Hydrothermal Synthesis and Optical, Magnetic, and Supercapacitance Properties of Nanoporous Cobalt Oxide Nanorods

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• 作者：Guoxiu Wang*^† ; ; Xiaoping Shen^† ; ^‡ ; ; Josip Horvat^† ; ; Bei Wang^† ; ; Hao Liu^† ; ; David Wexler^† ;
• 刊名：Journal of Physical Chemistry C
• 出版年：2009
• 出版时间：March 19, 2009
• 年：2009
• 卷：113
• 期：11
• 页码：4357-4361
• 全文大小：221K
• 年卷期：v.113,no.11(March 19, 2009)
• ISSN：1932-7455

文摘

Nanoporous cobalt oxide nanorods were synthesized by a hydrothermal method. Transmission electron microscopy analysis showed that the individual Co₃O₄ nanorods have a nanoporous structure, consisting of the textured aggregations of nanocrystals. Optical properties of Co₃O₄ nanorods were characterized by Raman and UV−vis spectroscopy. Magnetic property measurement shows that Co₃O₄ nanorods have a low Nel transition temperature of 35 K. We observed quite significant exchange bias for nanoporous Co₃O₄ nanorods, indicating the existence of magnetic coupling between the nanocrystals in Co₃O₄ nanorods. When applied as electrode materials in supercapacitors, Co₃O₄ demonstrated a high capacitance of 280 F/g.