SnO₂-CoO/carbon-coated CoO core/shell nanowire composites were synthesized by using electrospinning and hydrothermal methods. In order to obtain SnO2-CoO/carbon-coated CoO core/shell nanowire composites, SnO₂-Co₃O₄ nanowire composites and SnO₂-Co₃O₄/polygonal Co₃O₄ core/shell nanowire composites are also synthesized. To demonstrate their structural, chemical bonding, and morphological properties, field-emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy were carried out. These results indicated that the morphologies and structures of the samples were changed from SnO₂-Co₃O₄ nanowires having cylindrical structures to SnO₂-Co₃O₄/Co₃O₄ core/shell nanowires having polygonal structures after a hydrothermal process. At last, SnO₂-CoO/carbon-coated CoO core/shell nanowire composites having irregular and high surface area are formed after carbon coating using a polypyrrole (PPy). Also, there occur phases transformation of cobalt phases from Co₃O₄ to CoO during carbon coating using a PPy under a argon atmosphere.

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  Korean Journal of Materials Research.2015; 25(12): 672~677.     CrossRef
• Synthesis of Perforated Polygonal Cobalt Oxides usinga Carbon Nanofiber Template
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  Journal of Korean Powder Metallurgy Institute.2015; 22(5): 350.     CrossRef