Thermally synthesized nanosized copper ferrites as catalysts for environment protection

Tsoncheva, Tanya; Manova, Elina; Velinov, Nikolay; Paneva, Daniela; Popova, Margarita; Kunev, B.; Tenchev, K.; Mitov, Ivan

doi:10.1016/j.catcom.2010.08.007

Cited by 76 publications

(30 citation statements)

References 20 publications

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“…After thermal treatment at 400 • C, only one low broad diffraction peak was observed corresponding to α-Fe 2 O 3 . As calcination temperature Table 1 The average particle sizes and molar fraction of ion species for Cu-Fe composite oxides obtained from XRD patterns [4]. And a greater degree of crystallinity and crystallite growth was observed at higher temperature, which was proved by the increased particle sizes in Table 1.…”

Section: Resultsmentioning

confidence: 92%

“…Based on these, Yokoyama et al [3] observed the changes in the crystal structure of nanosized CuFe 2 O 4 obtained by coprecipitation and subsequently annealed, and proved that the copper spinel is cubic phase at temperatures below 300 • C and tetragonal phase over 400 • C. While this structure changes was determined at higher temperature over 500 • C, for which nanosized copper ferrites were prepared by thermal method from the corresponding hydroxide carbonate precursors [4]. This transformation is ascribed to the changed of Cu 2+ in the B-sublattice.…”

Section: Cufe-400mentioning

confidence: 96%

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Magnetism and phase transformation of Cu-Fe composite oxides prepared by the sol-gel route

et al. 2013

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The Cu-Fe composite oxides were prepared by an epoxide assisted sol-gel route. The structural and magnetic properties of Cu-Fe composite oxides calcinated at different temperatures were determined by X-ray diffraction (XRD), Mössbauer spectroscopy measurements, and magnetic measurements. These results indicated that CuFe 2 O 4 was only formed as calcination temperature increased to 500 • C, and a crystalline phase transformation from c-CuFe 2 O 4 to t-CuFe 2 O 4 occurred in elevating calcination temperature above it. All Cu-Fe oxides had ferromagnetic nature, and the significant superparamagnetic behavior was observed in the results of magnetic and Mössbauer spectroscopy measurements.

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Section: Resultsmentioning

confidence: 92%

Section: Cufe-400mentioning

confidence: 96%

Magnetism and phase transformation of Cu-Fe composite oxides prepared by the sol-gel route

et al. 2013

View full text Add to dashboard Cite

show abstract

“…As calcination temperature Table 1 The average particle sizes and molar fraction of ion species for Cu-Fe composite oxides obtained from XRD patterns [4]. And a greater degree of crystallinity and crystallite growth was observed at higher temperature, which was proved by the increased particle sizes in Table 1.…”

Section: Resultsmentioning

confidence: 92%

“…• C, for which nanosized copper ferrites were prepared by thermal method from the corresponding hydroxide carbonate precursors [4]. This transformation is ascribed to the changed of Cu 2+ in the B-sublattice.…”

Section: Cufe-400mentioning

confidence: 99%

Magnetism and phase transformation of Cu-Fe composite oxides prepared by the sol-gel route

Xiao¹,

Jin²,

Wang³

et al. 2013

Isiame 2012

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The Cu-Fe composite oxides were prepared by an epoxide assisted sol-gel route. The structural and magnetic properties of Cu-Fe composite oxides calcinated at different temperatures were determined by X-ray diffraction (XRD), Mössbauer spectroscopy measurements, and magnetic measurements. These results indicated that CuFe 2 O 4 was only formed as calcination temperature increased to 500• C, and a crystalline phase transformation from c-CuFe 2 O 4 to t-CuFe 2 O 4 occurred in elevating calcination temperature above it. All Cu-Fe oxides had ferromagnetic nature, and the significant superparamagnetic behavior was observed in the results of magnetic and Mössbauer spectroscopy measurements.

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“…Several parameters such as nanoparticle size, purity, morphology, crystallinity and their distribution are important factors influencing the physical properties of nanoparticles [15][16][17][18][19][20][21][22]. These parameters can be affected by their production methods.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis and characterization of magnetic MnFe2O4/CNT nanocomposites

et al. 2014

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In this paper, the effects of carbon nanotubes (CNTs) were studied as supports for the synthesis of MnFe 2 O4 nanocomposite. The synthesis of nanocomposite powder MnFe 2 O 4 /CNTs was performed by direct precipitation method in aqueous solution. The prepared samples were analyzed by X-ray diffraction, scanning electron microscopy and Fourier transform infrared spectroscopy. The results represent the considerable change in the MnFe 2 O 4 nanoparticle size and also the morphology of MnFe 2 O 4 /CNT nanocomposite powder from agglomerative into nanorod in shape.

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Thermally synthesized nanosized copper ferrites as catalysts for environment protection

Cited by 76 publications

References 20 publications

Magnetism and phase transformation of Cu-Fe composite oxides prepared by the sol-gel route

Magnetism and phase transformation of Cu-Fe composite oxides prepared by the sol-gel route

Magnetism and phase transformation of Cu-Fe composite oxides prepared by the sol-gel route

Facile synthesis and characterization of magnetic MnFe2O4/CNT nanocomposites

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