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Photoelectrochemical degradation of anti-inflammatory pharmaceuticals at Bi2MoO6–boron-doped diamond hybrid electrode under visible light irradiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
47768 46481 2009 7 PDF Available
Title
Photoelectrochemical degradation of anti-inflammatory pharmaceuticals at Bi2MoO6–boron-doped diamond hybrid electrode under visible light irradiation
Abstract

Bi2MoO6 particles were selectively deposited onto a boron-doped diamond (BDD) surface from amorphous complex solution via a dip-coating method followed by calcination. Its structure was confirmed via Raman and X-ray diffraction analysis. Scanning electron microscopy showed that the resulting Bi2MoO6 particles scattered on the BDD substrate. The photoelectrochemical measurement of the Bi2MoO6–BDD electrode showed a clear improvement in the photocurrent under visible light irradiation, indicating a new hybrid system. Furthermore, the hybrid electrode was applied in the degradation of ibuprofen and naproxen, two kinds of non-steroidal anti-inflammatory drugs via photocatalysis, electro-oxidation, and photoelectrocatalytic processes. It is shown that ibuprofen can be degraded via photocatalysis and electro-oxidation process with the applied bias potential of 2.0 V. By contrast, ibuprofen and naproxen can be rapidly degraded via combined electro-oxidation and photocatalysis process under visible light irradiation. Furthermore, the degradation rate in the combined process is larger than the sum of photocatalysis and electro-oxidation processes. The ibuprofen and naproxen were also efficiently mineralized in the combined process. Finally, the main intermediates of ibuprofen degradation were also identified.

Keywords
Ibuprofen; Naproxen; BDD electrode; Photoelectrocatalysis; Visible light
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Photoelectrochemical degradation of anti-inflammatory pharmaceuticals at Bi2MoO6–boron-doped diamond hybrid electrode under visible light irradiation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 91, Issues 1–2, 7 September 2009, Pages 539–545
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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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
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