Preparation and gas-sensing properties of CuFe2O4 at reduced temperature

Tao, Shanwen; Gao, Feng; Liu, Xingqin; Sørensen, Ole Henning

doi:10.1016/s0921-5107(00)00473-6

Cited by 159 publications

(78 citation statements)

References 14 publications

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“…ments [3,4], sensing materials [4][5][6][7], in high density memory devices, ferrofluid, drug carriers, and MRI contrast agents [8]. Magnesium ferrite (MgFe 2 O 4 ) is a soft magnet (space group Fd-3m) with low coercivities and high resistivities.…”

mentioning

confidence: 99%

Cation distribution and magnetic behavior of Mg1 − x Zn x Fe2O4 ceramics monitored by Mössbauer Spectroscopy

2006

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The properties of magnesium ferrites, Mg 1−x Zn x Fe 2 O 4 with 0.0 ≤ x ≤ 0.5, were investigated by means of powder X-ray diffraction, magnetization, Mössbauer spectroscopy, and scanning electron microscopy. The ferrites were prepared by conventional solid-state reaction using a mixed oxide method. All XRD patterns revealed only the monophasic spinel characteristic structure of MgFe 2 O 4 . The lattice parameters increased with the increasing of Zn content. Saturation magnetization (M S ) of the ferrites was discussed with respect to Zn substitution. M S values increased with Zn content up to x = 0.35 and then decreased thereafter. Mössbauer results showed Fe 3+ ion distribution between tetrahedral and octahedral sites and the effect of Zn ions on ferrimagnetic order. The line-broadening of the Mössbauer spectra increased with substituting Mg with Zn ions due to disruption of the local magnetic order. The SEM micrographs of the sintered bodies showed irregular shape in the order of ∼5-6 μm.

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confidence: 99%

Cation distribution and magnetic behavior of Mg1 − x Zn x Fe2O4 ceramics monitored by Mössbauer Spectroscopy

2006

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“…This results in a phase separation and the full reaction to the complex oxide also needs a temperature higher than 800°C. Besides, Tao et al [15] have employed a carbon free precursor, obtained using the co-precipitation method. After the decomposition of the dried precipitate at 600°C, the authors point out the formation of a pure copper ferrite "CuFe 2 O 4 ".…”

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Influence of the temperature and the oxygen partial pressure on the phase formation in the system Cu – Fe – O

Kenfack

Langbein²

2004

Cryst. Res. Technol.

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Copper iron oxides, Cu1‐xFe2+xO4 (0 ≤ x ≤ 0.5), have been synthesized by thermal oxidation of copper ‐ iron mixtures. In this process, the phase formation and the phase stability were investigated as function of the temperature (800°C – 1200°C) and the oxygen partial pressure (1.013 x 101 – 1.013 x 105 Pa). The phase formation starts with the reaction of the metallic components to simple oxides (Fe3O4, Fe2O3, CuO). From these simple oxides, the formation of complex oxides requires a minimum temperature of 800°C. The synthesis of single phase spinel compounds Cu2+1‐2x Cu1+xFe2+xO4±δ is realized for 0.1 ≤ x ≤ 0.5, using specific temperature – p(O2) – conditions for a given value of x. Remarkably, to achieve our goal, we found that the increase of x implies that of the reaction temperature and/or a decrease of the p(O2) in the reaction gas stream. Besides, a single phase spinel CuFe2O4 does not exist in the temperature / p(O2)‐field investigated. Using the results of XRD ‐ phase analysis, T ‐ p(O2) – x – diagrams were constructed. These diagrams allow the prediction of phase compositions expected for different synthesis conditions. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…Then the catalyst was ground in a mortar-pestle and kept in a furnace at 800°C at a heating rate of (2°C/min) and cooled to 100°C at (5°C/ min) in air. [52].…”

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Highly active magnetically separable CuFe2O4 nanocatalyst: an efficient catalyst for the green synthesis of tetrahydrofuro[3,4-b]quinoline-1,8(3H,4H) dione derivatives

et al. 2014

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A facile and efficient procedure has been reported for the synthesis of tetrahydrofuro [3,4-b]quinoline-1,8(3H,4H)-diones by the condensation reaction of benzaldehydes, 1,3-cyclohexanediones and anilinolactones in the presence of CuFe 2 O 4 as a reusable nanocatalyst with high catalytic activity in water. The notable advantages of this method are excellent isolated yields, short reaction times, simple workup procedure and little environmental impact.

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Preparation and gas-sensing properties of CuFe2O4 at reduced temperature

Cited by 159 publications

References 14 publications

Cation distribution and magnetic behavior of Mg1 − x Zn x Fe2O4 ceramics monitored by Mössbauer Spectroscopy

Cation distribution and magnetic behavior of Mg1 − x Zn x Fe2O4 ceramics monitored by Mössbauer Spectroscopy

Influence of the temperature and the oxygen partial pressure on the phase formation in the system Cu – Fe – O

Highly active magnetically separable CuFe2O4 nanocatalyst: an efficient catalyst for the green synthesis of tetrahydrofuro[3,4-b]quinoline-1,8(3H,4H) dione derivatives

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