Journal
MATERIALS RESEARCH EXPRESS
Volume 3, Issue 9, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2053-1591/3/9/095021
Keywords
copper cobaltite; specific capacitance; ferromagnetism; spinel
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Nanocrystalline CuCo2O4 spinel structure was prepared by a facile one-step route without any surfactant. The materials physio-chemical properties were systematically investigated with different analytical methods. It is observed that the spinel type CuCo2O4 nanoparticles showed interesting multi-functional features for both optical and electrochemical applications. Typical x-ray diffraction pattern indicates the growth of well-crystalline CuCo2O4 nanoparticles with a cubic spinel structure. From the transmission electron microscope images, a uniform particle distribution with an average size of similar to 20 nm can be seen. UV-visible spectrum shows the absorption maximum at 264.5 nm and exhibits an optical band gap 4.02 eV. Electrochemical analysis further reveals the pseudo-capacitive behaviour with the specific capacitance of 290 F g(-1) at 2mA cm(-2). In addition, the magnetic study of CuCo2O4 substantiates the presence of room temperature weak ferromagnetic ordering at low magnetic field strength.
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