NDLI: Research on photosensitivity of benzoquinones and benzoquinoneimines in the sunlight/Fe$^{2+}$/S$_{2}$O$

Content Provider	Springer Nature Link
Author	Wang, Anjing He, Junmei Kong, Lingna Zhang, Naidong Zheng, Tong
Copyright Year	2016
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/Fe$^{2+}$/S$_{2}$O$_{8}$ $^{2−}$ system and the degradation mechanism of benzoquinones, then discussed benzoquinoneimines in light/Fe$^{2+}$/S$_{2}$O$_{8}$ $^{2−}$ and light/S$_{2}$O$_{8}$ $^{2−}$ system. The results revealed that a more aggressive oxidation of benzoquinones and benzoquinoneimines by the sunlight/Fe$^{2+}$/S$_{2}$O$_{8}$ $^{2−}$ method showed a more rapid and more complete removal of chromaticity than that of the UV/Fe$^{2+}$/S$_{2}$O$_{8}$ $^{2−}$ method. It was showed that they were photosensitizers, and they could generate $^{1}$O$_{2}$ and O 2 −· which could promote the formation of SO 4 −· and $^{·}$OH in the sunlight system. Nevertheless, for benzoquinones, the sunlight/S$_{2}$O$_{8}$ $^{2−}$ method was superior to the UV/S$_{2}$O$_{8}$ $^{2−}$ method. For benzoquinoneimines, the sunlight/S$_{2}$O$_{8}$ $^{2−}$ method was inferior to the UV/S$_{2}$O$_{8}$ $^{2−}$ method. In addition, the yield of SO 4 −· in the sunlight/Fe$^{2+}$/S$_{2}$O$_{8}$ $^{2−}$ system was more than that of the UV/Fe$^{2+}$/S$_{2}$O$_{8}$ $^{2−}$ system. Therefore, the photosensitivity of benzoquinones is superior to benzoquinoneimines in water treatment.
Starting Page	2175
Ending Page	2186
Page Count	12
File Format	PDF
ISSN	09226168
Journal	Research on Chemical Intermediates
Volume Number	43
Issue Number	4
e-ISSN	15685675
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-10-11
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sunlight Photosensitivity Benzoquinoneimines Benzoquinones Singlet oxygen Superoxide anion radical Catalysis Physical Chemistry Inorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry

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