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High-Purity Lanthanum Oxide Nanoparticles Synthesized in Iran.

Summary: TEHRAN (FNA)- Iran's chemical engineering researchers discovered a suitable and highly efficient method to produce pure lanthanum oxide nanoparticles.

Lanthanum oxide nanoparticle is used in the production of nanostructures such as lanthanum chromite required for cathodic layer of the solid oxide fuel cells. Besides having applications in water purification, it is one of the most important components of the device that transfers the emitted heat from the vehicles' exhaust pipe."In this research, we used hydrothermal synthesis under the supercritical water condition method in a batch type reactor. This method enables us to properly control the size and shape of the particles," Shahriyar Ja'farinejad, one of the researchers, told INIC."Comparing with other methods, the synthesis time of this method is shorter, and the final product has less impurity," he added.Referring to the phases of the research, Ja'farinejad said, "At first, we built the device to produce nanoparticles by supercritical fluid method. Then we produced lanthanum oxide nanoparticle by using a hydrothermal synthesis method under the supercritical water condition in a batch reactor. Considering the importance of the purity, efficiency, and size of the product, we studied the important parameters affecting the synthesis of lanthanum oxide nanoparticle such as synthesis temperature, time of reaction, and the initial concentration and pH.""In order to produce nanoparticles with high reaction efficiency, high purity, infinitesimal size, and high BET surface area, we increased the temperature and pH of the initial solution, and decreased the initial concentration (despite the possibility of decrease in the reaction efficiency), and we kept the time of the reaction in the average duration," he concluded.

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Publication:FARS News Agency
Date:Jun 14, 2010
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