Preparation of Porous LaFeO<sub>3</sub>Nanowires using AAO Template and Their Catalytic Properties

Ryu, Kwang Hyeon; Im, Ji Eun; Wang, Kang Kyun; Heo, Eil; Lee, Sung Han; Kim, Yong Rok

doi:10.5012/bkcs.2011.32.7.2457

Cited by 5 publications

(1 citation statement)

References 19 publications

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“…The ionic and electronic defects are seen to govern the properties of functional ceramics [7][8] . Several chemical methods have been used to synthesize lanthanum orthoferrite such as polymerizable complex route 9,10 , electro spinning technique 11,12 , sol-gel 13 , auto combustion route 14 , sonochemical synthesis 15,16 , solid state reaction 17 , combustion 18 etc. However, these methods of synthesis require heat treatment with chelating agent and complex solutions to yield pure products.…”

Section: Introductionmentioning

confidence: 99%

Microwave Combustion Synthesis of Silver Doped Lanthanum Ferrite Magnetic Nanoparticles

Desai¹,

Athawale²

2013

DSJ

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ExpErImEntal dEtaIlsAll the chemicals used were of A.R. grade. The salt precursors i.e. lanthanum nitrate (La(NO 3 ) 3 .6H 2 O) and ferric nitrate (Fe(NO 3 ) 3 .9H 2 O) and glycine (NH 2 CH 2 COOH) as a fuel were from Loba Chemie, India, while silver nitrate (AgNO 3 ) was from Qualigens, India. Lanthanum ferrite (LaFeO 3 ) was synthesized by initially mixing the precursor salts together in stoichiometric amounts i.e. 1:1 equimolar ratio (0.08 M each) followed by addition of glycine as fuel (0.26 M). To this, were added ~50 ml of double distilled water. The stoichiometric composition of the mixture was calculated based on oxidizing valency of metal nitrates and reducing valency of glycine 19 . Silver doped samples both at A (La) site and B (Fe) site i.e. La (1-x) Ag x FeO 3 and LaFe (1-x) Ag x O 3 were prepared by partial substitution of host atoms (La and Fe) by varying the concentration of added silver (x = 0.25, 0.50, and 0.75). The resulting mixtures (for undoped and doped perovskites) were stirred for few minutes at room temperature and subjected to evaporation on a hot plate so as to obtain a gel. The gels were subjected to microwave power (0.1-0.9 kW) using a domestic microwave oven (MG-555F Model) for auto combustion and the resulting products were cooled to room temperature. Pure phase products both, for pure and silver doped samples were obtained at 0.42 kW microwave power. During synthesis, the microwave combustion synthesis of silver doped lanthanum Ferrite magnetic nanoparticles ) and silver doped LaFeO 3 powders were synthesized by a single step microwave combustion route using nitrates as precursors and glycine as a fuel. XRD analysis indicated the formation of cubic phase with the dopant peaks at 2θ values of 38.3°, 44.1°, and 64.4° apart from the peaks corresponding to LaFeO 3 . As observed from the transmission electron micrographs, LaFeO 3 exhibits particles with a larger size (mean size ~57 nm), significant decrease in particle size is observed for silver doped samples. The magnetic measurements reveal weak ferromagnetic nature of LaFeO 3 , while silver doped samples are ferromagnetic in nature. Lanthanum silver ferrite (x = 0.25, A site) shows maximum coercivity (Hci = 480.96 G) with hysteresis loop at room temperature which is a clear sign of ferromagnetic ordering. The S shape of the curve implies the presence of domain wall movements in nanoparticles. Thermogravimetric analysis of the samples show stable behavior of the products.

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Section: Introductionmentioning

confidence: 99%

Microwave Combustion Synthesis of Silver Doped Lanthanum Ferrite Magnetic Nanoparticles

Desai¹,

Athawale²

2013

DSJ

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Mesoporous TiO2-rutile supported MnxOy-Na2WO4: Preparation, characterization and catalytic performance in the oxidative coupling of methane

Yıldız

2019

Journal of Industrial and Engineering Chemistry

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The heterostructured AAO/CeO2 nanosystem fabricated by electrodeposition for charge storage and hydrophobicity

Fan

Wang

et al. 2013

Materials Science and Engineering: B

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Preparation of Porous LaFeO₃Nanowires using AAO Template and Their Catalytic Properties

Cited by 5 publications

References 19 publications

Microwave Combustion Synthesis of Silver Doped Lanthanum Ferrite Magnetic Nanoparticles

Microwave Combustion Synthesis of Silver Doped Lanthanum Ferrite Magnetic Nanoparticles

Mesoporous TiO2-rutile supported MnxOy-Na2WO4: Preparation, characterization and catalytic performance in the oxidative coupling of methane

The heterostructured AAO/CeO2 nanosystem fabricated by electrodeposition for charge storage and hydrophobicity

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Preparation of Porous LaFeO3Nanowires using AAO Template and Their Catalytic Properties

Cited by 5 publications

References 19 publications

Microwave Combustion Synthesis of Silver Doped Lanthanum Ferrite Magnetic Nanoparticles

Microwave Combustion Synthesis of Silver Doped Lanthanum Ferrite Magnetic Nanoparticles

Mesoporous TiO2-rutile supported MnxOy-Na2WO4: Preparation, characterization and catalytic performance in the oxidative coupling of methane

The heterostructured AAO/CeO2 nanosystem fabricated by electrodeposition for charge storage and hydrophobicity

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Preparation of Porous LaFeO₃Nanowires using AAO Template and Their Catalytic Properties