4.5 Article

Flower-like cuprous oxide: hydrothermal synthesis, optical, and electrochemical properties

期刊

IONICS
卷 21, 期 2, 页码 477-485

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SPRINGER HEIDELBERG
DOI: 10.1007/s11581-014-1195-z

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X-raymethods; Optical properties; Electrodes

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Flower-like nanocrystalline (Cu2O) was prepared via a hydrothermal process using paraphenylenediamine which acts as a reducing and structure-directing agent. The morphology, the structure, the crystallinity, and the composition were studied through X-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy. It was found that the hydrothermal reaction time had a little effect on the morphology of Cu2O nanocrystals, but influenced the nanocrystal dispersibility. The optical properties of the as-synthesized Cu2O nanomaterials were studied by UV-visible diffuse reflection spectra and room temperature photoluminescence. The values of the band gap for Cu2O nanorods and nanoflowers were found to be 2.43 and 2.34 eV, respectively. A cyclic voltammetric study of the Cu2O nanoflowers revealed a reversible redox behavior with charge-discharge cycling corresponding to the reversible lithium intercalation/deintercalation process in the crystal lattice. Thus, Cu2O is a promising candidate for many applications such as an electrode material for a lithium ion battery.

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