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Sompech, Supachai; Srion, Autcharaporn; Nuntiya, Apinon

doi:10.2306/scienceasia1513-1874.2012.38.102

Cited by 11 publications

(4 citation statements)

References 26 publications

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“…Lanthanum cobaltite (LaCoO 3 ) is one of the most promising catalytic materials that have many practical applications for its excellent physical and chemical properties [1]. This catalyst can be used for combustion, automobile exhaust and waste gas purification.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of High Quality LaCoO3 Crystals Using Water Based Sol-Gel Method

Sarker

2015

IJMSA

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Lanthanum cobaltite (LaCoO 3 ) crystalline material is a promising material for its interesting electrical, magnetic, catalytic and thermoelectric properties. In this study, LaCoO 3 powders were synthesized by water based sol-gel method using metal nitrates as precursors and citric acid as the chelating agent at room temperature. The dried powders were amorphous and their thermal decomposition occurs stepwise upon heating to 400 °C. Pure perovskite-type single phase LaCoO 3 polycrystals are formed after heating at 600 °C. The pallets prepared from calcined powers were sintered at 1200 °C and crystalline pallets were characterized for investigation of electrical, optical and thermoelectric properties. The obtained results revealed that the prepared samples were highly crystalline with large cation ordering. The sol-gel method found to be efficient for much production of a lot of crystalline transition metal oxides at low cost.

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Section: Introductionmentioning

confidence: 99%

Synthesis of High Quality LaCoO3 Crystals Using Water Based Sol-Gel Method

Sarker

2015

IJMSA

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“…For industrial applications, however, the production of large batches of LaCoO3 powders with specific crystalline quality [25], average particle size [26] and even grain shape [27] should be amenable upon demand. For that, one may choose between two distinct fabrication routes: dry processing (e.g., solid-state reaction [28] and ball-milling [29]) and wet synthesis (e.g., combustion [30], sol-gel [31], co-precipitation [32], hydrothermal [33], etc.). Both routes have advantages and disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Electronic Percolation Threshold of Self-Standing Ag-LaCoO3 Porous Electrodes for Practical Applications

et al. 2019

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Perovskite LaCoO 3 materials have various applications, from selective permeable membranes and gas sensing devices to water splitting applications. However, the intrinsic electrical resistivity of the perovskite limits the applicative potential. To overcome that, Ag powder was used with LaCoO 3 to obtain porous composite electrodes with enhanced conductivities. For that, a series of composite Ag-LaCoO 3 powders were prepared into pellets and pre-sintered at various temperatures up to 1000 ∘ C. Their structural properties and morphology were investigated by X-ray diffraction and scanning electron microscopy. The electronic transport of compacted specimens was studied by impedance spectroscopy. The results indicate that the presence of Ag acts as pre-sintering additive to obtain porous electrodes, with porosity values as high as 40% at 50 vol. % Ag. Moreover, the overall electrical resistivity of the composite electrodes varied well over four orders of magnitude. The results are discussed within the generalized Bruggeman theory for effective media comprising arbitrarily shaped metallic and semiconducting inclusions.

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“…These methods often require relatively long reaction times and/or high reaction temperatures. In contrast, mechanochemically assisted synthesis methods that use high-energy milling to prepare a precursor effectively reduce the reaction time and temperature in the synthesis of perovskite-type oxides [22][23][24][25][26][27]. To the best of our knowledge, mechanochemical synthesis of LaNiO3 has not been published to date.…”

Section: Introductionmentioning

confidence: 99%

Mechanochemically assisted synthesis and visible light photocatalytic properties of lanthanum nickel oxide nanoparticles

Iwasaki

Shimamura

Makino

et al. 2016

Optik

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Perovskite-type lanthanum nickel oxide (lanthanum nickelate, LaNiO3) nanoparticles with high photocatalytic activity were synthesized via a mechanochemical route. A high-energy planetary ball mill was employed for mechanochemical preparation of an activated precursor of LaNiO3 via a solid-state reaction of LaCl3, NiCl2, and NaOH. The mechanochemical treatment was performed for 1 h at a revolution speed of the milling pot of 600 rpm. In comparison to an un-milled precursor, a simple mixture of La(OH)3, Ni(OH)2, and NaCl, the activated precursor demonstrated that the mechanochemical treatment contributes to the formation of LaNiO3 at low temperatures. This effect, in turn, leads to reduction of the optical band gap, i.e., enhancement of the visible light photocatalytic activity. Standard characterization techniques confirmed that crystalline round LaNiO3 nanoparticles with a median diameter of 46 nm, a surface area of 23 m 2 /g, and an optical band gap of 1.09 eV were obtained after calcination of the mechanochemically treated precursor at 873 K for 1 h. The visible-light-driven 2 photocatalytic activity was evaluated based on the photodegradation of methyl orange in an aqueous solution. The LaNiO3 catalyst nanoparticles efficiently decomposed methyl orange more than 99% of methyl orange was removed from the solution in 2 h, indicating that the LaNiO3 nanoparticles possess good photocatalytic properties.

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Untitled

Cited by 11 publications

References 26 publications

Synthesis of High Quality LaCoO3 Crystals Using Water Based Sol-Gel Method

Synthesis of High Quality LaCoO3 Crystals Using Water Based Sol-Gel Method

Electronic Percolation Threshold of Self-Standing Ag-LaCoO3 Porous Electrodes for Practical Applications

Mechanochemically assisted synthesis and visible light photocatalytic properties of lanthanum nickel oxide nanoparticles

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