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Synthesis of Co3O4/WO3 Nanoheterojunction Photocatalyst for the Decomposition of Organic Pollutants Under Visible Light Irradiation

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Abstract

A highly efficient and visible light (λ ≥ 420 nm) responsive nanocomposite photocatalyst Co3O4/WO3 was developed by dispersing p-type semiconductor Co3O4 on the surface of n-type semiconductor WO3. The heterojunction Co3O4/WO3 demonstrated higher photocatalytic activity than WO3, Co3O4 and TiO2 nanoparticles for the complete decomposition of 2-propanol in gas phase and phenol in aqueous phase and evolution of CO2 under visible light irradiation. The highest photocatalytic efficiency of the composite Co3O4/WO3 was observed when calcined at 300 °C for 2 h with 4.91 mol% Co3O4/WO3. The enhanced photocatalytic efficiency of the heterojunction was discussed based on the unique relative energy band positions and profound absorption of visible light by the semiconductors.

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Acknowledgments

The authors gratefully acknowledge the Department of Applied Chemistry and Chemical Technology, Islamic University, Kushtia, Bangladesh and Evonik Degussa GmbH for Degussa P25.

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Authors and Affiliations

  1. Department of Applied Chemistry and Chemical Technology, Islamic University, Kushtia, 7003, Bangladesh

    Ashok Kumar Chakraborty, Mst. Shanjeda Akter, M. Ahsanul Haque, G. M. Arifuzzaman Khan & M. Shamsul Alam

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  1. Ashok Kumar Chakraborty
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  2. Mst. Shanjeda Akter
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  3. M. Ahsanul Haque
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  4. G. M. Arifuzzaman Khan
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  5. M. Shamsul Alam
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Correspondence to Ashok Kumar Chakraborty.

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Chakraborty, A.K., Shanjeda Akter, M., Ahsanul Haque, M. et al. Synthesis of Co3O4/WO3 Nanoheterojunction Photocatalyst for the Decomposition of Organic Pollutants Under Visible Light Irradiation. J Clust Sci 24, 701–713 (2013). https://doi.org/10.1007/s10876-013-0559-2

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  • DOI: https://doi.org/10.1007/s10876-013-0559-2

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