Journal
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
Volume 23, Issue 12, Pages 4342-4349Publisher
SPRINGER
DOI: 10.1007/s11665-014-1241-z
Keywords
Cu-doped Bi2WO6; Langmuir-Hinshelwood kinetic model; phenol; photocatalysis; photodegradation
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Funding
- National Natural Science Foundation of China [21406188]
- Industrial Public Relation Project of Department of Science & Technology of Shaanxi [2014K10-04]
- Natural Science Foundation of Shaanxi Provincial Education Office [2013JK0689]
- Industrial Public Relation Project of Science & Technology Bureau of Yan'an City [2012 kg-09]
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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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