Characterization and thermal behavior of PrMO3 (M=Co or Ni) ceramic materials obtained from gelatin

Aquino, Flávia de Medeiros; Melo, D. M. A.; Pimentel, Patrícia Mendonça; Braga, Renata Martins; Melo, M. A. F.; Martinelli, Antônio Eduardo; Costa, A. F.

doi:10.1016/j.materresbull.2012.04.078

Cited by 12 publications

(10 citation statements)

References 16 publications

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“…In the region of 1500-1340 cm -1 , bands were observed that can be attributed to the metal coordination by the carboxylate and amine groups of the collagen, since these vibrations are displaced when compared with the collagen spectrum bands (1637-1380 cm -1 ). However, the characteristic bands between 1000-400 cm -1 are related to the possible coordination of the carboxylate groups of the collagen with lanthanum, nickel or strontium [20]. The spectra of the heattreated samples at 900 °C (result not shown) indicated the disappearance of the bands characteristic of the carboxylate groups and the amines present in the collagen.…”

Section: Resultsmentioning

confidence: 95%

Nickel-based perovskite catalysts: synthesis and catalytic tests in the production of syngas

et al. 2018

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La 1-x Sr x NiO 3 (x= 0.0, 0.3 or 0.7) perovskite-type oxides were synthesized using the modified proteic gel method and using collagen as an organic precursor. Catalysts of La 1-x Sr x NiO 3 /Al 2 O 3 were obtained using the wet impregnation method. The synthesized catalysts were characterized by X-ray diffraction, surface area and temperature-programmed reduction. The catalysts were evaluated in the partial oxidation reaction of methane, and the levels of selectivity to CO, CO 2 , H 2 and H 2 O were determined. Among the catalysts studied, the catalyst LaNiO 3 /Al 2 O 3 had the highest methane conversion level (78%) and higher H 2 selectivity (55%). Keywords: La 1-x Sr x NiO 3 , perovskite-type oxides, modified proteic gel method, partial oxidation of methane. Resumo Perovskitas do tipo

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Section: Resultsmentioning

confidence: 95%

Nickel-based perovskite catalysts: synthesis and catalytic tests in the production of syngas

et al. 2018

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“…The micrographs revealed powders with plate-like aggregates with irregular and porous structures. This morphology is typical of powders synthesized using gelatin as a precursor, resulting from the intense release of gases associated with the decomposition of gelatin during the heating process [21,22,24,25]. Fig.…”

Section: Resultsmentioning

confidence: 81%

“…The first stage of weight-loss was associated with the water loss, while the second one was attributed to the elimination of amino acid fragments, usually proline [21]. The last step corresponded to the degradation of glycine [24] and metal nitrates, while above 600 °C no weight-loss occurred. This behavior was due to the interaction of glycine through carboxyl groups and amine with metallic ions, which provided more stability to the structure [25].…”

Section: Resultsmentioning

confidence: 99%

“…The process is an alternative simple, low-cost and environmentally friend method, which produces nano-sized powders with high purity, homogeneity and good control of stoichiometry. Recent studies have used gelatin as a polymerization agent to produce mixed oxides with spinel [21][22][23] and perovskite [24][25][26] structures. Thus, the aim of this work was to synthesize zinc aluminate nanoparticles using gelatin as an organic precursor and to evaluate the effect of different temperatures of calcination on the structural, morphological and textural properties of the materials.…”

Section: Introductionmentioning

confidence: 99%

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Study of ZnAl2O4 spinel nanoparticles synthesized using gelatin as organic precursor

et al. 2019

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In this work, zinc aluminate spinel powders were prepared by a fast, simple, eco-friendly and low-cost modified Pechini method using commercial gelatin as the organic precursor. The materials were calcinated at 600, 700 and 800 °C and characterized by thermogravimetric analysis, in situ and ex situ X-ray diffraction (XRD), N2-adsorption/desorption isotherms and scanning electron microscopy. The results showed that single phase ZnAl2O4 particles with spinel structure were successfully obtained resulting in a high purity, nanometric, homogeneous and mesoporous materials. The in situ XRD results showed that the crystalline spinel structure of ZnAl2O4 started forming at a temperature lower than 600 °C, revealing powders with crystallite size smaller than 40 nm, which increased with increasing the temperature (91% of increase between 600 and 800 °C). The effect of calcination time showed that the materials calcinated at 600 °C for 3 h presented the higher percentage of crystallite growth due to the increase of crystallinity. The ZnAl2O4 samples retained their pore size up to 700 °C.

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“…In recent years, the use of natural gelatin as an organic precursor for the synthesis of mixed oxides with spinel 11 and perovskite [12][13][14] structure has received special attention because it is a low cost, easy to acquire and nontoxic material, as well as it allows to obtain materials with well-defined structure and morphology. In principle, the amino acids present in the natural gelatin interact with the metal ions present in the aqueous solution to form a resin.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of MgAl2O4 by Gelatin Method: Effect of Temperature and Time of Calcination in Crystalline Structure

et al. 2017

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Magnesium aluminate can be obtained by the methods: ceramic method, sol-gel, co-precipitation, hydrothermal and combustion. However, this work presents a simple and low cost route to obtain MgAl 2 O 4 through the gelatin method. The main objective was to use gelatin as an organic precursor and to verify the influence of temperature and time of calcination on the structural and morphological properties of obtained materials. Al and Mg nitrates were used as metal precursors with Al/Mg = 2 ratio. Samples were calcined as follows: 700 ºC, 900 ºC and 1100 ºC during 2 and 4 h. The powders were characterized by TGA, XRD and SEM. A single phase material with a crystallinity of 39.18-90.40% and crystallite size in the range of 12.4 to 55.5 nm was obtained. The materials exhibited morphology in the form of plates and small agglomerates. It was found that increasing temperature and time of calcination favored the growth of crystallites and increased crystallinity.

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Characterization and thermal behavior of PrMO3 (M=Co or Ni) ceramic materials obtained from gelatin

Cited by 12 publications

References 16 publications

Nickel-based perovskite catalysts: synthesis and catalytic tests in the production of syngas

Nickel-based perovskite catalysts: synthesis and catalytic tests in the production of syngas

Study of ZnAl2O4 spinel nanoparticles synthesized using gelatin as organic precursor

Synthesis of MgAl2O4 by Gelatin Method: Effect of Temperature and Time of Calcination in Crystalline Structure

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