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Characterization of BiOX compounds as photocatalysts for the degradation of pharmaceuticals in water

Paper ID Volume ID Publish Year Pages File Format Full-Text
45453 46412 2015 10 PDF Available
Title
Characterization of BiOX compounds as photocatalysts for the degradation of pharmaceuticals in water
Abstract

•BiOX catalysts were used to degrade two estrogens in water.•BiOX catalysts were compared to others using many complimentary methods.•BiOX catalysts were found to be more effective than others.•The properties of the catalysts were correlated with photocatalytic activity.•This advances fundamental understanding of BiOX catalysts and estrogen degradation.

The surface and photophysical properties of bismuth oxyhalide catalysts were determined and correlated with photocatalytic activity. The catalysts themselves were characterized using SEM-EDS, XRD, BET and steady-state luminescence. The photocatalytic potential of these catalysts was determined for their ability to degrade 17 α-ethinyl estradiol (EE2) and estriol at the ppm level in water. The degree of photodecomposition was evaluated using luminescence spectroscopy and HPLC-MS/MS. This is the first time BiOX catalysts have been used to photodegrade synthetic estrogens. Also, this study reports that these BiOX catalysts are more effective at photocatalyzing the selected pharmaceuticals than traditional catalysts such as TiO2. The photocatalytic mechanisms for EE2 and estriol were compared between samples treated with BiOX and TiO2. These BiOX catalysts show great potential as solution to waste water treatment and environmental remediation.

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Keywords
BiOX; Photocatalysis; Pharmaceuticals; Water remediation
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Characterization of BiOX compounds as photocatalysts for the degradation of pharmaceuticals in water
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 179, December 2015, Pages 229–238
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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