Synthesis and characterization of high purity Fe3O4 and α - Fe2O3 from local iron sand

Dewi, Sari Hasnah; Adi, Wisnu Ari

doi:10.1088/1742-6596/1091/1/012021

Cited by 12 publications

(6 citation statements)

References 8 publications

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“…The size distribution of these particles was also high, i.e., FWHM of 670.94 nm, resulting from the variation in particle aggregate sizes. The XRD pattern obtained for the synthesized particles were in accordance with the pattern observed in the XRD database for iron oxide (COD: 9013529) [32] (Figure 2c). The zeta potential of UIONPs was found to be dependent on the pH of the dispersion media, varying from positive to negative, as the pH was changed from acidic to alkaline (Figure 2d).…”

Section: Characterization Of Uncoated Iron Oxide Nanoparticles and Norsupporting

confidence: 82%

pH-driven enhancement of anti-tubercular drug loading on iron oxide nanoparticles for drug delivery in macrophages

Cotta¹,

Mehra²,

Bandyopadhyaya³

2021

Beilstein J. Nanotechnol.

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Nanoparticle deployment in drug delivery is contingent upon controlled drug loading and a desired release profile, with simultaneous biocompatibility and cellular targeting. Iron oxide nanoparticles (IONPs), being biocompatible, are used as drug carriers. However, to prevent aggregation of bare IONPs, they are coated with stabilizing agents. We hypothesize that, zwitterionic drugs like norfloxacin (NOR, a fluoroquinolone) can manifest dual functionality – nanoparticle stabilization and antibiotic activity, eliminating the need of a separate stabilizing agent. Since these drugs have different charges, depending on the surrounding pH, drug loading enhancement could be pH dependent. Hence, upon synthesizing IONPs, they were coated with NOR, either at pH 5 (predominantly as cationic, NOR+) or at pH 10 (predominantly as anionic, NOR−). We observed that, drug loading at pH 5 exceeded that at pH 10 by 4.7–5.7 times. Furthermore, only the former (pH 5 system) exhibited a desirable slower drug release profile, compared to the free drug. NOR-coated IONPs also enable a 22 times higher drug accumulation in macrophages, compared to identical extracellular concentrations of the free drug. Thus, lowering the drug coating pH to 5 imparts multiple benefits – improved IONP stability, enhanced drug coating, higher drug uptake in macrophages at reduced toxicity and slower drug release.

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Section: Characterization Of Uncoated Iron Oxide Nanoparticles and Norsupporting

confidence: 82%

pH-driven enhancement of anti-tubercular drug loading on iron oxide nanoparticles for drug delivery in macrophages

Cotta¹,

Mehra²,

Bandyopadhyaya³

2021

Beilstein J. Nanotechnol.

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“…39.1346), it is clearly seen that the as-prepared iron oxide material is either Fe3O4 or γ-Fe2O3. However, Fe3O4 material was transferred to γ-Fe2O3 at 200 C due to magnetite oxidation and their similar to crystal structures [18], [34], [35], [36]. Thus, the crystallite of the synthesized iron oxide in this work indicates a crystal structure of γ-Fe2O3.…”

Section: Model Evaluationmentioning

confidence: 68%

Application of an artificial neural network and QCM sensor coated with γ-Fe2O3 nanoparticles for estimation of SO2 gas sensing characteristics

Thanh

Tuan

Cương

et al. 2022

JSTT

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γ-Fe2O3 nanoparticles (NPs) were synthesized by co-precipitation method and a following annealing treatment at 200 °C in ambient air for 6 hours. A mass-type sensor was prepared by coating γ-Fe2O3 NPs on the active electrode of quartz crystal microbalance (QCM). The obtained results of the γ-Fe2O3 NPs based QCM sensor indicate the high response and good repeatability toward SO2 gas in the range of 2.5 – 20 ppm at room temperature. Moreover, the frequency shift (DF) and change in mass of SO2 adsorption per unit area (Dm) of the γ-Fe2O3 NPs coated QCM sensor have a relationship with the mass density of γ-Fe2O3 NPs and SO2 concentrations. The artificial neural network (ANN) model using Levenberg-Marquardt optimization was used to handle the DF and Dm of the γ-Fe2O3 NPs coated QCM sensor. The results of the model validation proved to be a reliable way between the experiment and prediction values.

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“…Fasahematite has curie temperatures above 800 ºC and below 1000 ºC (Song & Pistorius, 2019). To produce α-Fe 2O3 nanoparticles is carried out using several methods, including the solgel method, from which the particle size of α-Fe2O3 between 10 -20 nm, the hydrothermal method with a particle size of 30 nm, the ball miling method, with a particle size of 99.14 μm -93.34 μm, and the coprecipitation method, with a particle size of 22.8899 nm (Dewi & Adi, 2018;Fahlepy et al, 2019;Gandha et al, 2017;Malik & Putra, 2018; Various nanostructures have been studied on hematite by varying the synthesis process. The nanostructures formed during the synthesis and fabrication process also depend on different factors such as synthesis methods, types of precursors, stabilizers, substrates, and not to mention their parameters, for example, temperature and time variations in the synthesis process.…”

Section: Hematite Nanostructure (α-Fe2o3)mentioning

confidence: 99%

Fe2O3 Review: Nanostructure, Synthesis Methods, and Applications

Novita,

Ramlan,

Naibaho

et al. 2024

IJSSR

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Iron sand, which contains magnetite iron ore, exhibits unique magnetic properties when exposed to magnetic fields. Iron ore content, including ?-Fe2O3, FeTiO3, Magnetite (Fe3O4), and others, provides potential uses in various industries such as electronics, energy, chemical, ferrofluids, catalysts, and biomedicine. The location of the discovery of iron sand can affect its mineral characteristics and geological conditions. This research aims to develop innovative synthesis methods to produce hematite nanomaterials from iron sand. Nano-size hematite nanoparticles exhibit unique characteristics, including an increase in specific surface area that is beneficial in applications such as gas sensors, catalysts, lithium-ion batteries, and the manufacture of permanent magnets. Through a literature review, this article presents comprehensive insights into the characteristics of iron sand, variations in synthesis methods, and the structure of hematite nanoparticles. Applications of hematite nanoparticles in water treatment, catalysis, and energy storage are also detailed. This article is expected to contribute to the development of innovative nanomaterial technologies as well as explore the potential of iron sand resources for wider industrial applications.

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Synthesis and characterization of high purity Fe₃O₄ and α - Fe₂O₃ from local iron sand

Cited by 12 publications

References 8 publications

pH-driven enhancement of anti-tubercular drug loading on iron oxide nanoparticles for drug delivery in macrophages

pH-driven enhancement of anti-tubercular drug loading on iron oxide nanoparticles for drug delivery in macrophages

Application of an artificial neural network and QCM sensor coated with γ-Fe2O3 nanoparticles for estimation of SO2 gas sensing characteristics

Fe2O3 Review: Nanostructure, Synthesis Methods, and Applications

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