popular due to being environmentally friendly. Stable silver nanoparticles (AgNPs) have been synthesized by natural products such as starch, soy protein, various extract of leaves, barks, and roots functioning both as reducing and stabilizing agents. Likewise, silk sericin (SS) is a globular protein discarded in the silk factory might be used for NP synthesis. In this research, we focus on the green synthesis and stabilization of AgNPs by SS as well as assessment of their antibacterial activities against some drug-resistant pathogen. Results SS was extracted from Bombyx mori silkworm cocoons in an aqueous medium. 17 w/w% of dry sericin powder with respect to the cocoon’s weight was obtained by freeze-drying. Furthermore, AgNPs conjugated to sericin, i.e., SS-capped silver nanoparticles (SS-AgNPs) were synthesized by easy, cost-effective, and environment-friendly methods. The synthesized SS-AgNPs were characterized by UV-visible spectroscopy, Fourier-transform infrared-attenuated total reflection (FTIR-ATR) spectroscopy, transmission electron microscopy (TEM), and X-ray diffraction measurement. It has been found from the absorbance of UV-visible spectroscopy that a higher percent of SS-AgNPs was obtained at a higher concentration of silver nitrate solution. FTIR-ATR spectra showed that the carboxylate groups obtained from silk sericin act as a reducing agent for the synthesis of silver nanoparticles, while NH2+ and COO− act as a stabilizer of AgNPs. The X-ray diffractogram of SS-AgNPs was quite different from AgNO3 and sericin due to a change in the crystal structure. The diameter of AgNPs was around 20–70 nm observed using TEM. The synthesized SS-AgNPs exhibited strong antibacterial activity against multidrug-resistant pathogens, Escherichia coli and Pseudomonas aeruginosa. Minimal inhibitory/bactericidal concentrations against E. coli and P. aeruginosa were 20μg/mL. Conclusions This study encourages the use of Bombyx mori for the ecofriendly synthesis of SS-AgNPs to control multidrug-resistant microorganisms.

scholarly journals Synthesis and Characterization of a Bioconjugate Based on Oleic Acid and L-Cysteine

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1791
Author(s):  
Marco Vizcarra-Pacheco ◽  
María Ley-Flores ◽  
Ana Mizrahim Matrecitos-Burruel ◽  
Ricardo López-Esparza ◽  
Daniel Fernández-Quiroz ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Materials Science ◽  
Critical Micellar Concentration ◽  
Synthesis And Characterization ◽  
New Materials ◽  
Visible Spectroscopy ◽  
Amide Bonds ◽  
Transmission Electron ◽  
Self Assembled

One of the main challenges facing materials science today is the synthesis of new biodegradable and biocompatible materials capable of improving existing ones. This work focused on the synthesis of new biomaterials from the bioconjugation of oleic acid with L-cysteine using carbodiimide. The resulting reaction leads to amide bonds between the carboxylic acid of oleic acid and the primary amine of L-cysteine. The formation of the bioconjugate was corroborated by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and nuclear magnetic resonance (NMR). In these techniques, the development of new materials with marked differences with the precursors was confirmed. Furthermore, NMR has elucidated a surfactant structure, with a hydrophilic part and a hydrophobic section. Ultraviolet-visible spectroscopy (UV-Vis) was used to determine the critical micellar concentration (CMC) of the bioconjugate. Subsequently, light diffraction (DLS) was used to analyze the size of the resulting self-assembled structures. Finally, transmission electron microscopy (TEM) was obtained, where the shape and size of the self-assembled structures were appreciated.

scholarly journals Green synthesis and characterization of hexaferrite strontium-perovskite strontium photocatalyst nanocomposites

2020 ◽  
Vol 43 (1) ◽  
pp. 26-42 ◽  
Author(s):  
Zahra Hajian Karahroudi ◽  
Kambiz Hedayati ◽  
Mojtaba Goodarzi
Keyword(s):  
Magnetic Properties ◽  
Green Synthesis ◽  
Sol Gel ◽  
Synthesis Method ◽  
Combustion Method ◽  
Lemon Juice ◽  
X Ray Diffraction ◽  
X Ray ◽  
Auto Combustion

AbstractThis study presents a preparation of SrFe12O19– SrTiO3 nanocomposite synthesis via the green auto-combustion method. At first, SrFe12O19 nanoparticles were synthesized as a core and then, SrTiO3 nanoparticles were prepared as a shell for it to manufacture SrFe12O19–SrTiO3 nanocomposite. A novel sol-gel auto-combustion green synthesis method has been used with lemon juice as a capping agent. The prepared SrFe12O19–SrTiO3 nanocomposites were characterized by using several techniques to characterize their structural, morphological and magnetic properties. The crystal structures of the nanocomposite were investigated via X-ray diffraction (XRD). The morphology of SrFe12O19– SrTiO3 nanocomposite was studied by using a scanning electron microscope (SEM). The elemental composition of the materials was analyzed by an energy-dispersive X-ray (EDX). Magnetic properties and hysteresis loop of nanopowder were characterized via vibrating sample magnetometer (VSM) in the room temperature. Fourier transform infrared spectroscopy (FTIR) spectra of the samples showed the molecular bands of nanoparticles. Also, the photocatalytic behavior of nanocomposites has been checked by the degradation of azo dyes under irradiation of ultraviolet light.

scholarly journals Optical and Photoacoustic Properties of Laser-Ablated Silver Nanoparticles in a Carbon Dots Solution

Molecules ◽  
2020 ◽  
Vol 25 (24) ◽  
pp. 5798
Author(s):  
Amir Reza Sadrolhosseini ◽  
Ganesan Krishnan ◽  
Suhaidi Shafie ◽  
Suraya Abdul Rashid ◽  
Sulaiman Wadi Harun
Keyword(s):  
Silver Nanoparticles ◽  
Carbon Dots ◽  
Thermal Effusivity ◽  
Nonlinear Susceptibility ◽  
Time Range ◽  
Raman Signal ◽  
Optical Parameters ◽  
Visible Spectroscopy ◽  
Transmission Electron ◽  
Uv Visible

This study used the carbon dots solution for the laser ablation technique to fabricate silver nanoparticles. The ablation time range was from 5 min to 20 min. Analytical methods, including Fourier transform infrared spectroscopy (FTIR), UV-visible spectroscopy, transmission electron microscopy, and Raman spectroscopy were used to categorize the prepared samples. The UV-visible and z-scan techniques provided optical parameters such as linear and nonlinear refractive indices in the range of 1.56759 to 1.81288 and 7.3769 × 10−10 cm2 W−1 to 9.5269 × 10−10 cm2 W−1 and the nonlinear susceptibility was measured in the range of 5.46 × 10−8 to 6.97 × 10−8 esu. The thermal effusivity of prepared samples, which were measured using the photoacoustic technique, were in the range of 0.0941 W s1/2 cm−2 K−1 to 0.8491 W s1/2 cm−2 K−1. The interaction of the prepared sample with fluoride was investigated using a Raman spectrometer. Consequently, the intensity of the Raman signal decreased with the increasing concentration of fluoride, and the detection limit is about 0.1 ppm.

Optimization of Green Synthesis Approach of Silver Nanoparticles Using Indonesian Wild Honey

2021 ◽  
Vol 891 ◽  
pp. 111-115
Author(s):  
Maradhana Agung Marsudi ◽  
Farah Fitria Sari ◽  
Pandu Mauliddin Wicaksono ◽  
Adinda Asmoro ◽  
Arif Basuki ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Synthesis Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Particle Count ◽  
Transmission Electron ◽  
Nitrate Precursor ◽  
Synthesis Approach

In this work, silver nanoparticles have been successfully synthesized using simple and environmentally friendly ‘green synthesis’ method using Indonesian wild honey as mediator. Particle count and size can be optimized by varying the silver nitrate precursor and honey concentration, with the help of sodium hydroxide as pH regulator. Based on X-ray diffraction (XRD) result, crystalline structure of Ag has been confirmed in sample with impurities from AgCl. Based on dynamic light scattering (DLS) and transmission electron microscopy (TEM) results, it was found that the smallest average particles size of AgNPs (117.5 nm from DLS and 11.1 nm from TEM) was obtained at sample with 5% w/v of honey and 0.5 mM of AgNO3.

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