scholarly journals Influence of the Alcoholic/Ethanolic Extract of Mangifera indica Residues on the Green Synthesis of FeO Nanoparticles and Their Application for the Remediation of Agricultural Soils

Molecules ◽  
2021 ◽  
Vol 26 (24) ◽  
pp. 7633
Author(s):  
Jhordi Bautista-Guzman ◽  
Rosa Gomez-Morales ◽  
David Asmat-Campos ◽  
Noemi Raquel Checca
Keyword(s):  
Green Synthesis ◽  
Agricultural Soils ◽  
Mangifera Indica ◽  
Physical Property Measurement System ◽  
Physical Property ◽  
Ethanolic Extract ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Potential Alternative

The green synthesis of iron oxide nanoparticles (FeO NP) has been investigated using the extract in absolute ethanolic and alcoholic solvents 96% from the peel of the mango fruit (Mangifera indica), thus evaluating the influence of the type of solvent on the extraction of reducing metabolites. A broad approach to characterization initially controlled by UV-vis spectrophotometry has been directed, the formation mechanism was evaluated by Fourier transform infrared spectroscopy (FTIR), the magnetic properties by characterization by Physical Property Measurement System (PPSM), in addition to a large number of techniques such as X-ray energy dispersive spectroscopy (EDS), X-ray diffraction (DRX), transmission electron microscopy (TEM/STEM), electron energy loss spectroscopy (EELS), and Z potential to confirm the formation of FeO NP. The results suggest better characteristics for FeO NP synthesized using 96% alcoholic solvent extract. The successful synthesis was directly proven in the removal of metals (Cr-VI, Cd, and Pb) as a potential alternative in the remediation of agricultural soils.

scholarly journals Synthesis and Properties of Nanosized Stoichiometric Cobalt Ferrite Spinel

Materials ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1241 ◽  
Author(s):  
Vilém Bartůněk ◽  
David Sedmidubský ◽  
Štěpán Huber ◽  
Marie Švecová ◽  
Pavel Ulbrich ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Physical Property Measurement System ◽  
Physical Property ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Property Measurement ◽  
Scherrer Formula ◽  
Ferrite Spinel

Nanoparticles with controllable sizes of ferrite spinel CoFe2O4 were formed by thermal treatment of cobalt-iron glycerolate. Thermal behavior during the heating was studied by differential thermal analysis combined with thermogravimetry. The precursor, as well as the prepared nanoparticles, were analyzed by a broad spectrum of analytic techniques (X-Ray photoelectron spectroscopy (XPS), X-Ray diffraction (XRD), Energy dispersive spectroscopy (EDS), Atomic absorption spectroscopy (AAS), Scanning electron microscopy (SEM), and Raman spectroscopy). The particle size of nanoparticles was obtained from Transmission electron microscopy and also calculated using Scherrer formula. A vibrating sample magnetometer (VSM) in a Physical Property Measurement System was used to analyze the magnetic properties of nanoparticles.

Synthesis of Monodispersed Fe3O4 Magnetite Nanoparticles by Ethylene Glycol Solvothermal Method

2013 ◽  
Vol 634-638 ◽  
pp. 2276-2279 ◽  
Author(s):  
Gang Xu ◽  
Min Zhang ◽  
Ping Ou ◽  
Yi Zhang ◽  
Gao Rong Han
Keyword(s):  
Ethylene Glycol ◽  
Magnetite Nanoparticles ◽  
Solvothermal Method ◽  
Physical Property Measurement System ◽  
Physical Property ◽  
X Ray Diffraction ◽  
Ferromagnetic Property ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Property Measurement

Monodispersed Fe3O4 magnetite nanoparticles were successfully synthesized via a simple solvothermal method, in which Fe(NO3)3•9H2O was used as the starting materials, KOH as the mineralizer, and ethylene glycol (en) as the solvent. X-ray diffraction (XRD) and selected area electron diffraction (SAED) were employed to characterize the phase composition, transmission electron microscope (TEM) to observe the morphology and the particle size, and physical property measurement system (PPMS) to investigate the magnetic property of the synthesized powders, respectively. The synthesized Fe3O4 magnetite nanoparticles are of 50-100nm in size, and of notable ferromagnetic property. The saturation magnetization, remanent magnetization, and coercive field are 68.8emu•g-1, 12.9emu•g-1, 138.5Oe, respectively. Based on the experimental resuts, the formation mechanism and the well monodispersed reason of the solvothersized Fe3O4 nanoparticles are discussed.

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.

Single crystal growth and magnetic properties of Co-doped ZnNb2O6

2019 ◽  
Vol 33 (23) ◽  
pp. 1950274
Author(s):  
Ying Liu ◽  
Dapeng Xu ◽  
Huamin Yu ◽  
Tian Cui ◽  
Liang Li
Keyword(s):  
Magnetic Properties ◽  
Single Crystals ◽  
Photoelectron Spectroscopy ◽  
Physical Property Measurement System ◽  
Physical Property ◽  
X Ray Diffraction ◽  
Zone Method ◽  
X Ray ◽  
Structure Formula ◽  
Property Measurement

The columbite structure [Formula: see text] single crystals have been successfully grown by using the optical floating zone method. The as-grown crystals are characterized by X-ray diffraction (XRD), Raman spectroscopy (RS) and X-ray photoelectron spectroscopy (XPS). All these analyses show that the doping Co ions do not disturb the structure of columbite [Formula: see text] and some [Formula: see text] ions are substituted by transition metal [Formula: see text] ions without any other impurities. The magnetic properties of as-grown [Formula: see text] crystals have been investigated using Physical Property Measurement System (PPMS). The effective magnetic moment of [Formula: see text] crystals is [Formula: see text], indicating that [Formula: see text] ions present in [Formula: see text] single crystals are in mixed HS and LS states. The ferromagnetic, antiferromagnetic and paramagnetic characters of as-grown crystals are also discussed.

scholarly journals Green synthesis and characterization of cuprous oxide nanoparticles in presence of a bio-surfactant

2014 ◽  
Vol 32 (4) ◽  
pp. 702-708 ◽  
Author(s):  
M. Behera ◽  
G. Giri
Keyword(s):  
Green Synthesis ◽  
Photoelectron Spectroscopy ◽  
Broad Band ◽  
X Ray Diffraction ◽  
Oh Groups ◽  
X Ray ◽  
Transmission Electron ◽  
Fcc Lattice ◽  
Perennial Shrub ◽  
A Charge

AbstractHerein, we report a facile green synthesis of Cu2O nanoparticles (NPs) using copper sulfate as precursor salt and hydrazine hydrate as reducing agent in presence of bio-surfactant (i.e. leaves extract of arka — a perennial shrub) at 60 to 70 °C in an aqueous medium. A broad band centered at 460 nm in absorption spectrum reveals the formation of surfactant stabilized Cu2O NPs. X-ray diffraction pattern of the surfactant stabilized NPs suggests the formation of only Cu2O phase in assistance of a bio-surfactant with the crystallite size of ∼8 nm. A negative zeta potential of −12 mV at 8.0 pH in surfactant stabilized Cu2O NPs hints non-bonding electron transfer from O-atom of saponin to the surface of NP. Red-shift in the vibrational band (Cu-O stretching) of Cu2O from 637 cm−1 to 640 cm−1 in presence of bio-surfactant suggests an interfacial interaction between NPs and O-atoms of -OH groups of saponin present in the plant (i.e. Calotropis gigantean) extract. From X-ray photoelectron spectroscopy spectra, a decrease in binding energy of both 2p3/2 and 2p1/2 bands in Cu2O with saponin molecules as compared to bulk Cu atom reveals a charge transfer interaction between NP and saponin surfactant molecules. Transmission electron microscopy images show crystalline nature of Cu2O NPs with an fcc lattice.

Sol–gel synthesis, structural and electrical properties of Li2CoSiO4 cathode material

2014 ◽  
Vol 07 (06) ◽  
pp. 1440001 ◽  
Author(s):  
Michał Świętosławski ◽  
Marcin Molenda ◽  
Piotr Natkański ◽  
Piotr Kuśtrowski ◽  
Roman Dziembaj ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Sol Gel ◽  
Lithium Ion ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Structural And Electrical Properties ◽  
Potential Alternative ◽  
Sol Gel Synthesis ◽  
First Time

Polyanionic cathode materials for lithium-ion batteries start to be considered as potential alternative for layered oxide materials. Among them, Li 2 CoSiO 4, characterized by outstanding capacity and working voltage, seems to be an interesting substitute for LiFePO 4 and related systems. In this work, structural and electrical investigations of Li 2 CoSiO 4 obtained by sol–gel synthesis were presented. Thermal decomposition of gel precursor was studied using EGA (FTIR)-TGA method. Chemical composition of the obtained material was confirmed using X-ray diffraction and energy-dispersive X-ray spectroscopy. The morphology of β- Li 2 CoSiO 4 was studied using transmission electron microscopy. High temperature electrical conductivity of Li 2 CoSiO 4 was measured for the first time. Activation energies of the electrical conductivity of two Li 2 CoSiO 4 polymorphs (β and γ) were determined. The room temperature electrical conductivity of those materials was estimated as well.

Law of Approach to Magnetic Saturation in Nanocrystalline Pr2Co7Cx(x≤1): Effects of Carbonation

SPIN ◽  
2020 ◽  
Vol 10 (03) ◽  
pp. 2050016
Author(s):  
Z. Yamkane ◽  
R. Fersi ◽  
F. Z. Rachid ◽  
R. Moubah ◽  
H. Lassri ◽  
...  
Keyword(s):  
Physical Property Measurement System ◽  
Mean Field Theory ◽  
Mean Field ◽  
Physical Property ◽  
Exchange Interactions ◽  
X Ray Diffraction ◽  
Fundamental Parameters ◽  
Transmission Electron ◽  
Random Magnetic Anisotropy ◽  
Anisotropy Model

We report on the effect of Carbon insertion on the microstructure and magnetic properties of nanocrystalline Pr2Co7Cx([Formula: see text]). The Pr2Co7Cx were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and physical property measurement system (PPMS9) Quantum Design. Mean field theory was utilized to depict the temperature dependence of magnetization and deduce the exchange interactions. The approach to saturation magnetization was as well used. The results were interpreted in the framework of random magnetic anisotropy model. From such analysis, some fundamental parameters were extracted.

scholarly journals Cottonseed Oilcake Extract Mediated Green Synthesis of Silver Nanoparticles and Its Antibacterial and Cytotoxic Activity

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Muthusamy Govarthanan ◽  
Min Cho ◽  
Jung-Hee Park ◽  
Jum-Suk Jang ◽  
Young-Joo Yi ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Silver Nanoparticles ◽  
Fourier Transform ◽  
Green Synthesis ◽  
Pseudomonas Syringae ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Xrd Techniques

Agroindustrial byproduct mediated green synthesis of silver nanoparticles was carried out using cottonseed oilcake (CSOC) extract. The aqueous silver nitrate formed stable silver nanoparticles with CSOC extract as a reducing agent for Ag+to Ag0. The synthesized nanoparticles were characterized using energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD) techniques. The synthesized silver nanoparticles (AgNPs) (4 mM) significantly inhibited the growth of phytopathogens,Pseudomonas syringaepv.actinidiaeandRalstonia solanacearum. Further, cytotoxicity of AgNPs was evaluated using rat splenocyte cells. The splenocyte viability was decreased according to the increasing concentration of AgNPs and 90% of cell death was observed at 100 μg/mL.

scholarly journals Anticancer Activity of Silver Nanoparticle by Using Cassia auriculata Extract

2020 ◽  
pp. 1-9
Author(s):  
M. Prem Nawaz ◽  
A. Afroos Banu ◽  
S. Raja Mohamed ◽  
M. Palanivelu ◽  
A. Ayeshamariam
Keyword(s):  
Green Synthesis ◽  
Synthesis Method ◽  
Precursor Solution ◽  
Cotton Fabrics ◽  
X Ray Diffraction ◽  
Ag Nps ◽  
X Ray ◽  
Cassia Auriculata ◽  
Transmission Electron ◽  
Mcf 7

In this study, green synthesis of silver nanoparticles (Ag NPs) has done using traditional herbal namely Cassia auriculata extract by the simple Green synthesis method. The synthesized Ag nanoparticles were studied by the characterization techniques includes X-ray diffraction (XRD) crystallography for nature of crystalline with relevant parameters, Transmission electron microscopy (TEM) for particle size as well as the SAED patterns for amorphous, crystalline or polynanocrystalline and Photoluminescence analysis were carried out for the prepared NPs. Ag NPs were fabricated utilizing Phyto-aquatic extract of Cassia auriculata which act as a reducing agent, and it was converted into a precursor solution to coat on cotton fabrics for antibacterial applications. To further, its performance on anticancer application was studied for Michigan Cancer Foundation-7 (MCF-7) line breast cancer.

scholarly journals Green Synthesis, Characterization and Antibacterial Study of Ag-Au Bimetallic Nanocomposite using Tea Powder Extract

2020 ◽  
Vol 11 (1) ◽  
pp. 8087-8095
Keyword(s):  
Green Synthesis ◽  
Biological Behavior ◽  
X Ray Diffraction ◽  
Antibacterial Study ◽  
X Ray ◽  
Synthesis Of Nanoparticles ◽  
Transmission Electron ◽  
Silver Sample ◽  
Bimetallic Nanocomposite ◽  
Tea Extract

Synthesis of metal nanoparticles using plant extracts is attracted much to the recent researchers due to its simplicity, which integrates chemical technology. Special attention is given to the green synthesis of nanoparticles by easily available plants with an eco-friendly system compared to other conventional methods. Silver-Gold nanocomposite (Ag-Au NCp’s) is synthesized by bi reduction of silver nitrate and gold chloride. These metal salts are simultaneously reduced by tea extract to form respective silver and gold nanocomposite. The structure and morphology of as-prepared Ag-Au NCp’s sample were characterized by employing powder X-ray diffraction (XRD) tool and by Scanning Electron Micrograph (SEM) tool, respectively. Fourier Transform Infrared (FTIR) spectral study was undertaken to know the bonding in the prepared silver sample. Morphology and particle size of the above composite was studied by the Transmission electron microscope (TEM) tool. Energy-dispersive X-ray analysis (EDX) study was undertaken to know the formation of Ag-Au NCp’s. Antibacterial activity study is undertaken to know its biological behavior.

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