Structural analysis of cobalt titanate nanoparticles obtained by sol?gel process

Pacheco, Fernanda; González, Martha Letícia Gaeta; Medína, A.; Velumani, S.; Ascencio, J.A.

doi:10.1007/s00339-003-2454-4

Cited by 21 publications

(14 citation statements)

References 27 publications

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“…The XRD peak patterns (Fig. ) of the thin films deposited from precursor ( 1 ) at 500 °C indicate its clean decomposition as it did not show any impurities such as TiO 2 , Co 2 O 3 , Co 3 O 4 , Co 2 TiO 4 or CoTi 2 O 4 which were frequently observed in earlier studied cobalt titanium oxide preparative methods involving heating to 600 °C and above …”

Section: Resultsmentioning

confidence: 66%

“…Cobalt titanium oxide powders have been prepared via different synthetic routes, such as conventional solid‐state reactions between fine powders, sol–gel processes, stearic acid gel methods, aerogel approaches, the Pechini process, co‐precipitation of mixed metal oxalates and micelle solution methods . These methods generally involve mechanical mixing of oxides and/or carbonates followed by heating cycles, calcination and ball milling for extended periods.…”

Section: Introductionmentioning

confidence: 99%

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Cobalt titanate–cobalt oxide composite thin films deposited from heterobimetallic precursor

Ehsan

Mansoor

Mazhar

et al. 2012

Applied Organom Chemis

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A single molecular heterobimetallic complex, [Co2Ti(μ3‐O)(TFA)6(THF)3] (1) [TFA = trifluoroacetate, THF = tetrahydrofuran], was synthesized, structurally and spectroscopically characterized and implemented as a single‐source precursor for the preparation of CoTiO3–CoO composite thin films by aerosol‐assisted chemical vapour deposition (AACVD). The precursor complex was prepared by interaction of Co(OAc)2.4H2O [OAc = (CH3COO−)] with Ti(iso‐propoxide)4 in the presence of trifluoroacetic acid in THF, and was analysed by melting point, CHN, FT‐IR, single‐crystal X‐ray diffraction and thermogravimetric analysis. The precursor complex thermally decomposed at 480 °C to give a residual mass corresponding to a CoTiO3–CoO composite material. Good‐quality crystalline CoTiO3–CoO composite thin films deposited at 500 °C by AACVD and characterized through powder X‐ray diffraction and scanning electron microscopy/energy‐dispersive X‐ray spectroscopy show that the crystallites have a rose‐flower‐like morphology with an average petal size in the range of 2–6 µm. Copyright © 2012 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Cobalt titanate–cobalt oxide composite thin films deposited from heterobimetallic precursor

Ehsan

Mansoor

Mazhar

et al. 2012

Applied Organom Chemis

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“…However, the ceramic method suffers from several disadvantages such as non-uniform distribution of grains, longer schedule of heating cycles etc. There have been many chemical methods such as co-precipitation, polymerized complexes and sol-gel that have been reported as alternate strategies to synthesize these titanates [9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

CoTiO3 via cobalt oxalate–TiO2 precursor. Synthesis and characterization

Gabal

Hameed

Obaid

2012

Materials Characterization

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“…During the storage of the hydrous titanium dioxide, decreasing of its hydration degree and increasing of titanium content takes place. Therefore, using TiOSO 4 and TiO 2 . nH 2 O, as the starting materials to prepare other titanium compounds, needs control of titanium and iron concentration.…”

Section: +mentioning

confidence: 99%

“…Among them CoTiO 3 is considered as the most important cobalt titanate due to its high thermal stability, even at temperatures above 1000 o C, weak magnetism, semiconductivity, acousto-optic and electro-optic properties and high dielectric constant value of approximately 40 2 -4 . Therefore, CoTiO 3 can be used, for example, as semiconducting device 2 2+ can be easily prepared by dissolving of cobalt sulfate in water. The proceeding of the reaction between these two ions possessing the same charge requires the presence of OH -ions, which were introduced with NaOH aqueous solution.…”

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confidence: 99%

Preparation of cobalt titanates via co-precipitation while using industrial intermediates as titanium precursors

Przepiera

Płaska

Przepiera

et al. 2009

Polish Journal of Chemical Technology

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This paper reports on the results of cobalt titanates preparation by calcination of green bodies obtained by a co-precipitation method. For the investigations were used: as titanium sources, acidic solutions of titanyl sulfate and hydrous titanium dioxide, originating from the production process of titanium dioxide by sulfate method. The composition of the obtained materials was determined using titration methods. The calcined powders were characterized by X-ray diffraction method. It has been found that the obtained products are composed of cobalt methatitanate CoTiO 3 or cobalt orthotitanate Co 2 TiO 4 occurring as single phases, and also as cobalt titanates and titanium dioxide phase mixtures. The proposed method of proceeding can be used for the preparation of series of transition metals titanates, such as nickel, iron, zinc, copper and also aluminium titanates.

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Structural analysis of cobalt titanate nanoparticles obtained by sol?gel process

Cited by 21 publications

References 27 publications

Cobalt titanate–cobalt oxide composite thin films deposited from heterobimetallic precursor

Cobalt titanate–cobalt oxide composite thin films deposited from heterobimetallic precursor

CoTiO3 via cobalt oxalate–TiO2 precursor. Synthesis and characterization

Preparation of cobalt titanates via co-precipitation while using industrial intermediates as titanium precursors

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