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Photocatalytic degradation of acid orange 7 using Cr-doped CeO2 nanorods

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Abstract

Cr-doped CeO2 nanorods were prepared by a co-precipitation method using cerium and chromium nitrates with ammonia solution as the precipitator. The morphology and structure of the synthesized products were characterized by field emission scanning electron microscope, X-ray diffraction, and transmission electron microscopy. The specific surface area of the Cr-doped CeO2 nanorods (455 m2 g−1) is higher than those of CeO2 nanoparticles (52 m2 g−1). X-ray photoemission spectroscopy spectrum confirms the presence of Cr in CeO2 nanorods. UV–Vis spectra analyzes showed that the Cr-doped CeO2 nanorods exhibit the absorption band in the visible region. The synthesized products exhibited good photocatalytic activity for the degradation of acid orange 7 under UV–visible light illumination and the pseudo-first order reaction rate constant (k) of 0.250 h−1 for Cr-doped CeO2 nanorods is higher than 0.142 h−1 of CeO2 nanoparticles.

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Acknowledgments

One of the authors NSA would like to thank Bharathiar University for providing University Research Fellowship. Also, this work was supported by the Technology Innovation Program (10041957, Design and Development of fibre-based flexible display) funded by the Ministry of Trade, Industry and Energy (MI, Korea) and Civil-Military Technology Cooperation Center (13-DU-EE-13).

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Authors and Affiliations

  1. Department of Chemical and Biochemical Engineering, Dongguk University-Seoul, Seoul, 100715, South Korea

    Narayanasamy Sabari Arul & Jeong In Han

  2. Department of Nanoscience and Technology, Bharathiar University, Coimbatore, 641046, India

    Devanesan Mangalaraj

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  1. Narayanasamy Sabari Arul
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  2. Devanesan Mangalaraj
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  3. Jeong In Han
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Correspondence to Devanesan Mangalaraj or Jeong In Han.

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Arul, N.S., Mangalaraj, D. & Han, J.I. Photocatalytic degradation of acid orange 7 using Cr-doped CeO2 nanorods. J Mater Sci: Mater Electron 26, 1441–1448 (2015). https://doi.org/10.1007/s10854-014-2559-x

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  • DOI: https://doi.org/10.1007/s10854-014-2559-x

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