scholarly journals Moringa oleifera Leaf Extract-Mediated Green Synthesis of Nanostructured Alkaline Earth Oxide (MgO) and Its Physicochemical Properties

2021 ◽  
Vol 2021 ◽  
pp. 1-22
Author(s):  
Archana Venkatachalam ◽  
Joseph Prince Jesuraj ◽  
kalainathan Sivaperuman
Keyword(s):  
Magnesium Oxide ◽  
Leaf Extract ◽  
Moringa Oleifera ◽  
Oxide Nanoparticles ◽  
Stoichiometric Ratio ◽  
Face Centered Cubic ◽  
Promising Candidate ◽  
Mgo Nanoparticles ◽  
X Ray ◽  
Magnesium Oxide Nanoparticles

The magnesium oxide nanoparticles (MgO NPs) were prepared from Moringa oleifera leaf extract. Phytochemicals are derived from plant extract which are served as stabilizing and capping agents. This green route has been attracted owing to speed, reliable, and eco-friendly and cost-effective one. The synthesized magnesium oxide nanoparticles were taken into three different calcination temperatures (500, 600, and 700°C). The powder X-ray diffraction (PXRD) study shows a pure phase of face-centered cubic structure. Periclase MgO nanoparticles were prepared. The optical band gap of MgO nanoparticles is 4.5 eV, and its absorption in the UV region was observed by UV-visible spectroscopy (UV-Vis). Photoluminescence spectra have exhibited multicolor emissions were being at UV and visible region due to defect centers (F centers) of MgO nanoparticles. EDX (energy dispersive X-ray spectrum) has given the stoichiometric ratio of Mg and O. The functional groups have been studied by Fourier transformed infrared spectroscopy (FTIR), surface morphology transformation has been identified by scanning electron microscopy (SEM) studies, and VSM measurements have given the information of diamagnetic nature of MgO nanoparticles. H-R TEM micrographs have confirmed that particles were in nanorange matched with XRD report. Polycrystalline nature has been observed pattern information. TG-DSC characterization revealed phase transition and weight loss information. D-band and G-band of MgO nanoparticles are studied by micro-Raman analysis. Dielectric analysis has proven that MgO nanoparticles will be a promising candidate for linear dielectric ceramics, thermistor. The present resent studies have revealed that MgO powder will be an economical and promising candidate in superconductor, optoelectronic device, and energy storage applications.

scholarly journals Structural and electrical studies on zinc added magnesium oxide nanoparticles

2020 ◽  
Vol 31 (3) ◽  
pp. 73-86
Author(s):  
Sumithraj Premkumar P. ◽  
Keyword(s):  
Magnesium Oxide ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
Mgo Nanoparticles ◽  
X Ray ◽  
Electrical Studies ◽  
Magnesium Oxide Nanoparticles ◽  
Different Temperatures ◽  
Crystalline Nature ◽  
Scanning Electron

Magnesium oxide (MgO, pure) and zinc added MgO nanoparticles were synthesised by a simple microwave assisted solvothermal method. The concentrations of impurity used in the present work were 0.25 M and 0.50 M. All samples were annealed at 400°C for 1 h to improve the ordering. The prepared pure and zinc added magnesium oxide nanoparticles were characterised by powder X-ray diffraction (PXRD), energy dispersive spectroscopy (EDS) and scanning electron microscopy (SEM). PXRD studies of pure and zinc added MgO nanoparticles showed that all samples belong to crystalline nature with cubic structure. The grain size of all samples were determined from the XRD results and it belongs to nano meter scale. The EDS confirmed the presence of zinc, magnesium and oxide elements in the respective prepared samples. The scanning electron microscope images confirmed that the prepared samples possess nanometer dimensions. The electrical properties such as AC conductivity, dielectric constant and dielectric loss were measured at different temperatures in the different frequency range by involving the impedance analyser of all the prepared samples.

scholarly journals Biogenic synthesis of magnesium oxide nanoparticles using Manihot esculenta (Crantz) leaf extract

2019 ◽  
Vol 10 (1) ◽  
pp. 43-48 ◽  
Author(s):  
Enobong R. Essien ◽  
Violette N. Atasie ◽  
Anastecia O. Okeafor ◽  
Davies O. Nwude
Keyword(s):  
Electron Microscopy ◽  
Magnesium Oxide ◽  
Manihot Esculenta ◽  
Large Scale ◽  
Leaf Extract ◽  
Metal Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Manihot Esculenta Crantz ◽  
X Ray ◽  
Magnesium Oxide Nanoparticles

AbstractRecently, plant-mediated route or green approach for preparing metal and metal oxide nanoparticles has received enormous attention due to the ease of preparation and environmental friendliness when compared to physical and chemical methods. Plants contain phytochemicals which have been proposed as bio-reductants and capping agents for forming metal nanoparticles. Therefore, this study was aimed to prepare magnesium oxide nanoparticles (MgONPs) using aqueous extract of Manihot esculenta leaf. The leaf extract was first analyzed in a gas chromatograph–mass spectrometer (GC–MS) to examine the phytochemicals present. Then, the MgONPs formed were evaluated using UV–Visible (UV–Vis) spectrophotometry, scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), X-ray diffractometry (XRD) and Fourier transform infrared (FTIR) spectroscopy, to confirm the formation of MgONPs and to determine the morphology, elemental composition, shape and size, phase composition and nature of bonds present in the sample. Results revealed the formation of monodisperse, hexagonal shaped MgONPs of average size 36.7 nm having potentials for application in catalysis and as antimicrobial agent. Hence the process reported herein could be optimized for large-scale preparation of MgONPs.

Appraisal of innovative phytosynthetic CdO NPs from leaf extract of Ocimum Sanctum and their bactericidal activity against different strains

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Aarth R ◽  
Sudha A P ◽  
Sujatha B ◽  
Sowmya Lakshmi K
Keyword(s):  
Leaf Extract ◽  
Cadmium Oxide ◽  
Morphological Properties ◽  
Precipitation Method ◽  
Ocimum Sanctum ◽  
Oxide Nanoparticles ◽  
Average Crystalline Size ◽  
Face Centered Cubic ◽  
Bacterial Strains ◽  
X Ray

The phytosynthesis of n-type Cadmium Oxide Nanoparticles reduces the toxicity of the substance and makes it Eco-friendly. This Eco-friendly biosynthesis of CdO NPs was synthesized for the first time from the Queen of herbs, Ocimum Sanctum (holy basil).The biosynthesized Cadmium oxide was prepared using Ocimum leaf extract as a reductant and Cadmium Chloride and hydroxide as cadmium and oxide source materials by Co- Precipitation method. Thus obtained Cadmium Oxide Nanoparticles were characterized by different techniques such as X-ray diffraction (XRD), Fourier Transform infrared spectroscopy (FTIR), Scanning electron microscope (SEM),Energy dispersive X-ray spectroscopy(EDS) to study the structural and morphological properties. XRD pattern exhibited the formation of face centered cubic structure of CdO NPs with an average crystalline size of 11.5nm .The chemical bond formation of CdO NPs were confirmed by FTIR spectrum in the range of (400-4000cm-1). The SEM micrographs revealed the predominant formation of Cauliflower shape with a particle size in the range of 61-142nm. The high purity of the biosynthesized nanoparticles were confirmed by EDS analysis. Further it was tested against gram positive and gram negative bacterial strains and showed significant antibacterial activity. This biosynthetic research study opens an innovative window to progress our understanding of how CdO NPs shows resistance to different bacterial strains.

Applications of ZnO and MgO Nanoparticles in Reducing Zinc Pollution Level in Rubber Manufacturing Processes: A Review

2020 ◽  
Vol 6 (2) ◽  
pp. 103-107 ◽  
Author(s):  
Seyyed Mohammad Javadi
Keyword(s):  
Zinc Oxide ◽  
Fatty Acid ◽  
Magnesium Oxide ◽  
Environmental Effects ◽  
Pollution Level ◽  
Oxide Nanoparticles ◽  
Mgo Nanoparticles ◽  
Magnesium Oxide Nanoparticles ◽  
Council Directive ◽  
Zno Particles

Background: Rubber vulcanization is a consolidated chemical process to enhance the mechanical properties of the polymeric material by sulfur crosslinking of the polymer chains, such as rubber. Vulcanization Activators are important rubber processing additives that activate sulfur cure and improve the efficiency of sulfur-based cure systems. The most common activator is zinc fatty acid ester that is often formed in-situ by the reaction of fatty acid with zinc oxide. Although zinc is one of the less harmful heavy metals, according to European Council Directive 2004/73/EC, the reduction of zinc level in the environment has become an important task because of its toxic effect on aquatic organisms. : The current study reviews the research achievements in the field of reducing the consumption of micronutrients of ZnO particles based on the use of nanoparticles instead of them in the polymer industry. Among the proposed methods, due to the less environmental effects of magnesium oxide, the use of MgO nanoparticles instead of zinc oxide has also achieved good results. Objective: The aim of this paper is considering suggested different methods on the reduction of using ZnO particles in related industries, the use of ZnO nanoparticles has had better results than its particles. In addition, due to the less environmental effects of magnesium oxide, magnesium oxide nanoparticles can be used instead of micronutrients of zinc oxide. Overall, the results of various investigations show that reducing the diameter of the zinc oxide particles reduces the amount required for curing the rubber and thus reduces its toxic effects. Also, the use of magnesium oxide nanoparticles instead of zinc oxide in different concentrations is investigated.

Biomimetic synthesis of magnesium oxide nanoparticles using Chromolaena odorata (L.) leaf extract

2020 ◽  
Vol 74 (7) ◽  
pp. 2101-2109 ◽  
Author(s):  
Enobong R. Essien ◽  
Violette N. Atasie ◽  
Taiye O. Oyebanji ◽  
Davies O. Nwude
Keyword(s):  
Magnesium Oxide ◽  
Leaf Extract ◽  
Biomimetic Synthesis ◽  
Oxide Nanoparticles ◽  
Chromolaena Odorata ◽  
Magnesium Oxide Nanoparticles

Fabrication of magnesium oxide nanoparticles by solvent alteration and their bactericidal applications

2019 ◽  
Vol 7 (26) ◽  
pp. 4141-4152 ◽  
Author(s):  
Proma Bhattacharya ◽  
Sarpras Swain ◽  
Lopamudra Giri ◽  
Sudarsan Neogi
Keyword(s):  
Reactive Oxygen Species ◽  
Magnesium Oxide ◽  
Reactive Oxygen Species Generation ◽  
Reactive Oxygen ◽  
Oxide Nanoparticles ◽  
Oxygen Species ◽  
Mgo Nanoparticles ◽  
Antibacterial Ability ◽  
Ctab Solution ◽  
Magnesium Oxide Nanoparticles

MgO nanoparticles are synthesized using water, ethanol and aqueous CTAB solution. The nanoparticles synthesized in ethanol exhibited smallest size, maximum reactive oxygen species generation and maximum antibacterial ability, and low haemolysis.

Synthesis and characterization of magnesium Oxide nanoparticles by sol-gel method

2020 ◽  
Vol 3 (3) ◽  
Author(s):  
Jegadeeswari A ◽  
Nivetha S
Keyword(s):  
Magnesium Oxide ◽  
Sol Gel ◽  
Morphological Characterization ◽  
Magnesium Nitrate ◽  
Oxide Nanoparticles ◽  
Mgo Nanoparticles ◽  
Gel Method ◽  
Sol Gel Method ◽  
Magnesium Oxide Nanoparticles

Magnesium oxide was hygroscopic solid mineral that occurs naturally as periclase.Magnesium oxide had high thermal conductivity; it gets heated when the electricity was passed through it. Magnesia crucible had a stability of 2400°C in air, 1700°C in reducing atmosphere. Magnesium oxide nanoparticles were obtained from the mixture of magnesium nitrate as precursor and sodium hydroxide as precipitating agent by sol-gel method. Finally,the resultant white crystalline powder of MgO was annealed at various temperatures of 80°C, 135°C and 180°C. The analytical studies (XRD, SEM FTIR, EDAX) reveals the morphological characterization of MgO nanoparticles. The Scanning Electron Microscopy (SEM) indicates the structures of MgO nanoparticles. The crystal size of MgO nanoparticles was obtained by X-Ray Diffraction (XRD). The optical properties of the sample were obtained by UV- Visible spectroscopy. Fourier Transform infrared spectroscopy indicates powdered composition of the sample. EDAX indicates elementary composition of the MgO nanoparticles.

Synthesis of Magnesium Oxide Nanoparticles by Wet Chemical Method and its Antibacterial Activity

2013 ◽  
Vol 678 ◽  
pp. 297-300 ◽  
Author(s):  
Joghee Suresh ◽  
Raja Gopal Rajiv Gandhi ◽  
Samayanan Selvam ◽  
Mahalingam Sundrarajan
Keyword(s):  
Magnesium Oxide ◽  
Large Scale ◽  
Chemical Method ◽  
Diffusion Method ◽  
Oxide Nanoparticles ◽  
Wet Chemical Method ◽  
Sem Images ◽  
Mgo Nanoparticles ◽  
Magnesium Oxide Nanoparticles ◽  
Wet Chemical

Wet chemical method was applied to prepare magnesium oxide nanoparticles using magnesium nitrate and sodium hydroxide as precursors in presence of starch as stabilizing agent. The XRD analysis of MgO nanoparticles showed the average particles size of crystallite as 12nm. SEM images also proved the crystalline nature of MgO nanoparticles. Antibacterial studies were done on gram positive (S. aureus) and gram negative (E.coli) bacteria using the above prepared nanoparticles by agar diffusion method. The zone of inhibition was found to more in S.aureus compared to E.coli. Since this method of preparation produced better yield in simple and cost effective way, it can be applied for large scale preparation of magnesium oxide nanoparticles.

scholarly journals The Catalytic Activity of Biosynthesized Magnesium Oxide Nanoparticles (MgO-NPs) for Inhibiting the Growth of Pathogenic Microbes, Tanning Effluent Treatment, and Chromium Ion Removal

Catalysts ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 821
Author(s):  
Ebrahim Saied ◽  
Ahmed M. Eid ◽  
Saad El-Din Hassan ◽  
Salem S. Salem ◽  
Ahmed A. Radwan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Magnesium Oxide ◽  
Oxygen Demand ◽  
Effluent Treatment ◽  
Oxide Nanoparticles ◽  
X Ray ◽  
Chromium Ion ◽  
Ion Removal ◽  
Magnesium Oxide Nanoparticles ◽  
Vis Spectroscopy

Magnesium oxide nanoparticles (MgO-NPs) were synthesized using the fungal strain Aspergillus terreus S1 to overcome the disadvantages of chemical and physical methods. The factors affecting the biosynthesis process were optimized as follows: concentration of Mg(NO3)2·6H2O precursor (3 mM), contact time (36 min), pH (8), and incubation temperature (35 °C). The characterization of biosynthesized MgO-NPs was accomplished using UV-vis spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy—energy dispersive X-ray (SEM-EDX), X-ray diffraction (XRD), and dynamic light scattering (DLS). Data confirmed the successful formation of crystallographic, spherical, well-dispersed MgO-NPs with a size range of 8.0–38.0 nm at a maximum surface plasmon resonance of 280 nm. The biological activities of biosynthesized MgO-NPs including antimicrobial activity, biotreatment of tanning effluent, and chromium ion removal were investigated. The highest growth inhibition of pathogenic Staphylococcus aureus, Bacillus subtilis, Pseudomonas aeruginosa, Escherichia coli, and Candida albicans was achieved at 200 μg mL–1 of MgO-NPs. The biosynthesized MgO-NPs exhibited high efficacy to decolorize the tanning effluent (96.8 ± 1.7% after 150 min at 1.0 µg mL–1) and greatly decrease chemical parameters including total suspended solids (TSS), total dissolved solids (TDS), biological oxygen demand (BOD), chemical oxygen demand (COD), and conductivity with percentages of 98.04, 98.3, 89.1, 97.2, and 97.7%, respectively. Further, the biosynthesized MgO-NPs showed a strong potential to remove chromium ions from the tanning effluent, from 835.3 mg L–1 to 21.0 mg L–1, with a removal percentage of 97.5%.

scholarly journals The effect of particle size on the optical and electronic properties of magnesium oxide nanoparticles

2021 ◽  
Vol 23 (38) ◽  
pp. 21579-21590
Author(s):  
Martijn A. Zwijnenburg
Keyword(s):  
Particle Size ◽  
Electronic Properties ◽  
Magnesium Oxide ◽  
Oxide Nanoparticles ◽  
Mgo Nanoparticles ◽  
Magnesium Oxide Nanoparticles ◽  
Optical And Electronic Properties ◽  
Effect Of Particle Size

We use evGW/BSE calculations to demonstrate that the optical and electronic properties of MgO nanoparticles are governed by the low-coordinated atoms on their surfaces.

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