Synthesis of high surface area LaMnO3+ by a polymerizable complex method

Kakihana, Masato; Arima, Momoko; Yoshimura, Masahiro; Ikeda, Nobuyuki; Sugitani, Yoshinori

doi:10.1016/s0925-8388(98)00865-2

Cited by 86 publications

(54 citation statements)

References 14 publications

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“…Accounting for the observation in [11] regarding the hydrolysis reported to take place at a temperature above 90…”

Section: Synthesis Composition and Ir Spectra Of The Complexesmentioning

confidence: 99%

“…The synthesis of a single-phase product is often difficult and usually the particles of the final product are inhomogeneous in shape and size. Because of this, numerous methods for low-temperature synthesis have been proposed [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Coprecipitation of the metal nitrates solutions with aqueous ammonium carbonate is used in [5].…”

Section: Introductionmentioning

confidence: 99%

“…Some spectral characteristics and the thermochemical behavior of the gel are studied and the characteristics of the final product are compared with the ones for the same product synthesized by solid-state reaction. In [11] a similar waterbased route (non-polymerizable, called amorphous citrate route by the authors) and a Pechini-type method are used for the synthesis of undoped LaMnO 3+d . It is reported that the amorphous citrate route always suffers from formation of precipitates during the evaporation of the water, thus creating risks of phase separation and heterogeneity already during the gel formation process.…”

Section: Introductionmentioning

confidence: 99%

“…The application of the method for synthesis of pure LaMnO 3+d and the characteristics of the final powders are studied by the group of Kakihana [11][12][13][14]. Sr-doped powders are synthesized in [15].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of Mn-, La-Mn- and La-Ca-Mn-citrates as precursors for LaMnO3 and La1−xCaxMnO3

Petrova

Todorovsky

Vasileva³

2005

Open Chemistry

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Mn-, LaMn-and LaCaMn-citrates were synthesized at 60-120 • C in ethylene glycol medium using chlorides or nitrates as metal sources. Their composition, IR spectra and thermal decomposition were studied. Equimolar La/Mn ratio has been established in the complex, prepared from chloride solution with the same initial composition of the metals. In the isolated three-metallic complex the molar ratio of the metals deviates from the composition in the initial solution. The final products of the heating of Mn-and mixed-metal LaMn-citrates at 1000 • C are phase-homogeneous Mn 3 O 4 (hausmannite) and LaMnO 3 respectively. Parasitic phase(s) are observed in La x Ca 1−x Mn y O 3 , produced from LaCaMn-citrate.

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“…Accounting for the observation in [11] regarding the hydrolysis reported to take place at a temperature above 90…”

Section: Synthesis Composition and Ir Spectra Of The Complexesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis and characterization of Mn-, La-Mn- and La-Ca-Mn-citrates as precursors for LaMnO3 and La1−xCaxMnO3

Petrova

Todorovsky

Vasileva³

2005

Open Chemistry

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“…These routes include the polymeric precursor route or the Pechini method [21][22][23] , which stands out for its enhanced stoichiometric control, allowing for doping in a ppm order of magnitude, with good composition homogeneity, depending on the system's composition. This method also allows one to obtain relatively high specific surface area powders when compared with other traditional solid state reaction methods [24][25][26] . The key point of this route is to obtain a polymeric precursor resin, a branched chain polymer, in which the cations are distributed randomly.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of La1-xSr xMnO3±δ powders obtained by the polymeric precursor route

et al. 2011

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Polycrystalline strontium-doped lanthanum manganite (LSM) powders with 0.15, 0.22, and 0.30 mol % Sr were synthesized by the polymeric precursor route using a molar ratio of 3:1 citric acid and metal cations. The powders were characterized by Fourier transform infrared spectroscopy, thermal analysis, high-temperature X-ray diffraction to determine the crystalline perovskite phase and crystallite sizes, scanning electron microscopy for the morphological analysis, nitrogen adsorption to determine the specific surface area, and laser scattering to evaluate the particle size distribution. The LSM perovskite-type oxides containing intermediate 0.22 mol % Sr were found to exhibit a tendency to decrease in crystallite size and increase in specific surface area and, when calcined at 700-900 °C exhibited a pure phase of perovskite, had a crystallite size of about 17-20 nm and a specific surface area for 900 °C of 34.3 m 2 .g -1.

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Mass Production of Large‐Sized, Nonlayered 2D Nanosheets: Their Directed Synthesis by a Rapid “Gel‐Blowing” Strategy, and Applications in Li/Na Storage and Catalysis

et al. 2018

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2D nanomaterials are well suited for energy conversion and storage because of their thickness-dependent physical and chemical properties. However, current synthetic methods for translating 2D materials from the laboratory to industry cannot integrate both advantages of liquid-phase method (i.e., solution processibility, homogeneity, and massive production), and gas-phase method (i.e., high quality and large lateral size). Here, inspired by Chinese Sugar Figure Blowing Art, a rapid "gel-blowing" strategy is proposed for the mass production of 2D nonlayered nanosheets by thermally expanding the viscous gel precursors within a short time (≈1 min). A wide variety of 2D nanosheets including oxides, carbon, oxides/carbon and metal/carbon composites are synthesized on a large scale and with no impurities. Importantly, this method unifies the merits of both liquid-phase and gas-phase syntheses, giving rise to 2D products with high uniformity, nanometer thickness, and large lateral sizes (up to hundreds of micrometers) simultaneously. The success of this strategy highly relies on the speed of "blowing" and control of the amount of reactants. The as-synthesized nanosheet electrodes manifest excellent electrochemical performance for alkali-ion batteries and electrocatalysis. This method opens up a new avenue for economical and massive preparation of good-quality nonlayered 2D nanosheets for energy-related applications and beyond.

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Synthesis of high surface area LaMnO3+ by a polymerizable complex method

Cited by 86 publications

References 14 publications

Synthesis and characterization of Mn-, La-Mn- and La-Ca-Mn-citrates as precursors for LaMnO3 and La1−xCaxMnO3

Synthesis and characterization of Mn-, La-Mn- and La-Ca-Mn-citrates as precursors for LaMnO3 and La1−xCaxMnO3

Synthesis and characterization of La1-xSr xMnO3±δ powders obtained by the polymeric precursor route

Mass Production of Large‐Sized, Nonlayered 2D Nanosheets: Their Directed Synthesis by a Rapid “Gel‐Blowing” Strategy, and Applications in Li/Na Storage and Catalysis

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