Investigation of Magnetic Iron Oxide Nanoparticle Properties with Co-Precipitation Methods under Different Reaction Conditions

2020 ◽  
Vol 10 ◽  
Author(s):  
Sema Salgın ◽  
Uğur Salgın ◽  
Nagihan Soyer
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Morphological Structure ◽  
Precipitation Method ◽  
Iron Oxide Nanoparticle ◽  
Hydrodynamic Diameter ◽  
Oxide Nanoparticles ◽  
Magnetic Iron Oxide Nanoparticles ◽  
Magnetic Iron Oxide ◽  
Co Precipitation

: In this study, magnetic iron oxide nanoparticles were synthesized by cost effective and an easy co-precipitation method. The effects of reaction parameters such as the mole ratio of Fe2+/Fe3+ (1/1, 1/2 and 1/3) and the base type (NaOH and NH4OH) on the average hydrodynamic diameter, zeta potential, chemical and morphological structure and saturation magnetization values of magnetic iron oxide nanoparticles were systematically investigated. Magnetic iron oxide nanoparticles synthesized at the mole ratio of 1/2 using NH4OH base gave better results in terms of particle size and particle shape, magnetization value. In order to prevent the formation of different phases in the co-precipitation method, an alternative approach was developed and the reaction was performed using inert supercritical CO2 atmosphere.

COLLOIDAL STABILITY AND MONODISPERSIBLE MAGNETIC IRON OXIDE NANOPARTICLES IN BIOTECHNOLOGY APPLICATION

2013 ◽  
Vol 12 (06) ◽  
pp. 1330002 ◽  
Author(s):  
K. SHAMILI ◽  
E. M. RAJESH ◽  
R. RAJENDRAN ◽  
S. R. MADHAN SHANKAR ◽  
M. ELANGO ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Biomedical Applications ◽  
Colloidal Stability ◽  
Oxide Nanoparticles ◽  
Magnetic Iron Oxide Nanoparticles ◽  
Magnetic Fluid Hyperthermia ◽  
Magnetic Iron Oxide ◽  
Magnetic Resonance Imaging Mri ◽  
Co Precipitation

Magnetic iron oxide nanoparticles are promising material for various biological applications. In the recent decades, magnetic iron oxide nanoparticles (MNPs) have great attention in biomedical applications such as drug delivery, magnetic resonance imaging (MRI) and magnetic fluid hyperthermia (MFH). This review focuses on the colloidal stability and monodispersity properties of MNPs, which pay more attention toward biomedical applications. The simplest and the most promising method for the synthesis of MNPs is co-precipitation. The biocompatible MNPs are more interested in MRI application. This review also apportions synthesis, characterization and applications of MNP in biological and biomedical as theranostics and imaging.

scholarly journals Preparation and Properties of Magnetic Iron Oxide Nanoparticles for Biomedical Applications: A Brief Review

2020 ◽  
Vol 75 (1) ◽  
pp. 10-18
Author(s):  
Mostafa Yusefi ◽  
Kamyar Shameli ◽  
Ahmad Faris Jumaat
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Biomedical Applications ◽  
Vital Role ◽  
Oxide Nanoparticles ◽  
Magnetic Iron Oxide Nanoparticles ◽  
Magnetic Iron Oxide ◽  
Research Areas ◽  
Co Precipitation ◽  
Multifunctional Properties

Magnetic Iron oxide in nanostructure form with multifunctional properties may play a vital role in myriad biomedical applications. Iron oxide nanoparticles (IONPs) are fabricated via various methods, including thermal decomposition, co-precipitation, polyol, bio-mineralization, and green synthesis processes. Therefore, different researchers produced IONPs via various techniques to show better water permeability, antioxidant activity, biocompatibility, biodegradability, and lower or no toxicity, as advantages compared to commercial magnetic agents used in innovative applications for modern societies. This review explains various fabrication methods of IONPs and their multifunctional properties. Overall, the new advanced approaches, issues and main challenges, surface modification and modern applications of IONPs are considered. Lastly, some future developments and the views in these research areas are also discussed.

scholarly journals SYNTHESIS AND CHARACTERIZATION OF SILICA COATED MAGNETIC IRON OXIDE NANOPARTICLES

2019 ◽  
Vol 57 (3A) ◽  
pp. 160
Author(s):  
Minh-Tri Nguyen-Le ◽  
Dinh Tien Dung Nguyen ◽  
Sophia Rich ◽  
Ngoc Tram Nguyen ◽  
Cuu Khoa Nguyen ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Magnetic Nanomaterials ◽  
Precipitation Method ◽  
Magnetic Saturation ◽  
Oxide Nanoparticles ◽  
Silica Layer ◽  
Magnetic Iron Oxide Nanoparticles ◽  
Magnetic Iron Oxide ◽  
Fe3o4 Nps

Advances in nanotechnology in recent years has led to a number of diverse applications of nanomaterials. Magnetic iron oxide nanoparticles (Fe3O4 NPs), a representative of magnetic nanomaterials, has gained much attention of many researchers all over the world due to their unique properties such as superparamagnetism, biocompatibility and high magnetic saturation. With such properties, Fe3O4 NPs can be exploited in many fields, particularly biomedicine related fields such as cellular therapy, tissue repair, drug delivery, magnetic resonance imaging, hyperthermia and magnetofection. However, owing to their self-aggregation of Fe3O4 NPs, it is necessary to coat Fe3O4 NPs with a stable and biocompatible silica layer. Therefore, in this report, Fe3O4 NPs were synthesized via a co-precipitation method using iron (II)/ iron (III) chloride, ammonia and trisodium citrate. Then, the silica layer was coated onto Fe3O4 NPs through the hydrolysis and condensation of tetraethyl orthosilicate (TEOS) in ethanol. The as-synthesized samples were charaterized with the infrared (IR) spectroscopy, X-ray diffraction (XRD) spectroscopy, thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), transmission electron microscopy (TEM) and dynamic light scattering (DLS). The results proved that silica was successfully coated on Fe3O4 NPs. The particle sizes measured by TEM were found to be about 12 nm in diameter for Fe3O4 NPs and 45 nm in diameter for silica coated Fe3O4 (SiO2@Fe3O4) NPs, while the dynamic diameters measured by DLS for Fe3O4 NPs and SiO2@Fe3O4 NPs were 15.7 and 65.8 nm, respectively. Both Fe3O4 NPs and SiO2@Fe3O4 NPs were superparamagnetic materials in which Fe3O4 NPs have higher magnetic saturation (45.8 emu/g) than the other (13.4 emu/g).This study examines the: ……...Advances in nanotechnology in recent years has led to a number of diverse applications of nanomaterials. Magnetic iron oxide nanoparticles (Fe3O4 NPs), a representative of magnetic nanomaterials, has gained much attention of many researchers all over the world due to their unique properties such as superparamagnetism, biocompatibility and high magnetic saturation. With such properties, Fe3O4 NPs can be exploited in many fields, particularly biomedicine related fields such as cellular therapy, tissue repair, drug delivery, magnetic resonance imaging, hyperthermia and magnetofection. However, owing to their self-aggregation of Fe3O4 NPs, it is necessary to coat Fe3O4 NPs with a stable and biocompatible silica layer. Therefore, in this report, Fe3O4 NPs were synthesized via a co-precipitation method using iron (II)/ iron (III) chloride, ammonia and trisodium citrate. Then, the silica layer was coated onto Fe3O4 NPs through the hydrolysis and condensation of tetraethyl orthosilicate (TEOS) in ethanol. The as-synthesized samples were charaterized with the infrared (IR) spectroscopy, X-ray diffraction (XRD) spectroscopy, thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), transmission electron microscopy (TEM) and dynamic light scattering (DLS). The results proved that silica was successfully coated on Fe3O4 NPs. The particle sizes measured by TEM were found to be about 12 nm in diameter for Fe3O4 NPs and 45 nm in diameter for silica coated Fe3O4 (SiO2@Fe3O4) NPs, while the dynamic diameters measured by DLS for Fe3O4 NPs and SiO2@Fe3O4 NPs were 15.7 and 65.8 nm, respectively. Both Fe3O4 NPs and SiO2@Fe3O4 NPs were superparamagnetic materials in which Fe3O4 NPs have higher magnetic saturation (45.8 emu/g) than the other (13.4 emu/g).

Carbon-Coated Magnetic Iron Oxide Nanoparticles as Green Catalysts for Aromatic Nitration

2020 ◽  
pp. 2150008
Author(s):  
Meera Parthasarathy ◽  
Srikanth Adigopula ◽  
Harichandana Gownivari ◽  
Gnanaprasanna Mudhivedu ◽  
Anitha Vasudevan ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Magnetic Iron Oxide Nanoparticles ◽  
One Pot ◽  
X Ray ◽  
Magnetic Iron Oxide ◽  
Nano Catalyst ◽  
Aromatic Nitration

Nitration of aromatic compounds is an important industrial process, which creates significant environmental pollution because of the harsh mineral acid catalysts. In this work, we report the synthesis and application of magnetic iron oxide nanoparticles as green catalysts for aromatic nitration. Magnetic iron oxide nanoparticles were synthesized by co-precipitation method and tested for nitration reactions on selected aromatic substrates, phenol, benzaldehyde, methylbenzoate, [Formula: see text]-cresol and [Formula: see text]-cresol. For the nitration reactions, sodium nitrite was used as the nitro-source and hydrogen peroxide as the oxidant. Effect of reaction conditions like, solvent, temperature and microwave treatment were studied. The magnetic nanoparticles were found to be more stable after coating with a carbon shell by a one-pot carbonization method. The reactions were fast with good product yield under solvent-free microwave conditions. The nano-catalyst was recovered magnetically after the reaction and reused for three batches of nitration, without significant loss in catalytic activity. The nanoparticles were characterized using scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), X-ray diffractometry (XRD) and FTIR spectroscopy.

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