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Synergistic Photocatalysis‐Catalytic Peroxidation of BiOBr/H 2 O 2 System for 4‐Chlorophenol Degradation
Author(s) -
Hou Rujing,
Chen Xiaofang,
Gao Yuan,
Zhu Huijuan,
Li Shiqing,
Li Hexing,
Huo Yuning
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201600183
Subject(s) - decomposition , hydroquinone , radical , catalysis , degradation (telecommunications) , photocatalysis , benzoquinone , chemistry , photochemistry , nuclear chemistry , phenol , materials science , organic chemistry , telecommunications , computer science
The synergistic BiOBr/H 2 O 2 system was developed to improve the visible‐light photo‐degradation activity of 4‐chlorophenol (4‐CP). It was demonstrated that the BiOBr catalyst could decompose H 2 O 2 molecular efficiently under visible light irradiations. Based on the trapping test, the main active species of ⋅O 2 − radicals in BiOBr/H 2 O 2 system accelerated the efficient decomposition of H 2 O 2 to form the ⋅OH radicals, which further reacted with the 4‐CP. In comparison, the photo‐induced holes were the main active species during the photo‐degradation of 4‐CP on the single BiOBr catalyst. Furthermore, the intermediate of both benzoquinone and hydroquinone during the 4‐CP photo‐degradation in the BiOBr/H 2 O 2 system, was determined by the HPLC‐MS measurement, which was followed by the final decomposition to CO 2 . In addition, the high crystallization resulted in the stability of BiOBr in the BiOBr/H 2 O 2 system, indicative of the potential practical application for the wastewater treatment.