Photodegradation of p-nitrophenol using octahedral Cu2O particles immobilized on a solid support under a tungsten halogen lamp

Authors: Wei Zhai, Fengqiang Sun, Wei Chen, Zizhao Pan, Lihe Zhang, Shaohua Li, Shuilan Feng, Yiyi Liao, Weishan Li

Abstract:
Octahedral Cu₂O particles were prepared on an indium-tin oxide glass via electrodeposition and were employed in the catalytic degradation of p-nitrophenol in the presence of H₂O₂. Under irradiation of a warm visible-light source, tungsten halogen lamp, Cu2O particles not only acted as a photocatalyst, but might also act as a thermal-catalyst to induce the decomposition of H₂O₂ and produce O₂ at higher temperatures. The photogenerated electrons and holes could react with H₂O₂, O₂, and H₂O to produce abundant •OH radicals, resulting in the effective oxidation of p-nitrophenol. High-performance liquid chromatography measurements of degradation intermediates showed that p-nitrophenol was first decomposed into hydroquinone and benzoquinone and then mineralized. The degradation efficiency was dependent on electrodeposition time, light intensity, H₂O₂ amount, and solution temperature. This catalyst could be easily recycled and used in the efficient degradation of other phenolic compounds. 

Keywords:
Octahedral Cu₂O particles
Electrodeposition
p-Nitrophenol
Photodegradation

Published in: Applied catalysis A: General  (Volume 454, Pages 1-172, 15 March 2013)

Publisher: Elsevier

ISSN Information: 0926-860X

Photodegradation of p-nitrophenol using octahedral Cu2O particles immobilized on a solid support under a tungsten halogen lamp

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