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Construction of CuO/In2S3/ZnO heterostructure arrays for enhanced photocatalytic efficiency

Abstract

Novel one-dimensional (1D) heterostructure arrays composed of CuO nanowire cores, intermediate In2S3 nanostructures, and ZnO nanorod sheaths (i.e. CuO/In2S3/ZnO heterostructure arrays) have been successfully synthesized by a multi-step process. First, single-crystalline CuO nanowires have been directly grown on the flexible Cu mesh substrates by using a one-step annealing process under ambient condition. Second, In2S3 nanostructures and ZnO nanorods have been sequentially grown on the CuO nanowires by a two-step hydrothermal method at low reaction temperature. The morphology, crystal structures, and optical property of CuO/In2S3/ZnO heterostructure arrays were studied by scanning electron microscopy, X-ray diffraction, transmission electron microscopy, energy-dispersive spectroscopy, and photoluminescence spectroscopy. The resultant ternary CuO/In2S3/ZnO heterostructure arrays exhibit excellent photocatalytic activity in the photodegradation of rhodamine 6G (R6G) under 10 W UV light irradiation, which is much higher than single component (CuO nanowire arrays) or two component systems (CuO/In2S3 heterostructure arrays). Furthermore, the reusability test can demonstrate that the CuO/In2S3/ZnO heterostructure arrays on the Cu mesh still maintain high photocatalytic activity for the degradation of three kinds of organic pollutants even after five cycles without any significant decline. These findings provide an insight into designing and synthesizing new CuO-based composites for effectively improving the photocatalytic performance.

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Supplementary files

Publication details

The article was received on 22 May 2017, accepted on 07 Aug 2017 and first published on 09 Aug 2017


Article type: Paper
DOI: 10.1039/C7NR03630B
Citation: Nanoscale, 2017, Accepted Manuscript
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    Construction of CuO/In2S3/ZnO heterostructure arrays for enhanced photocatalytic efficiency

    Y. Chang, J. Guo, C. Chen, H. Di and C. Hsu, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR03630B

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