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Author: search.filters.author.Buarod, EumpornSubject: search.filters.subject.Synthesis

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    Facile synthesis and characterization of tenorite nanoparticles from gas-atomized Cu powder
    (2015-01-01)
    Buarod, Eumporn
    ;
    Pithakratanayothin, Sakollapath
    ;
    Naknaka, Suchuta
    ;
    Chaiyasith, Pachernchaiyapat
    ;
    Yotkaew, Thanyaporn
    CuO powder is widely used because of its high activity and selectivity in oxidation/reduction reactions. CuO nanoparticles are interesting because of their high ratio of surface area to mass, which is expected to enhance the catalytic performance of a material. Because of such importance, CuO nanoparticles were prepared by two different facile routes. The first involved the reaction of pure Cu powder with nitric acid to form Cu(NO<inf>3</inf>)<inf>2</inf> intermediate. In the second route, glacial acetic acid was employed to react with pure Cu powder to form Cu(CH<inf>3</inf>COO)<inf>2</inf> intermediate. After purification, both intermediates were reacted with NaOH via a solid-state route to form CuO powders. The intermediates and end products were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy and X-ray diffraction technique. Experimental results indicated that synthesis of the CuO nanoparticles via the Cu(NO<inf>3</inf>)<inf>2</inf> intermediate yielded slightly higher product and fine particle sizes with a larger aspect ratio. In contrast, the Cu(CH<inf>3</inf>COO)<inf>2</inf> intermediate route yielded lower product yield and fine particle sizes with a smaller aspect ratio. However, due to the extremely fine particle size it was observed that nanoparticle agglomeration could not be avoided particularly in the CuO nanopowders produced via the Cu(CH<inf>3</inf>COO)<inf>2</inf> intermediate route.