Research on photosensitivity of benzoquinones and benzoquinoneimines in the sunlight/Fe2+/S2O8 2− system

Research on photosensitivity of benzoquinones and benzoquinoneimines in the sunlight/Fe2+/S2O8... This paper investigated the photodegradation characteristics of benzoquinones and benzoquinoneimines. The photosensitivity of benzoquinones and benzoquinoneimines were analyzed by measuring the yield of SO 4 −· in a light/Fe2+/S2O8 2− system and the degradation mechanism of benzoquinones, then discussed benzoquinoneimines in light/Fe2+/S2O8 2− and light/S2O8 2− system. The results revealed that a more aggressive oxidation of benzoquinones and benzoquinoneimines by the sunlight/Fe2+/S2O8 2− method showed a more rapid and more complete removal of chromaticity than that of the UV/Fe2+/S2O8 2− method. It was showed that they were photosensitizers, and they could generate 1O2 and O 2 −· which could promote the formation of SO 4 −· and ·OH in the sunlight system. Nevertheless, for benzoquinones, the sunlight/S2O8 2− method was superior to the UV/S2O8 2− method. For benzoquinoneimines, the sunlight/S2O8 2− method was inferior to the UV/S2O8 2− method. In addition, the yield of SO 4 −· in the sunlight/Fe2+/S2O8 2− system was more than that of the UV/Fe2+/S2O8 2− system. Therefore, the photosensitivity of benzoquinones is superior to benzoquinoneimines in water treatment. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Research on photosensitivity of benzoquinones and benzoquinoneimines in the sunlight/Fe2+/S2O8 2− system

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Publisher
Springer Netherlands
Copyright
Copyright © 2016 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-016-2753-y
Publisher site
See Article on Publisher Site

Abstract

This paper investigated the photodegradation characteristics of benzoquinones and benzoquinoneimines. The photosensitivity of benzoquinones and benzoquinoneimines were analyzed by measuring the yield of SO 4 −· in a light/Fe2+/S2O8 2− system and the degradation mechanism of benzoquinones, then discussed benzoquinoneimines in light/Fe2+/S2O8 2− and light/S2O8 2− system. The results revealed that a more aggressive oxidation of benzoquinones and benzoquinoneimines by the sunlight/Fe2+/S2O8 2− method showed a more rapid and more complete removal of chromaticity than that of the UV/Fe2+/S2O8 2− method. It was showed that they were photosensitizers, and they could generate 1O2 and O 2 −· which could promote the formation of SO 4 −· and ·OH in the sunlight system. Nevertheless, for benzoquinones, the sunlight/S2O8 2− method was superior to the UV/S2O8 2− method. For benzoquinoneimines, the sunlight/S2O8 2− method was inferior to the UV/S2O8 2− method. In addition, the yield of SO 4 −· in the sunlight/Fe2+/S2O8 2− system was more than that of the UV/Fe2+/S2O8 2− system. Therefore, the photosensitivity of benzoquinones is superior to benzoquinoneimines in water treatment.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Oct 11, 2016

References

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