Promotion effect of free Ag ions on photocatalytic dechlorination processes

Free silver ions (Ag + ) in the solution exhibit enhanced photocatalytic dechlorination processes of organic chloride, including 2-chlorophenol (2-CP), 2,4-dichlorophenol (2,4-DCP) and 2,4,6-trichlorophenol (2,4,6-TCP), over copper phenylacetylene (PhC 2 Cu) under visible light irradiation. The conc...

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Bibliographic Details
Published in:Catalysis science & technology 2022-05, Vol.12 (1), p.329-3218
Main Authors: Tian, Meng, Qian, Jing, Hou, Jiawei, Bai, Yadi, Jiang, Hai-Ying, Ren, Jingyun
Format: Article
Language:English
Subjects:
Dechlorination
Light irradiation
Ortho-chlorophenol
Photocatalysis
Silver nitrate
Trichlorophenols
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Summary:Free silver ions (Ag + ) in the solution exhibit enhanced photocatalytic dechlorination processes of organic chloride, including 2-chlorophenol (2-CP), 2,4-dichlorophenol (2,4-DCP) and 2,4,6-trichlorophenol (2,4,6-TCP), over copper phenylacetylene (PhC 2 Cu) under visible light irradiation. The concentration of AgNO 3 remarkably affects the dechlorination activity of PhC 2 Cu. With the optimal concentration of 2 mM AgNO 3 , PhC 2 Cu showed the best photocatalytic performance, and the dechlorination rate of PhC 2 Cu was 2.3-fold enhanced under visible light irradiation for 80 minutes. This deep mechanism study demonstrated that free Ag + in the solution, but not the deposited Ag particles on the surface of PhC 2 Cu, plays the most imported role in promoting the photocatalytic dechlorination process by forming the insoluble salt of AgCl. Free silver ions (Ag + ) in the solution exhibit enhanced photocatalytic dechlorination processes of organic chloride, including 2-chlorophenol, 2,4-dichlorophenol and 2,4,6-trichlorophenol, over PhC 2 Cu under visible light irradiation.
ISSN:2044-4753
2044-4761
DOI:10.1039/d1cy02210e