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Deposition of BiOBr thin films by thermal evaporation and evaluation of its photocatalytic activity

Paper ID Volume ID Publish Year Pages File Format Full-Text
53842 46987 2015 5 PDF Available
Title
Deposition of BiOBr thin films by thermal evaporation and evaluation of its photocatalytic activity
Abstract

•Thin film of BiOBr was elaborated by thermal evaporation deposition.•The deposition of the thin film was oriented in the direction of the (1 0 0) facet.•Thin film of BiOBr showed high photocatalytic activity in the degradation of RhB.•The photocatalytic activity of the thin film was maintained high after four cycles.

Thin films of BiOBr were prepared by a sequential evaporation process in a thermal evaporation system (TES) starting from BiOBr powders previously synthesized by co-precipitation. The deposition rate was fixed at 1.2 Å s−1 to get a controlled evaporation of the material using glass slides as substrate. BiOBr thin films with a thickness of 300 nm were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The analysis by XRD of the thin film deposited confirmed the formation of BiOBr, showing a high degree of specific crystal orientation in {0 0 1} planes. In the same way, SEM analysis showed that the deposition of oxide took place by formation of plates and small particles with shape of flowers. The photocatalytic activity of BiOBr thin films was evaluated in the degradation reaction of rhodamine B (RhB) in aqueous solution under sun-like irradiation. BiOBr thin films were able to bleach a solution of RhB (5 mg L−1) in 99% after 24 h, and to mineralize a solution of RhB (50 mg L−1) in 38% after 96 h.

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Keywords
BiOBr; Photocatalysis; Thin film; Thermal evaporation
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Deposition of BiOBr thin films by thermal evaporation and evaluation of its photocatalytic activity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 252, 1 September 2015, Pages 2–6
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us