Kinetics Study of the Solid State Reaction of Iron(III)Citrate Leading to Hematite Nanoparticles

Dey, Anubha; Zubko, Maciej; Kusz, Joachim; Bhattacharjee, Ashis

doi:10.2174/1877946809666190201131731

Cited by 4 publications

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“…Selection of a proper organo-iron molecular precursor with comparatively low decomposition temperature and a rational reaction protocol may result the desired magnetic iron oxide nanoparticles via solventless thermal decomposition route. The reaction mechanism involved as well as the energy required to initiate the decomposition reaction can be obtained by the reaction kinetic study [29,30]. In continuation of our earlier attempts [14,16] to prepare iron oxide nanoparticles, presently we report the synthesis of pure magnetite and hematite nanoparticles (size ~ 20 nm) using iron(II)acetate as the sole precursor under different reaction protocols.…”

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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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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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Solventless synthesis and characterization of α-Fe, γ-Fe, magnetite and hematite using iron(III)citrate

Dey

Zubko

Kusz

et al. 2019

Solid State Sciences

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Modulation of Solid-state Thermal Reaction of Iron(III)Citrate by a Co-precursor Studied using Thermogravimetry: Evaluation of Kinetic and Thermodynamic Parameters and Nucleation Rate

Kundu,

Chakraborty,

Bhattacharjee

2024

CPC

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Background:: Solid state reaction of iron(III)citrate leads to a range of ironbased oxides by varying the reaction conditions, e.g., the presence of co-precursor. The influence of reaction conditions on the kinetics of the solid-state reaction of iron(III)citrate needs to be investigated. Objective:: Kinetic analysis of the solid-state reaction of iron(III)citrate in the presence of a co-precursor has been explored to realize the influences of the co-precursor on the reaction process as well as decomposed material. Method:: Non-isothermal thermogravimetry profiles are deconvoluted to individual reaction steps. The model-free kinetic methodology is utilized to estimate step-wise activation energy and, hence, the reaction mechanism along with the reaction rate. Conversiondependent thermodynamic parameters and nucleation rate are estimated. XRD analysis has been used to characterize the decomposed material. Results:: Thermogravimetry profiles obtained for an iron(III)citrate and malonic acid mixture are deconvoluted into six steps. The decomposed nanomaterial is identified as magnetite (size 10 nm). The observed reaction mechanisms associated with each step are different, where the activation/reaction rate is conversion-dependent. A good fit between the experimental and reverse-constructed conversion profiles is obtained. The nucleation rate at higher temperatures is affected by both the extent of conversion and the heating rate. A possible reaction pathway is proposed. The study elucidates the role of malonic acid as a co-precursor in modifying the thermal reaction of iron(III)citrate and product formation. Conclusion:: This investigation proposes the applicability of suitable co-precursors as a potential controlling factor for preparing iron oxides from iron-based compounds.

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Kinetics Study of the Solid State Reaction of Iron(III)Citrate Leading to Hematite Nanoparticles

Cited by 4 publications

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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

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

Solventless synthesis and characterization of α-Fe, γ-Fe, magnetite and hematite using iron(III)citrate

Modulation of Solid-state Thermal Reaction of Iron(III)Citrate by a Co-precursor Studied using Thermogravimetry: Evaluation of Kinetic and Thermodynamic Parameters and Nucleation Rate

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