Low-temperature wet chemistry synthetic approaches towards ferrites

Diodati, Stefano; Walton, Richard I.; Mascotto, Simone; Gross, Silvia

doi:10.1039/d0qi00294a

Cited by 40 publications

(17 citation statements)

References 334 publications

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“…In a forthcoming review article innovative synthesis routes to mixed-metal iron oxides will be surveyed, including the solvothermal synthesis of ferrite perovskites, [200] and here only the key findings in the case of the perovskites will be summarised. Extensive work has been carried out in the past decade on the solvothermal synthesis of the perovskite BiFeO3, and this has been driven by first its multiferroic properties, where the coexistence of magnetism and polar properties has emerged of being importance, [201] and second its potential use in photocatalysis, where its band gap is appropriate for solar light activation, and it has been widely studied for the degradation of organics.…”

Section: Ferrites and Ruthenatesmentioning

confidence: 99%

Perovskite Oxides Prepared by Hydrothermal and Solvothermal Synthesis: A Review of Crystallisation, Chemistry, and Compositions

Walton

2020

Chemistry A European J

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Section: Ferrites and Ruthenatesmentioning

confidence: 99%

Perovskite Oxides Prepared by Hydrothermal and Solvothermal Synthesis: A Review of Crystallisation, Chemistry, and Compositions

Walton

2020

Chemistry A European J

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“…Ferrite nanoparticles exhibit superparamagnetic properties, but most of them are prone to poor chemical stability. As a result, there is a need to modify the surface or add other elements. − Additionally, ferrite nanoparticles have a high surface-to-volume ratio and tend to aggregate. Therefore, it is necessary to develop a strategy for their in vivo applications to prevent aggregation.…”

Section: Introductionmentioning

confidence: 99%

One-Step Preparation of Highly Stable Copper–Zinc Ferrite Nanoparticles in Water Suitable for MRI Thermometry

et al. 2022

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Superparamagnetic ferrite nanoparticles coated with a polymer layer are widely used for biomedical applications. The objective of this work is to design nanoparticles as a magnetic resonance imaging (MRI) temperature-sensitive contrast agent. Copper–zinc ferrite nanoparticles coated with a poly(ethylene glycol) (PEG) layer are synthesized using a one-step thermal decomposition method in a polymer matrix. The resulting nanoparticles are stable in water and biocompatible. Using Mössbauer spectroscopy and magnetometry, it was determined that the grown nanoparticles exhibit superparamagnetic properties. Embedding these particles into an agarose gel resulted in significant modification of water proton relaxation times T 1 , T 2 , and T 2 * determined by nuclear magnetic resonance measurements. The results of the spin-echo T 2 -weighted MR images of an aqueous phantom with embedded Cu 0.08 Zn 0.54 Fe 2.38 O 4 nanoparticles in the presence of a strong temperature gradient show a strong correlation between the temperature and the image intensity. The presented results support the hypothesis that CuZn ferrite nanoparticles can be used as a contrast agent for MRI thermometry.

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“…Additionally, the tuning of the inversion factor can enhance the catalytic performance even more [ 1 , 7 ]. Due to the hardness of iron oxides and chemical stability of ferrites, another possible application is surface coatings for the protection of steel [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Microwave-Enhanced Crystalline Properties of Zinc Ferrite Nanoparticles

et al. 2022

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Two series of ZnFe2O4 mixed cubic spinel nanoparticles were prepared by a coprecipitation method, where a solution of Fe3+ and Zn2+ was alkalised by a solution of NaOH. While the first series was prepared by a careful mixing of the two solutions, the microwave radiation was used to enhance the reaction in the other series of samples. The effect of the microwave heating on the properties of the prepared particles is investigated. X-ray powder diffraction (XRD), 57Fe Mössbauer spectroscopy and magnetometry were employed to prove the cubic structure and superparamagnetic behavior of the samples. The particle size in the range of nanometers was investigated by a transmission electron microscopy (TEM), and the N2 adsorption measurements were used to determine the BET area of the samples. The stoichiometry and the chemical purity were proven by energy dispersive spectroscopy (EDS). Additionally, the inversion factor was determined using the low temperature Mössbauer spectra in the external magnetic field. The microwave heating had a significant effect on the mean coherent length. On the other hand, it had a lesser influence on the size and BET surface area of the prepared nanoparticles.

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Low-temperature wet chemistry synthetic approaches towards ferrites

Abstract: Solution chemistry allows the crystallisation of range of iron oxides, including MFe2O4 spinels, MFeO3 perovskites and hexaferrites, such as BaFe12O19, with nanoscale crystallinity and properties suitable for fields such as catalysis and electronics.

Cited by 40 publications

References 334 publications

Perovskite Oxides Prepared by Hydrothermal and Solvothermal Synthesis: A Review of Crystallisation, Chemistry, and Compositions

Perovskite Oxides Prepared by Hydrothermal and Solvothermal Synthesis: A Review of Crystallisation, Chemistry, and Compositions

One-Step Preparation of Highly Stable Copper–Zinc Ferrite Nanoparticles in Water Suitable for MRI Thermometry

Microwave-Enhanced Crystalline Properties of Zinc Ferrite Nanoparticles

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