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Issue 11, 2015
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Photocatalytic organic degradation over W-rich and Cu-rich CuWO4 under UV and visible light

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Abstract

A hydrothermal reaction between Cu(NO3)2 and Na2WO4 at 170 °C, followed by sintering at 500 °C, resulted in the formation of stoichiometric CuWO4 at pH 5.2, while the reactions below and above pH 5.2 gave a mixture of CuWO4 with WO3 and CuO, respectively. For organic degradation in water under visible light, W-rich and Cu-rich samples were less and more active than CuWO4, respectively. A maximum activity was observed with the sample prepared at pH 8.5. Furthermore, this Cu-rich sample shown an activity greatly changing with its sintering temperature, and reaching a maximum at 600 °C. A possible mechanism responsible for the observed activity difference among the samples is proposed, involving the interfacial charge transfer between CuWO4 and WO3 or CuO.

Graphical abstract: Photocatalytic organic degradation over W-rich and Cu-rich CuWO4 under UV and visible light

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Supplementary files

Article information


Submitted
06 Nov 2014
Accepted
22 Dec 2014
First published
23 Dec 2014

RSC Adv., 2015,5, 8108-8113
Article type
Paper
Author version available

Photocatalytic organic degradation over W-rich and Cu-rich CuWO4 under UV and visible light

H. Chen and Y. Xu, RSC Adv., 2015, 5, 8108 DOI: 10.1039/C4RA13952F

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