Synthesis and X-ray structural characterization of NiO nanoparticles obtained through gelatin

Maia, Ana Jeniffer Rebouças; Meneses, C.T.; Menezes, A.S. de; Flores, Wladimir Hernandez; Melo, D.M.A.; Sasaki, J. M.

doi:10.1016/j.jnoncrysol.2006.03.103

Cited by 35 publications

(21 citation statements)

References 23 publications

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“…10 Some researchers have used a synthetic route similar to the polymeric precursor method in which the gelatin replaces the ethylene glycol as the polymerizing agent to obtain nanoparticles. [11][12][13] This method consists in the formation of a metal-chelate complex system, including a chelating agent and a metal precursor, replacing the ethylene glycol and the citric acid or EDTA (ethylenediaminetetraacetic acid) by gelatin. The method is distinguished by its simplicity and ability to obtain crystalline materials with high purity and good control of stoichiometry.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of LaNiO3 perovskite by the modified proteic gel method and study of catalytic properties in the syngas production

Santos¹,

Souza²,

Ruiz³

et al. 2012

J. Braz. Chem. Soc.

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Este trabalho descreve um estudo sobre a síntese da perovsquita LaNiO 3 via método do gel proteico, variando quantidade de colágeno e sobre a atividade catalítica de LaNiO 3 e LaNiO 3 /Al 2 O 3 na produção de gás de síntese (CO + H 2 ). Os padrões de difração de raios X revelaram a formação da estrutura perovsquita em todas as amostras preparadas pelo método de síntese do gel protéico, variando a quantidade de colágeno e após calcinações a 700 ºC por 2 h. O catalisador LaNiO 3 /Al 2 O 3 preparado pelo método de impregnação mostrou picos de difração nos difratogramas atribuídos a LaNiO 3 e ao suporte (Al 2 O 3 ). Este catalisador apresentou: área superficial específica de 46,1 m 2 g -1 , dois picos de redução no perfil de redução à temperatura programada (RTP) e 46% de conversão do metano (através da oxidação parcial do metano utilizando oxigênio) depois de 18 h de reação.This work describes a study on the synthesis of LaNiO 3 perovskites via the modified proteic gel method, varying collagen content and on the catalytic activity of LaNiO 3 and LaNiO 3 /Al 2 O 3 in the syngas (CO + H 2 ) production. X-ray diffraction patterns revealed the formation of perovskite structure in all samples prepared by proteic gel synthesis method, varying collagen content and after calcinations at 700 ºC for 2 h. LaNiO 3 /Al 2 O 3 catalyst prepared by the impregnation method showed diffraction peaks due to the perovskite structure and to the support (Al 2 O 3 ). This catalyst presented: specific surface of 46.1 m 2 g -1 , two reduction peaks in the temperature programmed reduction (TPR) profile and 46% of methane conversion (by the partial oxidation of methane using oxygen) after 18 h of reaction.Keywords: LaNiO 3 perovskites, collagen, syngas production, partial oxidation of methane IntroductionPerovskite mixed oxides are ceramic materials that combine metal elements with non-metallic ones, usually with the general formula ABO 3 , where A represents a lanthanide or alkaline earth ion and B a trivalent ion of a transition metal. 1 LaNiO 3 perovskite oxides have been widely investigated among the rare earth perovskites containing Ni +3 . Nickel usually adopts a formal charge of Ni 2+ but can (in rare earth or alkaline earth ternary metal oxides) form 3+ ions. 2 These materials can be considered extremely important due to their electronic, optic and catalytic properties, among others. [1][2][3][4][5] In recent decades, many routes have been used for preparing mixed oxides with the perovskite structure such as the conventional ceramic powder technology, the Pechini process, the chelating precursor method, the proteic sol gel process and the combustion synthesis, among others. [5][6][7][8][9] In general, these methods aim at obtaining a material with high homogeneity, low amount of impurities, and phase, particle size and surface area suitable for different applications. [5][6][7][8] The effects of the routes of preparation and calcination Santos et al. 1859 Vol. 23, No. 10, 2012 temperature on the phase composition and crystalline st...

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Section: Introductionmentioning

confidence: 99%

Synthesis of LaNiO3 perovskite by the modified proteic gel method and study of catalytic properties in the syngas production

Santos¹,

Souza²,

Ruiz³

et al. 2012

J. Braz. Chem. Soc.

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show abstract

“…Recently, simple oxides as Cr 2 O 3 , NiO, and a-Fe 2 O 3 were obtained by a chemical route where inorganic salts are mixed with gelatin and reacted at low temperature and for a short time [7][8][9]. The oxides prepared through this method exhibited crystallites with average size of 15 nm.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of NiMn2O4 nanoparticles using gelatin as organic precursor

Almeida

Meneses

Menezes

et al. 2008

Journal of Magnetism and Magnetic Materials

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“…An alternative method for preparing nanoparticles with particle sizes of order of nanometers using low annealing temperatures has been developed using commercial gelatin as a polymerizing agent. This method has been named by the authors as soft chemical route (Medeiros et al, 2004;Maia et al, 2006). preparation of LSM-SDC films from powders synthesized using commercial gelatin have been encountered.…”

Section: Lanthanum Manganite and Cobaltite Based Cathodesmentioning

confidence: 99%

Infrared Spectroscopy Techniques in the Characterization of SOFC Functional Ceramics

Macedo¹,

Cesário²,

Souza³

et al. 2012

Infrared Spectroscopy - Materials Science, Engineering and Technology

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Synthesis and X-ray structural characterization of NiO nanoparticles obtained through gelatin

Cited by 35 publications

References 23 publications

Synthesis of LaNiO3 perovskite by the modified proteic gel method and study of catalytic properties in the syngas production

Synthesis of LaNiO3 perovskite by the modified proteic gel method and study of catalytic properties in the syngas production

Synthesis and characterization of NiMn2O4 nanoparticles using gelatin as organic precursor

Infrared Spectroscopy Techniques in the Characterization of SOFC Functional Ceramics

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