Hydrothermal synthesis and optical, magnetic, and supercapacitance properties of nanoporous cobalt oxide nanorods

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Journal Article
Journal of Physical Chemistry C, 2009, 113 (11), pp. 4357 - 4361
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Nanoporous cobalt oxide nanorods were synthesized by a hydrothermal method. Transmission electron microscopy analysis showed that the individual Co3O4nanorods have a nanoporous structure, consisting of the textured aggregations of nanocrystals. Optical properties of Co3O4nanorods were characterized by Raman and UV-vis spectroscopy. Magnetic property measurement shows that Co3O4nanorods have a low Néel transition temperature of 35 K. We observed quite significant exchange bias for nanoporous Co3O4nanorods, indicating the existence of magnetic coupling between the nanocrystals in Co3O4nanorods. When applied as electrode materials in supercapacitors, Co3O4demonstrated a high capacitance of 280 F/g. © 2009 American Chemical Society.
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