Efficient synthesis of superparamagnetic magnetite nanoparticles under air for biomedical applications

Saxena, Namita; Singh, Man

doi:10.1016/j.jmmm.2017.01.031

Cited by 35 publications

(14 citation statements)

References 44 publications

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“…All the samples were precipitated from water solutions (300 mL) of FeCl 2 ·4H 2 O (4.3 g) and FeCl 3 ·6H 2 O (11.6 g) by instant addition of 25 wt% NH 4 OH at an increased temperature (80 °C) [ 44 ]. Since the magnetite surface is positively charged below a point of zero charge (PZC magnetite is about pH = 8) [ 45 ], while the humate polyanion is negatively charged in almost the entire pH range, and at the same time, the crystallization process of magnetite phase is most favorable in the pH range of 8–14 [ 46 , 47 ], the syntheses were performed in the pH range of 7.5–7.7 for successful adsorption of the polyanion onto the surface in a one-step process. When a black precipitate was obtained, a solution was aged for 30 min at the same temperature (80 °C).…”

Section: Methodsmentioning

confidence: 99%

Microwave-Assisted Synthesis of Water-Dispersible Humate-Coated Magnetite Nanoparticles: Relation of Coating Process Parameters to the Properties of Nanoparticles

et al. 2020

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Nowadays, there is a demand in the production of nontoxic multifunctional magnetic materials possessing both high colloidal stability in water solutions and high magnetization. In this work, a series of water-dispersible natural humate-polyanion coated superparamagnetic magnetite nanoparticles has been synthesized via microwave-assisted synthesis without the use of inert atmosphere. An impact of a biocompatible humate-anion as a coating agent on the structural and physical properties of nanoparticles has been established. The injection of humate-polyanion at various synthesis stages leads to differences in the physical properties of the obtained nanomaterials. Depending on the synthesis protocol, nanoparticles are characterized by improved monodispersity, smaller crystallite and grain size (up to 8.2 nm), a shift in the point of zero charge (6.4 pH), enhanced colloidal stability in model solutions, and enhanced magnetization (80 emu g−1).

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Section: Methodsmentioning

confidence: 99%

Microwave-Assisted Synthesis of Water-Dispersible Humate-Coated Magnetite Nanoparticles: Relation of Coating Process Parameters to the Properties of Nanoparticles

et al. 2020

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“…Iron oxide based magnetic nanoparticles (IONPs) have received remarkable attention in a wide range of applications because of their unique physicochemical properties inherent to the nanoscale. Small size, high surface area, quantum confinement, and novel magnetic and optical effects open up new fields for application of iron oxides [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…The IONPs show ability for the biomedical application; they need to possess suitable core size and monodispersity, acceptable hydrodynamic diameter, high saturation magnetization (Ms), high stability in biological fluid media, to be biocompatible and degradable with reduced toxicity over a large time scale, capable of clearance from the body post imaging [1][2][3][4][5][6][7]9,11]. Critical requirements for biomedical related fields are good values of magnetization and ability to form stable aqueous dispersions.…”

Section: Introductionmentioning

confidence: 99%

“…Below approximately 30 nm size they start behaving superparamagnetically at room temperature. Larger values of susceptibility and magnetic moment with smaller values of coercivity and remanence make them most desirable for various biomedical applications [2][3][4]6,10,11].…”

Section: Introductionmentioning

confidence: 99%

“…There are several established SPIONs synthesis methods, including co-precipitation, microemulsion, sol-gel, hydrothermal and thermal decomposition [2,[7][8][9][12][13][14][15][16]18,20,22,24,25,[28][29][30], each of those displaying advantages as well as drawbacks.…”

Section: Introductionmentioning

confidence: 99%

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One-Step Soft Chemical Synthesis of Magnetite Nanoparticles under Inert Gas Atmosphere. Magnetic Properties and In Vitro Study

et al. 2020

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Iron oxide nanoparticles have received remarkable attention in different applications. For biomedical applications, they need to possess suitable core size, acceptable hydrodynamic diameter, high saturation magnetization, and reduced toxicity. Our aim is to control the synthesis parameters of nanostructured iron oxides in order to obtain magnetite nanoparticles in a single step, in environmentally friendly conditions, under inert gas atmosphere. The physical–chemical, structural, magnetic, and biocompatible properties of magnetite prepared by hydrothermal method in different temperature and pressure conditions have been explored. Magnetite formation has been proved by Fourier-transform infrared spectroscopy and X-ray diffraction characterization. It has been found that crystallite size increases with pressure and temperature increase, while hydrodynamic diameter is influenced by temperature. Magnetic measurements indicated that the magnetic core of particles synthesized at high temperature is larger, in accordance with the crystallite size analysis. Particles synthesized at 100 °C have nearly identical magnetic moments, at 20 × 103 μB, corresponding to magnetic cores of 10–11 nm, while the particles synthesized at 200 °C show slightly higher magnetic moments (25 × 103 μB) and larger magnetic cores (13 nm). Viability test results revealed that the particles show only minor intrinsic toxicity, meaning that these particles could be suited for biomedical applications.

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Synthesis, characterization, and functionalization of superadhesive melamine formaldehyde polyvinylpyrrolidone resins doped with metallic and graphene oxide nanoparticles for better industrial applications

Pan

Upadhyay

Singh

et al. 2022

J of Applied Polymer Sci

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Structure of melamine‐formaldehyde‐polyvinylpyrrolidone (MFP) polymer resin prepared with melamine, formaldehyde, polyvinyl pyrrolidone (PVP) at pH=7 was determined using FTIR, 1H NMR, and 13C NMR spectroscopy. Physicochemical properties and thermal stability were analyzed with dynamic light scattering (DLS) and thermogravimetric analysis (TGA) respectively. 1H NMR spectra showed doublet at 3.13 and 3.17 ppm due to neighboring electron‐deficient nitrogen and electron density of bridged carbon atoms. The 13C NMR have infrared vinyl chain, melamine, and pyrrolidone peak for C=O, 48.72 ppm depicts C atom of −CH2 between O and C atoms. Peak at 17.50 ppm inferred terminal −CH3 of vinyl chain. FTIR stretching frequencies at 3426.38 and 2915.5 cm−1 vibrations depicted −N= (tertiary amine), and −CH2 group of −()CH2−CH2n vinyl chain of PVP, respectively. New band at 2350 cm−1 inferred –CH2 of formaldehyde attached with O atoms of PVP. MFP was doped with Fe3O4 (magnetic nanoparticles = MNPs), CaS (calcium sulfide), CaO, and graphene nanoparticles for reinforcement. Encapsulated Fe3O4–MFPR, CaS–MFPR, graphene oxide–MFPR are compared with MFPR alone. TGA inferred higher stability of Fe3O4–MFPR, CaS–MFPR.

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Efficient synthesis of superparamagnetic magnetite nanoparticles under air for biomedical applications

Cited by 35 publications

References 44 publications

Microwave-Assisted Synthesis of Water-Dispersible Humate-Coated Magnetite Nanoparticles: Relation of Coating Process Parameters to the Properties of Nanoparticles

Microwave-Assisted Synthesis of Water-Dispersible Humate-Coated Magnetite Nanoparticles: Relation of Coating Process Parameters to the Properties of Nanoparticles

One-Step Soft Chemical Synthesis of Magnetite Nanoparticles under Inert Gas Atmosphere. Magnetic Properties and In Vitro Study

Synthesis, characterization, and functionalization of superadhesive melamine formaldehyde polyvinylpyrrolidone resins doped with metallic and graphene oxide nanoparticles for better industrial applications

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