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3D Hierarchical Microspheres of Cu-Doped Bi2WO6: Synthesis, Characterization, and Enhanced Photocatalytic Activity

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Abstract

3D hierarchical microspheres of Cu-loaded Bi2WO6 are successfully prepared by the hydrothermal synthesis method on a large scale. The as-prepared samples are characterized by UV-Vis DRS, BET, XRD, XPS, and SEM. The results reveal that the light absorption of Cu-loaded Bi2WO6 has higher intensity in the visible range and a bathochromic shift of the absorption edge compared to that of pure Bi2WO6. The photocatalytic activity is evaluated by phenol removal from aqueous solution under visible-light irradiation. The results demonstrate that loaded Cu significantly enhances the photocatalytic activity of Bi2WO6, for the loaded Cu acts as the electron receptor on the surface of Bi2WO6, and inhibits the recombination of photogenerated electron-hole. The content of loaded Cu has an impact on the catalytic activity, and the 1.0 wt.% Cu-loaded Bi2WO6 exhibits the best photocatalytic activity in the degradation of phenol. Furthermore, the reaction kinetics of phenol removal from aqueous solution over the Cu-loaded Bi2WO6 is established by the way of the Langmuir-Hinshelwood model. The results indicate that the process of photodegradation of phenol on Cu-loaded Bi2WO6 match the Langmuir-Hinshelwood kinetic model.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant No. 21406188), and the Industrial Public Relation Project of Department of Science & Technology of Shaanxi (Grant No. 2014K10-04). This work was also financially supported by the Natural Science Foundation of Shaanxi Provincial Education Office (Grant No. 2013JK0689), and Industrial Public Relation Project of Science & Technology Bureau of Yan’an City (Grant No. 2012 kg-09).

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Authors and Affiliations

  1. Department of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan’an University, Yan’an, 716000, Shaanxi, China

    Xiaoming Gao & Feng Fu

  2. Department of Chemical Engineering, Northwest University, Xi’an, 710069, Shaanxi, China

    Wenhong Li

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  1. Xiaoming Gao
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Correspondence to Xiaoming Gao.

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Gao, X., Fu, F. & Li, W. 3D Hierarchical Microspheres of Cu-Doped Bi2WO6: Synthesis, Characterization, and Enhanced Photocatalytic Activity. J. of Materi Eng and Perform 23, 4342–4349 (2014). https://doi.org/10.1007/s11665-014-1241-z

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  • DOI: https://doi.org/10.1007/s11665-014-1241-z

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