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Synthesis and Characterization of MoO3 Nano Particle by Controlling Various Growth Conditions in Solution Combustion Method

Kwon Namhun, Lee Seyoung, Roh Jaeseok, Lee Kun-Jae

Archives of Metallurgy and Materials

2021

Vol. 66, iss. 4

991--995

In this paper, synthesize MoO3 particles with various particle properties by control growth influence factors was mainly studied. The experimental conditions were established in molar ratio of Mo:urea and ph levels. The plate-type of MoO3 particles were formed without proceeding any established conditions, but the rod-shape particles were formed by adjusting molar ratio of mo:urea. Also, different ranges of the particle size were formed by adjusting experimental conditions. Through the results, it was confirmed that particles with a size in the range of 300 ~ 400 nm were obtained by adjusting precursor concentration and the micrometer size of particles were formed by increase ph levels. The properties of the particles formed accordingly by setting various factors that can affect the growth process of MoO3 particle was analyzed as variables and the particle growth behavior was also observed.

Impact of heating rate and solvent on Ni-based catalysts prepared by solution combustion method for syngas methanation

Zeng Yan, Ma Hongfang, Zhang Haitao, Ying Weiyong, Fang Dingye

Polish Journal of Chemical Technology

2014

Vol. 16, nr 4

95--100

Ni-Al2O3 catalysts prepared by solution combustion method for syngas methanation were enhanced by employing various heating rate and different solvent. The catalytic properties were tested in syngas methanation. The result indicates that both of heating rate and solvent remarkably affect Ni particle size, which is a key factor to the catalytic activity of Ni-Al2O3 catalysts for syngas methanation. Moreover, the relationship between Ni particle size and the production rate of methane per unit mass was correlated. The optimal Ni-Al2O3 catalyst prepared in ethanol at 2°C/min, achieves a maximum production rate of methane at the mean size of 20.8 nm.

Ferroelectric and dielectric properties of nanocrystalline BiFeO3 multiferroic ceramics synthesized by solution combustion method (SCM)

Chaudhari Y. A., Mahajan C. M., Abuassaj E. M., Jagtap P. P., Patil P. B., Bendre S. T.

Materials Science Poland

2013

Vol. 31, No. 2

221--225

Nanocrystalline multiferroic BiFeO3 ceramics was prepared by a novel solution combustion method (SCM). The X-ray diffraction (XRD) studies on structural properties of the synthesized ceramics reveal that the BiFeO3 ceramics has rhombhohedral perovskite structure with an average crystallite size of 15 nm. The ferroelectric P-E hysteresis loop measurement at room temperature shows unsaturated behavior with a partial reversal of polarization. Investigations on temperature dependence of dielectric constant in BiFeO3 demonstrate a clear dielectric anomaly at approximately around 380 C, which corresponds to antiferromagnetic to paramagnetic phase transition (TN) and also evidences a possible coupling among the electric and magnetic dipoles of BiFeO3. A room temperature variation of dielectric constant “e” and dielectric loss “tan d” as a function of frequency in the range of 100 Hz – 1 MHz, confirms that both dielectric constant and loss are strong functions of frequency.