New vitreous nanocomposites containing phases of Fe3O4 and γ-KNO3

Pshenko, O. A.; Антропова, Т. В.; Arsent’ev, M. Yu.; Дроздова, И. А.

doi:10.1134/s1087659615050144

Cited by 13 publications

(3 citation statements)

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“…The introduction of Fe 2 O 3 into the NBS glass batch containing 70 mol% SiO 2 before melting was established to cause magnetite crystallization, which has ferrimagnetic properties [ 41 , 42 , 43 , 44 , 45 ]. Magnetite-containing PGs were used as a host matrix for multiferroic composite materials obtained by impregnating the pore space with ferroelectric phases [ 46 , 47 , 48 ]. It was demonstrated that adding Fe 2 O 3 to the NBS glass composition also changes the electro-surface characteristics of resulting PGs.…”

Section: Introductionmentioning

confidence: 99%

Novel Inorganic Membranes Based on Magnetite-Containing Silica Porous Glasses for Ultrafiltration: Structure and Sorption Properties

et al. 2023

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Porous glasses (PGs) obtained from sodium borosilicate (NBS) phase-separated glasses via leaching are promising inorganic membranes. Introducing Fe2O3 into NBS glasses imparts ferrimagnetic properties due to magnetite crystallization. Leaching of such glasses leads to the formation of magnetic PGs with interesting electro-surface characteristics. This work aimed to investigate the process of obtaining magnetite-containing PGs from NBS glasses depending on silica content, using XRPD and Raman spectroscopy, studying the PG membranes’ structural characteristics and their sorption properties with respect to methylene blue (MB). Obtained PGs were characterized by a polymodal distribution of mesopores and a small number of micropores with specific surface area values of 32–135 m2/g and an average mesopore diameter of 5–41 nm. The kinetic data were analyzed using pseudo-first-order, pseudo-second-order, and intra-particle diffusion equations. The equilibrium isotherms were fitted with Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich models. MB adsorption was found to be a complex process. The glass with the highest specific surface area demonstrated the maximum sorption capacity (10.5 mg/g). The pore size of PGs allowed them to be considered potential novel magnetic membranes for ultrafiltration.

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Section: Introductionmentioning

confidence: 99%

Novel Inorganic Membranes Based on Magnetite-Containing Silica Porous Glasses for Ultrafiltration: Structure and Sorption Properties

et al. 2023

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“…Magnetite imparts ferrimagnetic properties to glasses, which determines their potential application in medicine, 9 spintronics, 10‐12 induction heating applications, 13 etc. For example, phase‐separated NBS glasses containing magnetite in the silica‐rich phase were used for preparation of magnetic PGs via acid leaching 10,14,15 . Filling the pore space of such magnetic PGs with ferroelectric dopants allows one to obtain a multiferroic composite material with simultaneous ferroelectric and ferromagnetic orderings.…”

Section: Introductionmentioning

confidence: 99%

“…For example, phase-separated NBS glasses containing magnetite in the silica-rich phase were used for preparation of magnetic PGs via acid leaching. 10,14,15 Filling the pore space of such magnetic PGs with ferroelectric dopants allows one to obtain a multiferroic composite material with simultaneous ferroelectric and ferromagnetic orderings. Such composites are promising for sensors, transducers and actuators applications, as well as a nonvolatile memory elements and/or durable recording media with high stability and reliability of operation (FeRAM, FLESH-memory), etc.…”

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confidence: 99%

Mössbauer spectroscopy, XRPD, and SEM study of iron‐containing Na₂O‐B₂O₃‐SiO₂ glasses

et al. 2021

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Iron species are the most common impurities in glasses, therefore their effect on structure and properties of various glasses has long been of great scientific interest. Iron in glass is usually present in its Fe 3+ and/or Fe 2+ states as a result of the equilibrium established in the melt during synthesis. 1 Both of these types of iron ions can occupy sites with different oxygen coordination, which leads to different structural roles of iron ions in the glass network (network former and modifier), hence should affect the structure, crystallization and phase separation processes, which by-turn should influence the physical and chemical properties of the resulting glasses. The effect iron has on properties and structure also depends upon the base glass composition. The more complex the system is, the more ambiguous the iron's influence is. For example, borosilicate (BS) glasses have two glass-formers, hence combine their unique properties. One of the most studied BS systems is the sodium borosilicate (NBS) system. NBS glasses are approved in USA, France, UK, and other

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Structural and electrosurface properties of iron-containing nanoporous glasses in KNO3 solutions

Ермакова

Kuznetsova

Volkova

et al. 2019

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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New vitreous nanocomposites containing phases of Fe3O4 and γ-KNO3

Cited by 13 publications

References 11 publications

Novel Inorganic Membranes Based on Magnetite-Containing Silica Porous Glasses for Ultrafiltration: Structure and Sorption Properties

Novel Inorganic Membranes Based on Magnetite-Containing Silica Porous Glasses for Ultrafiltration: Structure and Sorption Properties

Mössbauer spectroscopy, XRPD, and SEM study of iron‐containing Na₂O‐B₂O₃‐SiO₂ glasses

Structural and electrosurface properties of iron-containing nanoporous glasses in KNO3 solutions

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New vitreous nanocomposites containing phases of Fe3O4 and γ-KNO3

Cited by 13 publications

References 11 publications

Novel Inorganic Membranes Based on Magnetite-Containing Silica Porous Glasses for Ultrafiltration: Structure and Sorption Properties

Novel Inorganic Membranes Based on Magnetite-Containing Silica Porous Glasses for Ultrafiltration: Structure and Sorption Properties

Mössbauer spectroscopy, XRPD, and SEM study of iron‐containing Na2O‐B2O3‐SiO2 glasses

Structural and electrosurface properties of iron-containing nanoporous glasses in KNO3 solutions

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Mössbauer spectroscopy, XRPD, and SEM study of iron‐containing Na₂O‐B₂O₃‐SiO₂ glasses