Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 21, Issue 12, Pages 4217-4221Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0jm03500a
Keywords
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Funding
- NSFC [21073240, 20603048, 20873184, 90923008]
- Guangdong Province [2008B010600040, 9251027501000002]
- Fundamental Research Funds for the Central Universities [11lgzd14]
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Core/shell nanostructures often exhibit novel physical and chemical properties. Herein ZnO@MoO3 core/shell nanocables have been synthesized in large quantities by a simple electrochemical method at room temperature and the shell thickness of MoO3 can be controlled by changing the deposition time. The synthesized core/shell nanocables were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The inner ZnO nanorod shows a single-crystal structure and has preferential growth in the [0001] direction. The MoO3 shell also shows a single-crystal structure with a [0001] direction. The prepared ZnO@MoO3 core/shell nanocables have been successfully employed as supercapacitor electrodes and give a specific capacitance of 236 F g(-1) at scan rate of 5 mV s(-1), which is much larger than that of MoO3 nanoparticles. In addition, ZnO@MoO3 core/shell nanocables show high electrochemical stability and can withstand over 1000 cycles with no obvious decrease in the specific capacitance.
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