Solventless synthesis, morphology, structure and magnetic properties of iron oxide nanoparticles

Das, Bratati; Kusz, Joachim; Reddy, ‬V. Raghavendra; Zubko, Maciej; Bhattacharjee, A.

doi:10.1016/j.solidstatesciences.2017.10.010

Cited by 12 publications

(19 citation statements)

References 28 publications

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“…The thermally decomposed material was used for physical characterizations like FT‐IR, powder XRD, SEM, TEM, magnetization measurements, and 57 Fe Mössbauer spectroscopy. The observed results confirmed that the decomposed materials are hematite (α‐Fe 2 O 3 ) nanoparticles .…”

Section: Experimental and Analytical Methodssupporting

confidence: 72%

“…The materials obtained on thermal decomposition of acetyl ferrocene have been characterized to be hematite . Search for any correlation existing between the reaction kinetic parameters and the morphology/structure of the resultant products may be an interesting study which is getting our present attention.…”

Section: Discussionmentioning

confidence: 99%

“…Thermal decomposition of organic iron precursors, in particular ferrocene materials, has been demonstrated to be very successful in the preparation of iron oxide nanoparticles with controllable size and high quality . In this light, in a recent study we have found that an organoiron precursor acetyl ferrocene on thermal decompositionin inert atmosphere produces hematite nanoparticles and the yield and the size of the product are significantly affected by the presence of a coprecursor . To understand the solid‐state reaction took place, first we intend to study the reaction mechanism of thermal decomposition of acetyl ferrocene by the nonisothermal thermogravimetry technique.…”

Section: Introductionmentioning

confidence: 99%

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Kinetic Analysis of Nonisothermal Decomposition of Acetyl Ferrocene

Das

Bhattacharjee

2018

Int J of Chemical Kinetics

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The work deals with thermal decomposition of acetyl ferrocene in nitrogen atmosphere based on nonisothermal thermogravimetry. It presents a mathematical analysis of nonisothermal thermogravimetric data using multiheating rates to estimate reaction kinetic parameters. Model free (integral isoconversional) methods are employed to analyze the thermogravimetric data. The decomposition is a multistep process. The activation energy Eα of decomposition is conversion (α) dependent. The average values of activation energy are Eα = 49.87, 106.28, and 183.35 kJ mol−1 for three major steps of decomposition. The most probable reaction mechanism function, g(α), for thermal reactions has been identified by the master plot method, and the stepwise reaction mechanisms are found to be different for different steps. The estimated values of the activation energy Eα and g(α) have been utilized in the determination of the reaction rate Aα of thermal decomposition. The α‐dependent reaction rate values are determined and are found to lie in the range of 5.2 × 105 to 3.2 × 104 min−1, 1.7 × 1015 to 7.8 × 106 min−1, and 3.8 × 108 to 1.4 × 107 min−1 for three different steps. Based on the values of Eα, g(α), and Aα, the thermodynamic triplets (ΔS, ΔH, ΔG) associated with the decomposition reactions have been estimated. Estimated kinetic parameters have been used to construct the conversion curves, and those have been successfully compared with the experimentally observed ones.

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Section: Experimental and Analytical Methodssupporting

confidence: 72%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Kinetic Analysis of Nonisothermal Decomposition of Acetyl Ferrocene

Das

Bhattacharjee

2018

Int J of Chemical Kinetics

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“…The selected literature was classified into four main groups:Methods of synthesis of IONPs [13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56]Characterization of IONPs [57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,…”

Section: Resultsmentioning

confidence: 99%

Magnetic Iron Oxide Nanoparticles: Synthesis, Characterization and Functionalization for Biomedical Applications in the Central Nervous System

et al. 2019

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Magnetic Nanoparticles (MNPs) are of great interest in biomedicine, due to their wide range of applications. During recent years, one of the most challenging goals is the development of new strategies to finely tune the unique properties of MNPs, in order to improve their effectiveness in the biomedical field. This review provides an up-to-date overview of the methods of synthesis and functionalization of MNPs focusing on Iron Oxide Nanoparticles (IONPs). Firstly, synthesis strategies for fabricating IONPs of different composition, sizes, shapes, and structures are outlined. We describe the close link between physicochemical properties and magnetic characterization, essential to developing innovative and powerful magnetic-driven nanocarriers. In conclusion, we provide a complete background of IONPs functionalization, safety, and applications for the treatment of Central Nervous System disorders.

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“…In magnetite at ~ 123 K, a charge-ordering transition (Verwey transition) occurs when an ordering of Fe 3+ and Fe 2+ ions within the octahedral sites occurs and a drop in magnetization at the transition temperature is the signature of magnetite [13,14]. On the other hand, at ~ 263 K, hematite exhibits a weak ferromagnetic to antiferromagnetic transition (Morin transition) owing to rearrangement of spins to antiparallel fashion along the rhombohedral (111) axis from a canted spin arrangement with respect to the basal (111) plane [15][16][17]. These magnetic phases of iron oxide along with subphases are very accurately detected by the application of Mӧssbauer spectroscopy [16,18].…”

Section: Introductionmentioning

confidence: 99%

Effect of reaction protocol on the nature and size of iron oxide nano particles obtained through solventless synthesis using iron(II)acetate: structural, magnetic and morphological studies

et al. 2020

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Magnetite and hematite nanoparticles (~ 20 nm size) have been synthesized by solventless thermal decomposition of iron(II)acetate in air under different reaction protocols. The structure of the decomposed materials is investigated by FT-IR and powder XRD, while the morphology of the particles formed was studied by SEM/TEM. The magnetic phases of the materials are quantitatively identified by 57 Fe Mӧssbauer spectroscopy. EDX was used for elemental analysis. The results obtained from FT-IR, XRD and Mӧssbauer studies explicitly establish that the materials obtained are iron oxides (magnetite and hematite). The study shows a reaction time-and temperature-dependent conversion of magnetite to hematite. The underlying solid state reactions have been discussed. The present study comes across that a single organo-iron precursor can provide different pure phases of iron oxide nanoparticles depending on the reaction protocol.

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Solventless synthesis, morphology, structure and magnetic properties of iron oxide nanoparticles

Cited by 12 publications

References 28 publications

Kinetic Analysis of Nonisothermal Decomposition of Acetyl Ferrocene

Kinetic Analysis of Nonisothermal Decomposition of Acetyl Ferrocene

Magnetic Iron Oxide Nanoparticles: Synthesis, Characterization and Functionalization for Biomedical Applications in the Central Nervous System

Effect of reaction protocol on the nature and size of iron oxide nano particles obtained through solventless synthesis using iron(II)acetate: structural, magnetic and morphological studies

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