2019, Volume 22, Issue 1
Pages 37-44
Environmentally friendly methods for high quality lanthanum cobaltite perovskite catalysts synthesis
1 National Research and Development Institute for Cryogenics and Isotopic Technologies - ICSI Rm. Valcea, Uzinei Street no. 4, PO Box Râureni 7, 240050, Râmnicu Vâlcea, Romania
2 Academician Evgeni Budevski Institute of Electrochemistry and Energy Systems, Sofia, Bulgaria
*Corresponding authors: Stanica Enache, Mirela Dragan, E-mail: stanica.enache@icsi.ro; mirela.dragan@icsi.ro
Published: 2019
Abstract
In this work, two dry and direct routes for LaCoO3 perovskite synthesis are presented: solid-state synthesis and high-energy ball milling. These synthesis routes are clean and do not make use of materials other than the reaction precursors. The following methods for physical characterization have been applied: X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive electron diffraction (EDS).
The solid-state synthesised powders are polycrystalline within a single-phase, proving that the preparation method is efficient to produce LaCoO3 perovskites. The high-energy ball-milling method produces finer powders. The heat-treatment of these powders leads to high crystalline quality. Both powders have the same stoichiometry.
The developed methods have lower preparation temperatures, simpler synthesis protocols and less expensive precursors, leading to energy and price savings.
References
perovskite powders, solid-state synthesis, high energy ball-milling
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Bulgarian Chemical Communications, 50, Special Issue A, pp. 127-132
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Keywords
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perovskite
powders
solid-state
synthesis
high
energy
ball-milling
