- Title
- Facile synthesis of flower-like Ag₃VO₄/Bi₂WO₆ heterojunction with enhanced visible-light photocatalytic activity
- Creator
- Li, Shijie; Hu, Shiwei; Jiang, Wei; Liu, Yu; Liu, Jianshe; Wang, Zhaohui
- Relation
- Journal of Colloid and Interface Science Vol. 501, p. 156-163
- Publisher Link
- http://dx.doi.org/10.1016/j.jcis.2017.04.057
- Publisher
- Academic Press
- Resource Type
- journal article
- Date
- 2017
- Description
- Constructing novel semiconductor heterojunctions is one of the most significant approaches to improving the photocatalytic performance of a photocatalyst. Herein, the Ag₃VO₄/Bi₂WO₆ heterojunction was prepared through in-situ anchoring Ag₃VO₄ nanoparticles (size: ~21 nm) on the surface of Bi₂WO₆ microflowers (diameter: 2.5-4.5 µm) by a facile deposition route. The photocatalytic activity of these heterojunctions were studied by decomposing cationic dye rhodamine B (RhB), anionic dye methyl orange (MO) and neutral para-chlorophenol (4-CP) under visible light irradiation (λ > 400 nm). Among all the tested catalysts, the heterojunction with a Ag₃VO₄/Bi₂WO₆ molar ratio of 0.15/1 displays the maximum activity with the RhB degradation rate constant of up to 0.0392 min-1, a 6.7 or 1.7 times more enhancement compared with the pure Bi₂WO₆ or Ag₃VO₄. It is found that the introduction of Ag₃VO₄ is in favor of suppressing the electron-hole pair recombination of Bi₂WO₆, leading to an enhanced photocatalytic activity with good stability. The photogenerated holes (h⁺) and superoxide radicals (O·₂¯) play critical roles during the photocatalytic process. Ag₃VO₄/Bi₂WO₆ will have great potential in applications for environmental remediation due to the facile preparation method and superior photocatalytic activity.
- Subject
- Ag₃VO₄; Bi₂WO₆; heterojunction; visible-light-driven; photocatalysis
- Identifier
- http://hdl.handle.net/1959.13/1396724
- Identifier
- uon:34102
- Identifier
- ISSN:0021-9797
- Language
- eng
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