g-C3N4/Ag@AgCl with Z-scheme heterojunction and Ag electron bridge for enhanced photocatalytic degradation of tetracycline wastewater

Building Z-scheme heterojunctions with an electron bridge is a favored function for increasing photocatalytic activity. A facile approach for preparing g-C 3 N 4 /Ag@AgCl ternary heterojunctions by co-precipitation and photoreduction was established in this work. First, via co-precipitation, AgCl wa...

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Published in:Environmental science and pollution research international 2023-11, Vol.30 (52), p.112462-112473
Main Authors: Zhang, Baiyan, Zhang, Hongfen, Ma, Dan, Liang, Fangmiao, Lan, Hongli, Yan, Feifei
Format: Article
Language:English
Subjects:
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Carbon nitride
Catalytic activity
Coprecipitation
Earth and Environmental Science
Ecotoxicology
Electron transport
Environment
Environmental Chemistry
Environmental Health
Heterojunctions
Photocatalysis
Photodegradation
Photoreduction
Research Article
Silver
Silver chloride
Waste Water Technology
Water Management
Water Pollution Control
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Summary:Building Z-scheme heterojunctions with an electron bridge is a favored function for increasing photocatalytic activity. A facile approach for preparing g-C 3 N 4 /Ag@AgCl ternary heterojunctions by co-precipitation and photoreduction was established in this work. First, via co-precipitation, AgCl was modified on the surface of g-C 3 N 4 to create a broad contact area between AgCl and g-C 3 N 4 . The AgCl is then reduced to Ag via an in-situ photoreduction technique, resulting in the formation of a ternary composite. The experimental results showed that when g-C 3 N 4 modified 25% of the Ag@AgCl, that is, g-C 3 N 4 /Ag@AgCl-25 had the best photocatalytic performance, 94.9% of TC was degraded within 240 min, and the reaction rate to TC was 0.1214 min -1 , which was 4.49 times and 8.12 times higher than that of g-C 3 N 4 and Ag/AgCl, respectively. The excellent photocatalytic performance of g-C 3 N 4 /Ag@AgCl is attributed to the LSPR effect of Ag NPs and O-doping g-C 3 N 4 , which broadens the absorbance performance of g-C 3 N 4 , the establishment of Z-type heterojunctions between AgCl NPs and g-C 3 N 4 NSs and Ag NPs as an electron transport bridge accelerate the photogenerated electrons transfer between AgCl and g-C 3 N 4 .
ISSN:1614-7499
0944-1344
1614-7499
DOI:10.1007/s11356-023-30183-7