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

Authors

Guoxiu Wang, University of WollongongFollow
Xiaoping Shen, University of WollongongFollow
Josip Horvat, University of WollongongFollow
Bei Wang, University of WollongongFollow
Hao Liu, University of WollongongFollow
David Wexler, University of WollongongFollow
Jane Yao, University of Wollongong

RIS ID

31518

Publication Details

Wang, G., Shen, X., Horvat, J., Wang, B., Liu, H., Wexler, D. & Yao, J. (2009). Hydrothermal synthesis and optical, magnetic and supercapacitance properties of nanoporous cobalt oxide nanorodes. The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, 113 (11), 4357-4361.

Abstract

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 Néel 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.