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Novel two-step synthesis method of thin film heterojunction of BiOBr/Bi2WO6 with improved visible-light-driven photocatalytic activity
Abstract
A novel two-step ionic liquid assisted procedure was applied for a controllable synthesis of BiOBr/Bi2WO6 heterojunction thin films. The preparation route involved an anodic oxidation of tungsten foil and hydrothermal transformation of as-anodized oxide in the presence of bismuth precursor and ionic liquid, N-butylpyridinium bromide [BPy][Br]. The BiOBr plates with irregular shapes adhered to the surface of flower-like Bi2WO6 and formed a heterojunction between BiOBr and Bi2WO6, as confirmed by the analysis of their structure and composition. The highest efficiency of phenol degradation was achieved when the highest amount of IL was used (the apparent quantum efficiency was almost 8 and 71.5 times higher compared to BiOBr and Bi2WO6, respectively). In addition, superoxide radicals (•O2–) were found as the main factor responsible for the photodegradation. A possible reaction mechanism was further investigated as a function of monochromatic irradiation to determine the exact range of the composite photoactivity.
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Authors (5)
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Wojciech Lisowski dr hab.
- Polska Akademia Nauk
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Adriana Zaleska-Medynska prof. dr hab.
- Uniwersytet Gdański
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Paweł Mazierski dr inż.
- Uniwersytet Gdański
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Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.apsusc.2021.151082
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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APPLIED SURFACE SCIENCE
no. 569,
ISSN: 0169-4332 - Language:
- English
- Publication year:
- 2021
- Bibliographic description:
- Pancielejko A., Łuczak J., Lisowski W., Zaleska-Medynska A., Mazierski P.: Novel two-step synthesis method of thin film heterojunction of BiOBr/Bi2WO6 with improved visible-light-driven photocatalytic activity// APPLIED SURFACE SCIENCE -Vol. 569, (2021), s.151082-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.apsusc.2021.151082
- Sources of funding:
- Verified by:
- Gdańsk University of Technology
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