Characterization of metal nitrates and clay supported metal nitrates by thermal analysis

Cseri, T.; Békássy, Sándor; Kenessey, G.; Liptay, G.; Figuéras, F.

doi:10.1016/s0040-6031(96)03037-7

Cited by 67 publications

(37 citation statements)

References 21 publications

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“…The major decomposition of the LSCrM precursor occurred in the temperature range of 150-300 • C, giving rise to a sharp exothermic peak in the DTA curve around 250 • C. The weight loss was 11.37% corresponding to decomposition of nitrate ions and urea. As described in previous studies [24,25], the temperature for the decomposition of Cr(NO 3 ) 3 and Mn(NO 3 ) 2 to Cr 2 O 3 and MnO 2 , respectively, was lower than 200 • C, for La(NO 3 ) 3 and Sr(NO 3 ) 2 the temperatures were about 600 and 700 • C, respectively. The temperature for sharp decomposition of urea was 230 • C [26], and the introduction of urea may reduce the decomposition temperature of these nitrate salts [21].…”

Section: Characterizationsupporting

confidence: 72%

Fabrication and performance of membrane solid oxide fuel cells with La0.75Sr0.25Cr0.5Mn0.5O3−δ impregnated anodes

Zhu

Lü

Wei

et al. 2010

Journal of Power Sources

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Section: Characterizationsupporting

confidence: 72%

Fabrication and performance of membrane solid oxide fuel cells with La0.75Sr0.25Cr0.5Mn0.5O3−δ impregnated anodes

Zhu

Lü

Wei

et al. 2010

Journal of Power Sources

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“…On the basis of the relative position of the out-of-plane reflections, a lattice contraction of ~70% is determined [27,28].…”

Section: Resultsmentioning

confidence: 99%

Block copolymer-templated BiFeO3 nanoarchitectures composed of phase-pure crystallites intermingled with a continuous mesoporosity: Effective visible-light photocatalysts?

et al. 2011

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Herein is reported the soft-templating synthesis of visible-light photoactive bismuth ferrite (BiFeO 3 ) nanoarchitectures in the form of thin films using a poly(ethylene-co-butylene)-block-poly(ethylene oxide) diblock copolymer as the structure-directing agent. We establish that (1) the self-assembled materials employed in this work are highly crystalline after annealing at 550 °C in air and that (2) neither the bismuth-poor Bi 2 Fe 4 O 9 phase nor other impurity phases are formed. We further show that there is a distinct restructuring of the high quality cubic pore network of amorphous BiFeO 3 during crystallization. This restructuring leads to films with a unique architecture that is composed of anisotropic crystallites intermingled with a continuous mesoporosity. While this article focuses on the characterization of these novel materials by electron microscopy, krypton physisorption, grazing incidence small-angle X-ray scattering, time-of-flight secondary ion mass spectrometry, X-ray photoelectron spectroscopy, UV-vis and Raman spectroscopy, we also examine the photocatalytic properties and show the benefits of the combination of mesoporosity and nanocrystallinity. Templated BiFeO 3 thin films (25% porosity) with a direct optical band gap at 2.9 eV exhibit a catalytic activity for the degradation of rhodamine B much better than that of nontemplated samples. We attribute this improvement to the nanoscale porosity, which provides for more available active sites on the photocatalyst.

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“…For Co(N) samples, the signal is composed of one rather small endothermic peaks at around 180°C and has been attributed to nitrate decomposition [15] according to the following reaction:…”

Section: Resultsmentioning

confidence: 99%

Influence of the Ethylenediamine Addition on the Activity, Dispersion and Reducibility of Cobalt Oxide Catalysts Supported over ZrO2 for Complete VOC Oxidation

et al. 2006

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A new and simple method for obtaining highly dispersed Co/ZrO 2 catalyst is described. The presence of ethylenediamine during the preparation of Co/ZrO 2 was studied and compared with a reference catalyst conventionally prepared. Addition of an aqueous solution of ethylenediamine to a cobalt nitrate solution had a dramatic effect on the catalytic performance of the catalyst as compared with a reference catalyst. This promotional effect was explained in terms of higher cobalt dispersion in the catalysts using ethylenediamine. The reason why ethylenediamine improves dispersion of the cobalt species was explained in terms of the size of the stable complex ions which could be formed in situ during impregnation. The best catalytic results were also explained in terms of Co-support interaction since new cobalt species were reducible at lower temperatures.

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Characterization of metal nitrates and clay supported metal nitrates by thermal analysis

Cited by 67 publications

References 21 publications

Fabrication and performance of membrane solid oxide fuel cells with La0.75Sr0.25Cr0.5Mn0.5O3−δ impregnated anodes

Fabrication and performance of membrane solid oxide fuel cells with La0.75Sr0.25Cr0.5Mn0.5O3−δ impregnated anodes

Block copolymer-templated BiFeO3 nanoarchitectures composed of phase-pure crystallites intermingled with a continuous mesoporosity: Effective visible-light photocatalysts?

Influence of the Ethylenediamine Addition on the Activity, Dispersion and Reducibility of Cobalt Oxide Catalysts Supported over ZrO2 for Complete VOC Oxidation

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