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Novel Visible-Light-Driven Photocatalyst Co3O4/FeWO4 for Efficient Decomposition of Organic Pollutants

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Abstract

A highly efficient and visible light (λ ≥ 420 nm) responsive composite photocatalyst, Co3O4/FeWO4 was prepared by simple impregnation method. The heterojunction semiconductors Co3O4/FeWO4 demonstrated notably high photocatalytic activity over a wide range of composition than the individual component Co3O4 or FeWO4 for the complete degradation of 1,4-dichlorobenzene (DCB) in aqueous phase under visible light irradiation. The photocatalytic activity of composite was optimized at 1/99 Co3O4/FeWO4 composition. After 2 h of visible light irradiation 51% decomposition of 1,4-dichlorobenzene (DCB) was observed utilizing 1/99 Co3O4/FeWO4 photocatalyst while the end members demonstrated a negligible degradation under the same experimental condition. The valence band (VB) and conduction band (CB) of Co3O4 is located above the VB and CB of FeWO4, respectively. Both the semiconductors Co3O4 and FeWO4 exhibit strong absorption over the wide range of visible light. The obviously enhanced photocatalytic performance of Co3O4/FeWO4 composite has been discussed on the hole (h+) as well as electron (e−) transfer mechanism between the VB and CB of individual semiconductors.

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Authors and Affiliations

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

    Ashok Kumar Chakraborty, Md. Rashidul Islam & Md. Helal Uddin

  2. Department of Chemistry, Chittagong University of Engineering and Technology, Chittagong, Bangladesh

    Md. Masudur Rhaman

Authors
  1. Ashok Kumar Chakraborty
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  2. Md. Rashidul Islam
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  3. Md. Helal Uddin
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  4. Md. Masudur Rhaman
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Correspondence to Ashok Kumar Chakraborty.

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Chakraborty, A.K., Islam, M.R., Uddin, M.H. et al. Novel Visible-Light-Driven Photocatalyst Co3O4/FeWO4 for Efficient Decomposition of Organic Pollutants. J Clust Sci 29, 67–74 (2018). https://doi.org/10.1007/s10876-017-1302-1

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