Criticial Assessment of the Photocatalytic Reduction of Cr(VI) over Au/TiO2

The purification of drinking water is one of the most urgent challenges in developing countries, for which the efficient removal of traces of heavy metals, e.g., Cr(IV), represents a key technology. This can be achieved via photocatalysis. In this study, we compare the performance of Au/TiO2 to bare...

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Bibliographic Details
Published in:Catalysts 2018-12, Vol.8 (12), p.606
Main Authors: Ngo, Anh Binh, Nguyen, Hong Lien, Hollmann, Dirk
Format: Article
Language:English
Subjects:
Acids
Catalysts
Chemical reactions
Chromium
Citric acid
Conversion
Developing countries
Drinking water
Heavy metals
In situ leaching
Investigations
LDCs
Leaching
Light
Photocatalysis
Reagents
Spectrum analysis
Titanium dioxide
Water purification
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Summary:The purification of drinking water is one of the most urgent challenges in developing countries, for which the efficient removal of traces of heavy metals, e.g., Cr(IV), represents a key technology. This can be achieved via photocatalysis. In this study, we compare the performance of Au/TiO2 to bare TiO2 P25 catalysts. Furthermore, the influence of the sacrificial reagent citric acid under UV-Vis and Vis excitation was investigated and a detailed investigation of the catalysts before and after reaction was performed. During the photocatalytic reduction of Cr(IV) under acidic conditions, both leaching of Au, as well as absorption of Cr, occur, resulting in new catalyst systems obtained in situ.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal8120606