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ID 115712
Author
Wang, Ruiling Tokushima University|Luoyang Ship Material Research Institute
Xie, Tian Tokushima University
Sun, Zhiyong Luoyang Ship Material Research Institute
Pu, Taofei Tokushima University
Li, Weibing Luoyang Ship Material Research Institute|Qingdao University of Science and Technology
Content Type
Journal Article
Description
In this study, graphene quantum dot (GQD) modified g-C3N4 (GQDs/CN) composite photocatalysts were prepared. The photocatalytic ammonia degradation properties of the GQDs/CN composites were much higher than that of pure g-C3N4. When the amount of GQDs added reached 0.5 wt% the GQDs/CN composite showed the best performance for photocatalytic total ammonia nitrogen (TAN) removing, and a 90% TAN removing rate was achieved in 7 hours under visible light illumination (200 mW cm−2), which is approximately 3 times higher than that of pure g-C3N4. The increased photocatalytic property was contributed by the photon adsorption ability and electron transfer capacity, which were improved after GQD modification. The main photocatalytic end-product of TAN was NO3− which is a type of environmentally green ion. Further results indicated that the oxygen concentration and pH value of the reaction solution were very important for the photocatalytic ammonia degradation process. A better performance could be achieved under a higher oxygen concentration and pH value.
Journal Title
RSC Advances
ISSN
20462069
Publisher
The Royal Society of Chemistry
Volume
7
Issue
81
Start Page
51687
End Page
51694
Published Date
2017-11-07
Rights
This article is licensed under a Creative Commons Attribution 3.0 Unported Licence(https://creativecommons.org/licenses/by/3.0/).
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DOI (Published Version)
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language
eng
TextVersion
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departments
Science and Technology