Synthesis and characterization of yttrium-aluminum-iron and yttrium-cerium-iron citric complexes

Petrova, N.; Todorovsky, D.; Mitov, Ivan; Tyuliev, G.

doi:10.1016/s1002-0721(08)60086-1

Cited by 6 publications

(3 citation statements)

References 23 publications

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“…The TGA and differential thermogravimetry (DTG) curves of the precursor (Figure b) show that the thermal decomposition process proceeds via four stages under a N 2 atmosphere. According to the weight loss in each stage and the previous research on the thermal decomposition of the lanthanum citrate complex, the process of thermal decomposition of La−Fe citrate complex was proposed and shown in Scheme . At the first stage, a 10.9% weight loss from 120 to 350 °C is observed, which is attributed to the loss of crystallization water.…”

Section: Resultsmentioning

confidence: 89%

Controllable Synthesis of Pure-Phase Rare-Earth Orthoferrites Hollow Spheres with a Porous Shell and Their Catalytic Performance for the CO + NO Reaction

Tang

et al. 2010

Chem. Mater.

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Pure perovskite LnFeO3 (Ln = La, Pr−Tb) hollow spheres with porous shell and solid spheres (Ln = Dy−Yb, Y) have been successfully synthesized via calcination of a Ln-Fe citrate complex precursor, which was prepared via a convenient and effective hydrothermal method. The reaction parameters to obtain the Ln-Fe citrate complex with Ln/Fe = 1:1 can be calculated using a diagram of reaction species distribution in the solution. The calculated value was coincident well with the experimental one. The composition and the thermal decomposition processes of the Ln-Fe citrate complex were investigated carefully, using elemental analysis, inductively coupled plasma analysis (ICP), energy-dispersive spectroscopy (EDS), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The formation mechanism of the Ln-Fe citrate complex hollow spheres was proposed as an acidic digestion ripening process. Furthermore, all 13 pure-phase LnFeO3 microspheres had an excellent catalytic performance for the NO + CO reaction. The experimental results showed that the completed conversion of NO and specific selectivity of N2 were achieved, which could be comparable with the noble metal catalysts and better than that of LnFeO3 nanoparticles synthesized via the Pechini process. In addition, the LnFeO3 microspheres exhibited good chemical stability and almost invariable catalytic activity during the lifetime test lasting for 96 h.

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Section: Resultsmentioning

confidence: 89%

Controllable Synthesis of Pure-Phase Rare-Earth Orthoferrites Hollow Spheres with a Porous Shell and Their Catalytic Performance for the CO + NO Reaction

Tang

et al. 2010

Chem. Mater.

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“…200 mM) in blood plasma and forms strong complexes not only with natural metal ions such as Ca II , Mg II and Fe III , but also with ions of toxic (e.g. Al III ), ( Petrova et al, 2008) therapeutic (e.g. Bi III ) and diagnostic (e.g.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Potassium Dicitro Bismuthate Complex as Antigastric Ulcer

Taqa¹

2011

RJS

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The present study was designed to synthesis potassium dicitro bismuthate (III) complex. The complex was characterized by infrared spectra, conductivity and elemental analysis of Bi. The effect of gastro protection was investigated for the prepared complex against HCl-ethanol induced ulcer in rats. The complex was administered to rats at 50 and 100 mg\kg doses orally before one hour of receiving 0.2ml of HCl-ethanol mixture to induce gastric ulcer. Sucralfate (100mg\ kg, orally) was used as standard drug. The severity of gastro mucosal damage induced by HCl-ethanol was analyzed in term of ulcer index value. Administration of potassium dicitro bismuthate (III) one hour before HCl-ethanol had significantly decreased ulcer index value when compared to saline treated group. Sucralfate (100mg\kg, orally) also produced a significant decrease in ulcer index when compared with the saline treated group. There was no significant difference between potassium dicitro bismuthate (III) and Sucralfate in degree of protection against ulcer. Thus it can be concluded that potassium dicitro bismuthate (III) has antiulcer activity in rats.

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“…Nonmagnetic substitutions in iron garnets have provoked great interest for scientific studies of the effects caused by the magnetic dilution [17][18][19]. Several nonmagnetic cations occupy at least two nonequivalent magnetic sites with a more or less pronounced preference to one site [20].…”

Section: Introductionmentioning

confidence: 99%

Mössbauer studies of Y3Fe5 − xAlxO12 nanopowders prepared by mechanochemical method

et al. 2010

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A series of Al substituted yttrium iron garnet (Al-YIG) nanopowders with nominal formula of Y 3 Fe 5−x Al x O 12 which x varied in steps of 0.0, 0.5, 1.0, 1.5 and 2.0 were prepared via mechanochemical processing. The samples were milled for 40 h in a high energy planetary mill and then calcined at different temperatures from 1,300 to 1,100 • C. X-ray diffraction patterns reveal that the structure of nanopowders are bcc and the garnet phase has been obtained after calcining. The average crystallite sizes are in the range of 24-45 nm, using Scherrer's formula. The lattice constant of the samples decreases by increasing Al concentration. To investigate the site preference of Al 3+ ions, room temperature 57 Fe Mössbauer spectra for the samples were recorded and analyzed. The hyperfine field values for octahedral and tetrahedral sites of the samples decrease by increasing x value. This decrease in magnetic hyperfine field reflects a reduction of the superexchange interaction by the progressive substitution of Al for Fe, which is also evident in the behavior of the magnetization and T C for the samples.

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Synthesis and characterization of yttrium-aluminum-iron and yttrium-cerium-iron citric complexes

Cited by 6 publications

References 23 publications

Controllable Synthesis of Pure-Phase Rare-Earth Orthoferrites Hollow Spheres with a Porous Shell and Their Catalytic Performance for the CO + NO Reaction

Controllable Synthesis of Pure-Phase Rare-Earth Orthoferrites Hollow Spheres with a Porous Shell and Their Catalytic Performance for the CO + NO Reaction

Preparation of Potassium Dicitro Bismuthate Complex as Antigastric Ulcer

Mössbauer studies of Y3Fe5 − xAlxO12 nanopowders prepared by mechanochemical method

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