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Issue 38, 2015
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Highly efficient photocatalytic degradation of organic dyes by Cu doped ZnO nanostructures

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Abstract

Copper doped ZnO nanostructures have been synthesized by a facile wet chemical method. Structural properties of as-synthesized nanomaterials have been studied by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) with energy dispersive X-ray spectroscopy, while UV-visible absorption spectroscopy and Raman spectroscopy have been used to study their optical properties. Sunlight driven photocatalytic degradation of methylene blue (MB) and methyl orange (MO) dyes in water was used to evaluate the photocatalytic activities of Cu doped ZnO nanostructures using UV-visible absorption spectroscopy. The results showed that there is an optimum Cu doping level which leads to the highly enhanced photocatalytic activity of Cu doped ZnO nanostructures, as compared to pure ZnO nanostructures. A mechanism for the enhanced photocatalytic activity of Cu–ZnO nanostructures is tentatively proposed. The enhanced photocatalytic activity of Cu–ZnO nanostructures is attributed to the combined effects of improved separation of photogenerated charge carriers due to optimal Cu doping in ZnO nanostructures and the formation of ZnO–CuO nanoheterojunctions.

Graphical abstract: Highly efficient photocatalytic degradation of organic dyes by Cu doped ZnO nanostructures

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Publication details

The article was received on 23 Mar 2015, accepted on 27 Aug 2015 and first published on 02 Sep 2015


Article type: Paper
DOI: 10.1039/C5CP01681A
Citation: Phys. Chem. Chem. Phys., 2015,17, 25172-25181
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    Highly efficient photocatalytic degradation of organic dyes by Cu doped ZnO nanostructures

    S. Kuriakose, B. Satpati and S. Mohapatra, Phys. Chem. Chem. Phys., 2015, 17, 25172
    DOI: 10.1039/C5CP01681A

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