Effect of Grain Size on Structural and Magnetic Properties of CuFe$_{2}$O$_{4}$ Nanograins Synthesized by Chemical Co-Precipitation

Hoque, S. Manjura; Kader, Sakia Shabnam; Paul, D. P.; Saha, D. K.; Das, Harinarayan; Rana, Masud; Chattopadhyay, K.; Hakim, M. A.

doi:10.1109/tmag.2011.2173207

Cited by 8 publications

(5 citation statements)

References 17 publications

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“…Copper ferrite, CuFe 2 O 4 was synthesized via a co-precipitation reaction adapted from prior reports. 12,13 An aqueous solution with stoichiometric equivalents of copper(II) nitrate hemipentahydrate, Cu(NO 3 ) 2 Á2.5H 2 O and iron(III) nitrate nonahydrate, Fe(NO 3 ) 3 Á9H 2 O was added to an aqueous solution of sodium hydroxide, NaOH. The mixture was washed, refluxed, washed again and dried under vacuum at 80 1C.…”

Section: Synthesis Of Copper Ferrite Cufe 2 Omentioning

confidence: 99%

Redox chemistry of a binary transition metal oxide (AB₂O₄): a study of the Cu²⁺/Cu⁰ and Fe³⁺/Fe⁰ interconversions observed upon lithiation in a CuFe₂O₄ battery using X-ray absorption spectroscopy

Cama

Pelliccione

Brady

et al. 2016

Phys. Chem. Chem. Phys.

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Copper ferrite, CuFe2O4, is a promising candidate for application as a high energy electrode material in lithium based batteries. Mechanistic insight on the electrochemical reduction and oxidation processes was gained through the first X-ray absorption spectroscopic study of lithiation and delithiation of CuFe2O4. A phase pure tetragonal CuFe2O4 material was prepared and characterized using laboratory and synchrotron X-ray diffraction, Raman spectroscopy, and transmission electron microscopy. Ex situ X-ray absorption spectroscopy (XAS) measurements were used to study the battery redox processes at the Fe and Cu K-edges, using X-ray absorption near-edge structure (XANES), extended X-ray absorption fine structure (EXAFS), and transmission X-ray microscopy (TXM) spectroscopies. EXAFS analysis showed upon discharge, an initial conversion of 50% of the copper(ii) to copper metal positioned outside of the spinel structure, followed by a migration of tetrahedral iron(iii) cations to octahedral positions previously occupied by copper(ii). Upon charging to 3.5 V, the copper metal remained in the metallic state, while iron metal oxidation to iron(iii) was achieved. The results provide new mechanistic insight regarding the evolution of the local coordination environments at the iron and copper centers upon discharging and charging.

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Section: Synthesis Of Copper Ferrite Cufe 2 Omentioning

confidence: 99%

Redox chemistry of a binary transition metal oxide (AB₂O₄): a study of the Cu²⁺/Cu⁰ and Fe³⁺/Fe⁰ interconversions observed upon lithiation in a CuFe₂O₄ battery using X-ray absorption spectroscopy

Cama

Pelliccione

Brady

et al. 2016

Phys. Chem. Chem. Phys.

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“…There are numerous methods for fabricating copper ferrite nanoparticles such as milling method, co-precipitation method, and hydrothermal method. [11][12][13] In our previous work, 14 cation distribution and magnetic properties of copper ferrite prepared by using a spray co-precipitation method with different annealing temperatures were investigated. The result indicated that with increasing annealing temperature (T a ), the distribution of Cu 2þ in the tetrahedral (A) site (y) increases, reaches the maximum value at T a ¼ 900 C, and leads to the increase in saturation magnetization.…”

Section: Introductionmentioning

confidence: 99%

Cation distribution in CuFe2O4 nanoparticles: Effects of Ni doping on magnetic properties

Thanh

Loan

Anh

et al. 2016

Journal of Applied Physics

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The Cu1−xNixFe2O4 nanoparticles (with x = 0, 0.3, 0.5, 0.7, and 1) were synthesized by using spray co-precipitation method at annealing temperature Ta = 900 °C in air for 5 h. The crystal structure, microstructure, oxidation state, and magnetic properties of the samples were characterized by using X-ray diffraction, synchrotron X-ray diffraction, scanning electron microscopy, X-ray absorption spectroscopy, and vibrating sample magnetometer. It was shown that all the samples have cubic structure. Lattice constant and grain size decrease, while the Curie temperature TC increases with increasing of Ni2+ content. A small amount of Fe2+ was found in all the samples. Cation distribution was determined by using a combination of magnetization measurements, extended X-ray absorption fine structure analysis, and Rietveld refinement from synchrotron X-ray diffraction data. It was indicated that Ni2+ ions occupy in octahedral site only, while Cu2+ ions distribute in both tetrahedral and octahedral sites. The variation of magnetic parameters is discussed based on Ni2+ concentration, grain size, the cation distribution, surface effect, and the presence of Fe2+ ion in the samples.

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“…Wet-chemical syntheses have been developed to obtain fine-grained and nano-sized CuFe 2 O 4 powders [19,20,21,22]. A microwave assisted hydrothermal process was reported by Thongtem et al [23].…”

Section: Introductionmentioning

confidence: 99%

Crystallite-growth, phase transition, magnetic properties, and sintering behaviour of nano-CuFe2O4 powders prepared by a combustion-like process

Köferstein

Walther

Hesse

et al. 2014

Journal of Solid State Chemistry

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Crystallite-growth, phase transition, magnetic properties, and sintering behaviour of nano-CuFe2O4 powders prepared by a combustion-like process. Journal of Solid State Chemistry, Elsevier, 2014, 213, pp.Abstract. The synthesis of nano-crystalline CuFe 2 O 4 powders by a combustion-like process is described herein. Phase formation and evolution of the crystallite size during the decomposition process of a (CuFe 2 )-precursor gel were monitored up to 1000 °C. Phase-pure nano-sized CuFe 2 O 4 powders were obtained after reaction at 750 °C for 2 h resulting in a crystallite size of 36 nm, which increases to 96 nm after calcining at 1000 °C. The activation energy of the crystallite growth process was calculated as 389 kJ mol −1 . The tetragonal cubic phase transition occurs between 402 and 419 °C and the enthalpy change (∆H) was found to range between 1020 and 1229 J mol −1 depending on the calcination temperature. The 2 optical band gap depends on the calcination temperature and was found between 2.03 and 1.89 eV. The shrinkage and sintering behaviour of compacted powders were examined. Dense ceramic bodies can be obtained either after conventional sintering at 950 °C or after a twostep sintering process at 800 °C. Magnetic measurements of both powders and corresponding ceramic bodies show that the saturation magnetization rises with increasing calcination-/ sintering temperature up to 49.1 emu g −1 (2.1 µ B f.u. −1 ), whereas the coercivity and remanence values decrease.

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Effect of Grain Size on Structural and Magnetic Properties of CuFe$_{2}$O$_{4}$ Nanograins Synthesized by Chemical Co-Precipitation

Cited by 8 publications

References 17 publications

Redox chemistry of a binary transition metal oxide (AB₂O₄): a study of the Cu²⁺/Cu⁰ and Fe³⁺/Fe⁰ interconversions observed upon lithiation in a CuFe₂O₄ battery using X-ray absorption spectroscopy

Redox chemistry of a binary transition metal oxide (AB₂O₄): a study of the Cu²⁺/Cu⁰ and Fe³⁺/Fe⁰ interconversions observed upon lithiation in a CuFe₂O₄ battery using X-ray absorption spectroscopy

Cation distribution in CuFe2O4 nanoparticles: Effects of Ni doping on magnetic properties

Crystallite-growth, phase transition, magnetic properties, and sintering behaviour of nano-CuFe2O4 powders prepared by a combustion-like process

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Effect of Grain Size on Structural and Magnetic Properties of CuFe$_{2}$O$_{4}$ Nanograins Synthesized by Chemical Co-Precipitation

Cited by 8 publications

References 17 publications

Redox chemistry of a binary transition metal oxide (AB2O4): a study of the Cu2+/Cu0 and Fe3+/Fe0 interconversions observed upon lithiation in a CuFe2O4 battery using X-ray absorption spectroscopy

Redox chemistry of a binary transition metal oxide (AB2O4): a study of the Cu2+/Cu0 and Fe3+/Fe0 interconversions observed upon lithiation in a CuFe2O4 battery using X-ray absorption spectroscopy

Cation distribution in CuFe2O4 nanoparticles: Effects of Ni doping on magnetic properties

Crystallite-growth, phase transition, magnetic properties, and sintering behaviour of nano-CuFe2O4 powders prepared by a combustion-like process

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Redox chemistry of a binary transition metal oxide (AB₂O₄): a study of the Cu²⁺/Cu⁰ and Fe³⁺/Fe⁰ interconversions observed upon lithiation in a CuFe₂O₄ battery using X-ray absorption spectroscopy

Redox chemistry of a binary transition metal oxide (AB₂O₄): a study of the Cu²⁺/Cu⁰ and Fe³⁺/Fe⁰ interconversions observed upon lithiation in a CuFe₂O₄ battery using X-ray absorption spectroscopy