Preparation, structure and magnetic properties of synthetic ferrihydrite nanoparticles

Stolyar, S. V.; Yaroslavtsev, R. N.; Bayukov, O. A.; Balaev, D. A.; Krasikov, A. A.; Исхаков, Р. С.; Воротынов, А. М.; Ладыгина, В. П.; Пуртов, К. В.; Волочаев, М. Н.

doi:10.1088/1742-6596/994/1/012003

Cited by 10 publications

(9 citation statements)

References 12 publications

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“…In Figure 5, the magnetization response at room temperature for all the ferrihydrite samples is showed. The linear magnetic field dependence is consistent with the paramagnetic behavior found by most of the authors at ambient temperature, where also a contribution from antiferromagnetic susceptibility must be taken into account [23,55,56]. On the contrary, Pannalal et al [57] found a small hysteresis and departures from linearity in the initial part of the M(H) curve.…”

Section: Production and Characterization Of Ferrihydrite Npssupporting

confidence: 86%

“…Assuming Curie-like temperature dependence, these values correspond to about 2.5 µ B for Fh 0.1M and 3.0 µ B for the other three samples: In all cases less than the theoretical value (5.9 µ B ) for isolated Fe 3+ ions. susceptibility must be taken into account [23,55,56]. On the contrary, Pannalal et al [57] found a small hysteresis and departures from linearity in the initial part of the M(H) curve.…”

Section: Production and Characterization Of Ferrihydrite Npsmentioning

confidence: 97%

“…For its significant role as a precursor for hematite nanoparticles, as well as for its intrinsic properties, a widespread interest in the methods to synthesize ferrihydrite is ever growing. Actually, ferrihydrite is a biocompatible material, characterized by a high reactivity and high ion adsorption capacity, paramagnetic properties at room temperature, as well as by tunable band gap between 1.3 and 2.5 eV [1,23]. These properties lead to diffuse applicability in several fields, such as in magnetic applications, wastewater treatments, metallurgical industry, lithium ion batteries, or in agricultural germination and growth of maize [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…These properties lead to diffuse applicability in several fields, such as in magnetic applications, wastewater treatments, metallurgical industry, lithium ion batteries, or in agricultural germination and growth of maize [24][25][26][27][28]. The methods of synthesis are typically based on chemical precipitation routes [8,[23][24][25], but they require extra purification steps and long times to obtain the final product, so that the possibility to produce large amounts of ferrihydrite nanoparticles (NPs) with high yields is still a challenge.…”

Section: Introductionmentioning

confidence: 99%

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Nano-Sized Fe(III) Oxide Particles Starting from an Innovative and Eco-Friendly Synthesis Method

et al. 2020

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This paper introduces an original, eco-friendly and scalable method to synthesize ferrihydrite nanoparticles in aqueous suspensions, which can also be used as a precursor to produce α-hematite nanoparticles. The method, never used before to synthesize iron oxides, is based on an ion exchange process allowing to operate in one-step, with reduced times, at room temperature and ambient pressure, and using cheap or renewable reagents. The influence of reagent concentrations and time of the process on the ferrihydrite features is considered. The transformation to hematite is then analyzed and discussed in relation to different procedures: (1) A natural aging in the water at room temperature; and (2) heat treatments at different temperatures and times. Structural and morphological features of the obtained nanoparticles are investigated by means of several techniques, such as X-ray diffraction, X-ray photoelectron spectroscopy, attenuated total reflectance Fourier transform infrared spectroscopy, transmission and scanning electron microscopy, thermal analysis, nitrogen adsorption and magnetic measurements. Ferrihydrite shows the typical spherical morphology and a very high specific surface area of 420 m2/g. Rhombohedral or plate-like hexagonal hematite nanoparticles are obtained by the two procedures, characterized by dimensions of 50 nm and 30 nm, respectively, and a specific surface area up to 57 m2/g, which is among the highest values reported in the literature for hematite NPs.

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Section: Production and Characterization Of Ferrihydrite Npssupporting

confidence: 86%

Section: Production and Characterization Of Ferrihydrite Npsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nano-Sized Fe(III) Oxide Particles Starting from an Innovative and Eco-Friendly Synthesis Method

et al. 2020

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“…Ferrihydrite nanoparticles. Synthetic ferrihydrite particles, simple and doped with Co, were prepared as described earlier [ 40 , 41 ]. The copper-doped ferrihydrite sample was obtained using a similar procedure but with the addition of copper (III) salt to the reaction solution.…”

Section: Methodsmentioning

confidence: 99%

Exploring the Conformation and Thermal Stability of Human Serum Albumin Corona of Ferrihydrite Nanoparticles

Chilom

Bălan

Sandu

et al. 2020

IJMS

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In the last few years, a great amount of attention has been given to nanoparticles research due to their physicochemical properties that allow their use in analytical instruments or in promising imaging applications on biological systems. The use of ferrihydrite nanoparticles (Fh-NPs) in practical applications implies a particular control of their magnetic properties, stability, biocompatibility, interaction with the surface of the target, and low toxicity. In this study, the formation and organization of human serum albumin (HSA) molecules around the simple Fh-NPs and Fh-NPs doped with Co and Cu were examined by Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) in terms of morphology and particle size. The topology of all Fh-NPs shows an organized area of HSA around each type of Fh-NP. Molecular docking studies were used in order to determine the probable location of the ferrihydrite in the HSA structure. The thermal stability of these nanohybrids was further investigated by fluorimetry, using 214-Trp residue from HSA as a spectral sensor. The denaturation temperature (Tm) was determined, and stabilization of the HSA structure in the presence of Fh-NPs was discussed. This study could be a starting point for the development of different applications targeting the structure and stability of Fh-NPs complexes with proteins.

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Ferrihydrite nanoparticles produced by Klebsiella oxytoca: Structure and properties dependence on the cultivation time

Stolyar

Bayukov²,

Balaev³

et al. 2022

Advanced Powder Technology

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Preparation, structure and magnetic properties of synthetic ferrihydrite nanoparticles

Cited by 10 publications

References 12 publications

Nano-Sized Fe(III) Oxide Particles Starting from an Innovative and Eco-Friendly Synthesis Method

Nano-Sized Fe(III) Oxide Particles Starting from an Innovative and Eco-Friendly Synthesis Method

Exploring the Conformation and Thermal Stability of Human Serum Albumin Corona of Ferrihydrite Nanoparticles

Ferrihydrite nanoparticles produced by Klebsiella oxytoca: Structure and properties dependence on the cultivation time

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