scholarly journals Morphology and Structural Properties of Undoped and Cobalt Doped Magnetic Iron Oxide Particles for Improving the Environmental Quality

2020 ◽  
Vol 9 (6) ◽  
pp. 18-21 ◽  
Keyword(s):  
Iron Oxide ◽  
Structural Properties ◽  
Industrial Applications ◽  
X Ray Diffraction ◽  
Iron Oxide Particles ◽  
Natural Sand ◽  
X Ray ◽  
Magnetic Iron Oxide ◽  
Milling Method ◽  
Oxide Particles

Doping of metal ions in magnetic iron oxide particles can improve its performance and lead to its new technological and industrial applications. Magnetic iron oxide particles of undoped and cobalt doped were synthesized from natural sand of Logas District Kuansing Regency by ball milling method. The structural properties and the morphology of the magnetic iron oxide F e2O3 particles were analyzed using X-Ray Diffractometer (XRD) and scanning electron microscope (SEM). The X-ray diffractometric study showed that X-ray diffraction (XRD) peaks shift to slightly higher angles as compared to those of undoped magnetic iron oxide particles. This shift is due to relatively smaller ionic radius of cobalt as compared to those for iron. Moreover, peaks corresponding to cobalt oxide or metal cobalt could not be observed in the diffraction pattern. Some other diffraction peaks from other crystalline forms such as silicon (Si) and titanium (Ti) were observed.

Preparation of Magnetic Iron Oxide by Hydrothermal Method

2014 ◽  
Vol 904 ◽  
pp. 107-110
Author(s):  
Fu Yan Zhao ◽  
Ya Ling Li ◽  
Chao Lv ◽  
Lu Hai Li
Keyword(s):  
Crystal Structure ◽  
Thermal Analysis ◽  
Iron Oxide ◽  
Hydrothermal Method ◽  
X Ray Diffraction ◽  
Iron Oxide Particles ◽  
X Ray ◽  
Magnetic Iron Oxide ◽  
Oxide Particles ◽  
Different Shapes

Abstract. Iron oxide particles with spherical, date-pit like, or polyhedron morphology were obtained by hydrothermal method. The morphology, thermal analysis, crystal structure of the products was characterized by FESEM, thermogravimetry (TG), X-ray diffraction (XRD), respectively. The measured results reveal that the product of three different shapes is hematite (α-Fe2O3).

scholarly journals Discovery of Fe7O9: a new iron oxide with a complex monoclinic structure

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Ryosuke Sinmyo ◽  
Elena Bykova ◽  
Sergey V. Ovsyannikov ◽  
Catherine McCammon ◽  
Ilya Kupenko ◽  
...  
Keyword(s):  
Applied Sciences ◽  
Crystal Structure ◽  
Iron Oxide ◽  
Iron Oxides ◽  
Industrial Applications ◽  
Ambient Conditions ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Pressure High Temperature ◽  
Insight Into

Abstract Iron oxides are fundamentally important compounds for basic and applied sciences as well as in numerous industrial applications. In this work we report the synthesis and investigation of a new binary iron oxide with the hitherto unknown stoichiometry of Fe7O9. This new oxide was synthesized at high-pressure high-temperature (HP-HT) conditions, and its black single crystals were successfully recovered at ambient conditions. By means of single crystal X-ray diffraction we determined that Fe7O9 adopts a monoclinic C2/m lattice with the most distorted crystal structure among the binary iron oxides known to date. The synthesis of Fe7O9 opens a new portal to exotic iron-rich (M,Fe)7O9 oxides with unusual stoichiometry and distorted crystal structures. Moreover, the crystal structure and phase relations of such new iron oxide groups may provide new insight into the cycling of volatiles in the Earth’s interior.

The Behavior of Surface Hydroxyl Group of Magnetic Iron Oxide Particles

Ferrites ◽  
1982 ◽  
pp. 545-547
Author(s):  
Hiroshi Sugihara ◽  
Yasuta Taketomi ◽  
Tatsuo Uehori ◽  
Yasuo Imaoka
Keyword(s):  
Iron Oxide ◽  
Hydroxyl Group ◽  
Iron Oxide Particles ◽  
Magnetic Iron Oxide ◽  
Surface Hydroxyl ◽  
Oxide Particles

scholarly journals Microwave Assisted Phytosynthesis and Characterization of Magnetic Iron Oxide Quantum Dots using Moringa oleifera

2018 ◽  
Vol 15 (2) ◽  
pp. 145-150 ◽  
Author(s):  
G. Deepthi Reddy ◽  
M. Noorjahan ◽  
K.Girija Mangatayaru ◽  
M. Krishnakanth
Keyword(s):  
Quantum Dots ◽  
Iron Oxide ◽  
Moringa Oleifera ◽  
Structural Characteristics ◽  
Aqueous Media ◽  
Diffraction Method ◽  
Visible Spectrum ◽  
X Ray Diffraction ◽  
X Ray ◽  
Magnetic Iron Oxide

Magnetic Iron Oxide Quantum Dots (MIOQDs) were synthesized using Moringa oleifera leaves through green technique i.e., Microwave treatment. The synthetic method is highly rapid, simple and economical. MIOQDs were formed by reduction of ferric chloride (FeCl3) solution with Moringa oleifera leaf extract without any influence of alkaline conditions which opens a new arena for the phytosynthesis of nanoparticles. MIOQDs structural characteristics were scrutinized by Powder X-ray diffraction method, FESEM, TEM, UV –Visible Spectroscopy, Photoluminescence Emission Spectroscopy. The ultraviolet-visible spectrum recorded for the aqueous media iron nanoparticles showed an absorption peak at around 330 nm. Powder X-ray diffraction showed that the particles are crystalline in nature, with both hematite and maghemite structure.

scholarly journals Magnetic Particles: Their Applications from Sample Preparations to Biosensing Platforms

Micromachines ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 302 ◽  
Author(s):  
Seong-Eun Kim ◽  
My Van Tieu ◽  
Sei Young Hwang ◽  
Min-Ho Lee
Keyword(s):  
Iron Oxide ◽  
Magnetic Materials ◽  
Magnetic Particles ◽  
Ease Of Use ◽  
Iron Oxide Particles ◽  
Scientific Publications ◽  
Magnetic Iron Oxide ◽  
Automation Systems ◽  
Target Molecules ◽  
Oxide Particles

The growing interest in magnetic materials as a universal tool has been shown by an increasing number of scientific publications regarding magnetic materials and its various applications. Substantial progress has been recently made on the synthesis of magnetic iron oxide particles in terms of size, chemical composition, and surface chemistry. In addition, surface layers of polymers, silica, biomolecules, etc., on magnetic particles, can be modified to obtain affinity to target molecules. The developed magnetic iron oxide particles have been significantly utilized for diagnostic applications, such as sample preparations and biosensing platforms, leading to the selectivity and sensitivity against target molecules and the ease of use in the sensing systems. For the process of sample preparations, the magnetic particles do assist in target isolation from biological environments, having non-specific molecules and undesired molecules. Moreover, the magnetic particles can be easily applied for various methods of biosensing devices, such as optical, electrochemical, and magnetic phenomena-based methods, and also any methods combined with microfluidic systems. Here we review the utilization of magnetic materials in the isolation/preconcentration of various molecules and cells, and their use in various techniques for diagnostic biosensors that may greatly contribute to future innovation in point-of-care and high-throughput automation systems.

Octylamine as a novel fuel for the preparation of magnetic iron oxide particles by an aqueous auto–ignition method

2019 ◽  
Vol 805 ◽  
pp. 545-550 ◽  
Author(s):  
Basam A.E. Ben-Arfa ◽  
Farzin Mohseni ◽  
Isabel M. Miranda Salvado ◽  
JoséM.F. Ferreira ◽  
João S. Amaral ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Particles ◽  
Magnetic Iron Oxide ◽  
Auto Ignition ◽  
Oxide Particles

Magnetic Iron Oxide Particles Coated with Carboxydextran for Parenteral Administration and Liver Contrasting

1997 ◽  
Vol 38 (4) ◽  
pp. 584-597 ◽  
Author(s):  
R. Lawaczeck ◽  
H. Bauer ◽  
T. Frenzel ◽  
M. Hasegawa ◽  
Y. Ito ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Half Life ◽  
Liver Tumors ◽  
Spin Echo ◽  
Tumor Model ◽  
Hydrodynamic Diameter ◽  
Iron Oxide Particles ◽  
Magnetic Iron Oxide ◽  
Rat Tumor Model ◽  
Oxide Particles

Rationale and objectives: To evaluate the physical and pharmacological profiles of SH U555A, a suspension of magnetic iron oxide particles that is designed to enhance the visualization of liver tumors and metastases. Material and Methods: Chemical and physical methods were used to characterize the size and structure of these magnetic iron oxide particles in aqueous solution. The biodistribution and pharmacokinetics of the particles were studied in mice, rats and dogs. The imaging efficacy of the particles was demonstrated by MR imaging in rat liver tumors Results: The SH U555A particles consist of low-molecular-weight carboxydextran-coated iron oxides predominantly of the γ-Fe2O3 form with a hydrodynamic diameter ranging from 57-59 nm and strong T2 relaxivity of 164 liters * mmol−1 * S−1 (water, 0.47 T). In rats the particles exhibited a dose-dependent half-life of between 2 and 3 days in the liver at a dose of 20 μmol Fe/kg and a shorter half-life at lower doses. No major side effects were found. In a rat tumor model the tumor-to-liver contrast was markedly improved after i.v. administration of SH U555A. At a dose of 14 μmol Fe/kg the half-maximal contrast-effect was obtained even in nonoptimized T1-weighted spin-echo images. Conclusion: SH U555A is a superparamagnetic MR contrast agent for i.v. administration and has substantial potential for the demarcation of liver tumors.

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