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Author: search.filters.author.Phiwdang, Kankanit

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    Study of antifungal activities of CuO/ZnO nanocomposites synthesized by co-precipitation method
    (2013-10-29)
    Phiwdang, Kankanit
    ;
    Phensaijai, Mongkol
    ;
    Pecharapa, Wisanu
    In this work, series of CuO/ZnO functional nanocomposites were synthesized through co-precipitation method using CuCl<inf>2</inf>·H<inf>2</inf>O and ZnCl<inf>2</inf> as starting materials with various molar ratio of copper:zinc, followed by annealing process at 600°C for 2 hours to obtain CuO/ZnO nanocomposites. The structures of the composites were analyzed using X-ray diffraction and field emission scanning electron microscopy. For XRD result, diffraction peaks of the composites reveal the well-crystalline characteristic indicating the mixture phase of CuO and ZnO. SEM results show different morphologies of CuO, ZnO and Cu-Zn oxide nanocomposites appearing in quasi spherical structure.The composites were used for antifungal activity via agar disk diffusion method. It is found that the composite with certain ratio of Cu:Zn exhibits superiority in partial inhibition of strain AspergillusflavusTrichoderma comparing to either pure CuO or ZnO. © (2013) Trans Tech Publications, Switzerland.
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    Synthesis of CuO nanoparticles by precipitation method using different precursors
    (2013-01-01)
    Phiwdang, Kankanit
    ;
    Suphankij, Sineenart
    ;
    Mekprasart, Wanichaya
    ;
    Pecharapa, Wisanu
    CuO nanoparticles were synthesized by precipitation method using different precursors as copper nitrate (Cu(NO<inf>3</inf>)2) and copper chloride (CuCl2) with post-heating comparing between as-synthesized and after calcinations. Relevant properties of as-synthesized nanoparticles were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier Transform Infrared (FTIR) Spectroscopy. Overall results suggest that the formation of CuO nanostructures with different shape, size and morphology can be achieved using different precursors via this process. The improvement in their crystallinity and purification can be further attained by post calcinations process. © 2013 The Authors.