Mössbauer Studies of the Structure of Core/Shell Fe3O4/γ-Fe2O3 Nanoparticles

Kamzin, A. S.; Kim, Hee-Je; Valliulin, A. A.; Семенов, В. Г.; Al‐Omari, I. A.; Nayek, Chiranjib

doi:10.1134/s1063785019050079

Cited by 7 publications

(2 citation statements)

References 17 publications

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“…From the 15 K 57 Fe Mössbauer data, we start by saying that we did not notice the presence of Fe 3 O 4 remaining; of course, the spectra for the five samples were well-resolved with bulk γ-Fe 2 O 3 components and not with a combination of sextets that could lead us to infer an Fe 3 O 4 @γ-Fe 2 O 3 core–shell configuration, as claimed in many works. − Therefore, careful analysis of the nano iron oxide samples is extremely important because, for instance, the surface adsorption phenomenon is strongly dependent on the valence and configuration of Fe ions at the NPs surface. Therefore, the knowledge of the aging effect of the samples is fundamental for further applications.…”

Section: Raman Tem Stem and Saed Analysismentioning

confidence: 99%

In Situ and after Synthesis of Magnetic Nanoarchitectures Grown onto Zeolite Type 5A/CTAB Frameworks and Their Ecotoxicological Properties

Moyano-Arocutipa

Zarria-Romero

Huertas-Chambilla

et al. 2023

Crystal Growth & Design

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Controlled-size maghemite (γ-Fe2O3) nanoparticles (NPs) were functionalized with zeolite 5A and cetyltrimethylammonium bromide (CTAB) by the co-precipitation method. The in situ and after NPs synthesis procedures were used to obtain five different nanomaterials that were broadly characterized by various physicochemical methods to ensure magnetic remediation properties. γ-Fe2O3 NPs with sizes ranging from 4.5 to 12 nm were obtained for bare NPs and also dispersed in matrices of zeolites and CTAB. Acute toxicity tests were systematically performed in the freshwater biomarker microcrustacean Daphnia magna to figure out the impact of these nanohybrids in living beings that are part of real effluents. The lethal concentrations were found to range from 103.2 mg L−1for bare γ-Fe2O3 NPs to 0.5 mg L–1 for the series of nanohybrids studied here. Morphological analysis of living beings showed some significant changes in their vital structures (heart and eye) and some malformations in some part of their eyes. This study has provided novel information on the magnetic properties of bare and functionalized iron oxide based NPs and, more relevant, their interactions and impacts on the cladoceran D. magna under controlled conditions that could be expanded to real environments after industrial water treatment.

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Section: Raman Tem Stem and Saed Analysismentioning

confidence: 99%

In Situ and after Synthesis of Magnetic Nanoarchitectures Grown onto Zeolite Type 5A/CTAB Frameworks and Their Ecotoxicological Properties

Moyano-Arocutipa

Zarria-Romero

Huertas-Chambilla

et al. 2023

Crystal Growth & Design

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“…The magnetic and exchange interactions inside an individual nanoparticle, along with the interparticle interactions, are of great importance for the formation of macroscopic properties of the entire magnetic system, as well as for the effective interaction of its individual particles with an ac electromagnetic field. Within this paradigm, MFe 2 O 4 (M = Fe, Co, Mn) particles and core-shell ferrite nanoparticles consisting of a hard magnetic core (CoFe 2 O 4 ) and a magnetite shell (Fe 3 O 4 ) have recently been studied to check the efficiency of their use in hyperthermia [9][10][11][12][13][14][15]. The magnetic measurements show that the coat-ing of the CoFe 2 O 4 hard magnetic phase with magnetite ensures a fairly high coercivity and thereby enhances the efficiency of magnetic hyperthermia.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Magnetic Properties of the Core–Shell Fe3O4/CoFe2O4 Nanoparticles

Balaev¹,

Semenov²,

Dubrovskiĭ³

et al. 2020

Phys. Solid State

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The Fe 3 O 4 /CoFe 2 O 4 nanoparticles with a core-shell structure with an average size of 5 nm have been obtained by codeposition from the iron and cobalt chloride solutions. An analysis of the magnetic properties of the obtained system and their comparison with the data for single-phase Fe 3 O 4 (4 nm) and CoFe 2 O 4 (6 nm) nanoparticles has led to the conclusion about a noticeable interaction between the soft magnetic (Fe 3 O 4 ) and hard magnetic (CoFe 2 O 4 ) phases forming the core and shell of hybrid particles.

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Recent Progress in Mössbauer Studies of Iron-Based Spinel Oxide Nanoparticles

Vejpravová

2021

Surfaces and Interfaces of Metal Oxide Thin Films, Multilayers, Nanoparticles and Nano-Composites

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Mössbauer Studies of the Structure of Core/Shell Fe3O4/γ-Fe2O3 Nanoparticles

Cited by 7 publications

References 17 publications

In Situ and after Synthesis of Magnetic Nanoarchitectures Grown onto Zeolite Type 5A/CTAB Frameworks and Their Ecotoxicological Properties

In Situ and after Synthesis of Magnetic Nanoarchitectures Grown onto Zeolite Type 5A/CTAB Frameworks and Their Ecotoxicological Properties

Synthesis and Magnetic Properties of the Core–Shell Fe3O4/CoFe2O4 Nanoparticles

Recent Progress in Mössbauer Studies of Iron-Based Spinel Oxide Nanoparticles

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