Physical Properties of Mn2O3 Nanoparticles Synthesized by Co-precipitation Method at Different pH Values

2018 ◽  
Vol 32 (4) ◽  
pp. 885-892 ◽  
Author(s):  
R. Najjar ◽  
R. Awad ◽  
A. M. Abdel-Gaber
Keyword(s):  
Physical Properties ◽  
Precipitation Method ◽  
Ph Values ◽  
Co Precipitation ◽  
Mn2o3 Nanoparticles

scholarly journals Influence of pH on Structural, Morphological, Optical, Photocatalytic, and Antibacterial Properties of Yttrium Oxide Nanoparticles via Co-Precipitation Method

2021 ◽  
Author(s):  
Kiruthika Parangusan ◽  
Venkat Subramanium ◽  
Lakshmanaperumal Sundarabharathi ◽  
Karthik Kannan ◽  
Devi Radhika
Keyword(s):  
Yttrium Oxide ◽  
Antibacterial Properties ◽  
Blue Emission ◽  
Precipitation Method ◽  
Diffusion Method ◽  
Bandgap Energy ◽  
Oxide Nanoparticles ◽  
Ph Values ◽  
Co Precipitation ◽  
Yttrium Oxide Nanoparticles

Abstract Yttrium oxide nanoparticles with multiform morphologies have been synthesized by the co-precipitation method. The structure, morphology, functional groups, optical and photoluminescence properties were examined through X-ray diffraction (XRD), Scanning electron microscope (SEM), Fourier transform infrared spectrometer (FTIR), UV-Visible (UV-Vis), Photoluminescence spectra (PL). The XRD patterns obtained for the samples synthesized at various pH values confirmed the cubic structure of Y2O3. The patterns obtained on the samples at pH values of 8 and 9 appeared as have sharp peaks suggested, that the samples were well crystallized. From UV-vis spectra, it revealed that the bandgap energy exhibits a blue shift in the absorption edge for the samples with the increase of pH due to their changing morphologies and surface structures. In the PL spectra, the obtained Y2O3 samples demonstrate an intense and bright UV and blue emission under the excitation wavelength range of 250 nm. The photocatalytic degradation of the Y2O3 nanostructure was studied against the Methylene blue (MB) dye under sunlight irradiation. The results showed good recital under solar light irradiation. Further, the antimicrobial activities of Y2O3 nanostructure against foodborne pathogens (Staphylococcus aureus and Salmonella typhi) were examined by using the disc diffusion method. Moreover, the Y2O3 nanostructure was found to be biocompatible.

scholarly journals Physical Properties Study of Zn<sub>0.5</sub>Mn<sub>0.5&#8722;x</sub>Li<sub>2x</sub>Fe<sub>2</sub>O<sub>4</sub> Nanoparticle Series that Prepared by Co-Precipitation Method

2019 ◽  
Vol 07 (11) ◽  
pp. 15-21
Author(s):  
N. A. Elthair ◽  
Yousef A. Alsabah ◽  
Eltayeb M. Mustafa ◽  
Abdelrahman A. Elbadawi ◽  
Abdal Sakhi Suliman ◽  
...  
Keyword(s):  
Physical Properties ◽  
Precipitation Method ◽  
Co Precipitation

INVESTIGATIONS ON NANOCRYSTALLINE SUPERPARAMAGNETIC PARTICLES OF CoFe2O4

2007 ◽  
Vol 06 (06) ◽  
pp. 515-519 ◽  
Author(s):  
R. P. PANT ◽  
VINOD KUMAR ◽  
S. K. HALDER ◽  
S. K. GUPTA ◽  
SUKHVIR SINGH
Keyword(s):  
Physical Properties ◽  
Cobalt Ferrite ◽  
Annealing Effect ◽  
Precipitation Method ◽  
Vibrating Sample Magnetometer ◽  
Paramagnetic Resonance ◽  
X Ray ◽  
Transmission Electron ◽  
Co Precipitation ◽  
Electron Paramagnetic

Superparamagnetic (SP) crystalline cobalt ferrite ( CoFe 2 O 4) nanoparticles are synthesized by chemical co-precipitation method. Grown nanoparticles are annealed in air at various temperatures in the range 373 K to 1173 K to understand the variation in properties in nanoregion. Physical properties are analyzed for crystalline phase, crystallite size, particle size, shape, magnetization and relaxation behavior by using various characterization techniques viz. X-ray diffractometer (XRD), transmission electron microscope (TEM), vibrating sample magnetometer (VSM) and electron paramagnetic resonance (EPR). Annealing effect on various physical properties of particles are investigated. Particles are used in the development of stable ferrofluid.

scholarly journals Synthesis and Characterization of Soft Magnetic Materials NixZn1-xFe2O4 (x = 0,2 – 0,8) Lombok Iron Sand with Co-precipitation Method

2021 ◽  
Vol 3 (1) ◽  
pp. 21-28
Author(s):  
Nining S Asri
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Physical Properties ◽  
Nickel Content ◽  
Average Particle Size ◽  
Precipitation Method ◽  
Average Particle ◽  
True Density ◽  
Soft Magnetic ◽  
Co Precipitation

The synthesis of soft magnetic NixZn1-xFe2O4 with variations in composition (x = 0,2 – 0,8) by the co-precipitation method has been carried out. The research objective was to determine the effect of x variation on the crystal structure, microstructure, magnetic properties, and density. The samples were characterized by their crystal structure using XRD, microstructure using FE-SEM, magnetic properties using VSM, and physical properties (True Density). The XRD analysis results obtained two phases, the major phase is nickel-zinc ferrite, and Fe2O3 shows as the minor phase. The crystal size increased and the lattice parameters decreased with the increase in nickel content. The results of FE-SEM analysis at x = 0.2 are spherical in shape with an average particle size found about 47.07 nm. The results of VSM analysis showed that the increase in nickel content, the higher the magnetization saturation value, and the super-paramagnetic properties of all samples obtained. The results of the analysis of physical properties show that true density decreases with an increase of nickel content in each sample.

scholarly journals Influence of Dextran Molecular Weight on the Physical Properties of Magnetic Nanoparticles for Hyperthermia and MRI Applications

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2468
Author(s):  
Oliver Strbak ◽  
Iryna Antal ◽  
Iryna Khmara ◽  
Martina Koneracka ◽  
Martina Kubovcikova ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Magnetic Nanoparticles ◽  
Physical Properties ◽  
Magnetic Measurements ◽  
Linear Regression Analysis ◽  
Precipitation Method ◽  
Coated Particles ◽  
Molecular Weights ◽  
Magnetic Resonance Imaging Mri ◽  
Co Precipitation

Dextran-coated magnetic nanoparticles are promising biocompatible agents in various biomedical applications, including hyperthermia and magnetic resonance imaging (MRI). However, the influence of dextran molecular weight on the physical properties of dextran-coated magnetic nanoparticles has not been described sufficiently. We synthesise magnetite nanoparticles with a dextran coating using a co-precipitation method and study their physical properties as a function of dextran molecular weight. Several different methods are used to determine the size distribution of the particles, including microscopy, dynamic light scattering, differential centrifugal sedimentation and magnetic measurements. The size of the dextran-coated particles increases with increasing dextran molecular weight. We find that the molecular weight of dextran has a significant effect on the particle size, efficiency, magnetic properties and specific absorption rate. Magnetic hyperthermia measurements show that heating is faster for dextran-coated particles with higher molecular weight. The different molecular weights of the coating also significantly affected its MRI relaxation properties, especially the transversal relaxivity r2. Linear regression analysis reveals a statistically significant dependence of r2 on the differential centrifugal sedimentation diameter. This allows the targeted preparation of dextran-coated magnetic nanoparticles with the desired MRI properties. These results will aid the development of functionalised magnetic nanoparticles for hyperthermia and MRI applications.

Physical Properties of Encapsulated Iron Oxide

2019 ◽  
Vol 966 ◽  
pp. 277-281 ◽  
Author(s):  
Togar Saragi ◽  
Bayu Permana ◽  
Arnold Therigan ◽  
Sahrul Hidayat ◽  
Norman Syakir ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Physical Properties ◽  
Magnetic Characteristic ◽  
Domain Size ◽  
Precipitation Method ◽  
Iron Oxide Particles ◽  
Oxide Particles ◽  
Co Precipitation ◽  
Loop Measurement ◽  
Ferromagnetic Characteristic

The size effect of magnetic nanoparticles provides a various magnetic characteristic as a change of domain size. We report, synthesis of core-shell iron oxide and magnetic properties. Iron oxide particles were synthesized by co-precipitation method of iron (III) FeCl3.6H2O, iron (II) FeCl2.4H2O, in the mixture of with or without TEOS to investigated the physical properties. From XRD measurement, it was observed that all iron oxide particles with or without mixture of SiO2 has a hematite phase of a-Fe2O3. From M-H loop measurement, it was observed that the iron oxide without SiO2 has a ferromagnetic characteristic, while the iron oxide with SiO2 showed a medium state as a contribution of superparamagnetic and ferromagnetic properties.

Sign in / Sign up

Export Citation Format

Share Document