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Constructing photocatalysis-self-Fenton system over a defective twin C3N4: In-situ producing H2O2 and mineralizing organic pollutants
Yue, Junpeng1; Yang, Hanpei1,3; Liu, Chen2; Zhang, Qiang1; Ao, Yanhui1
2023-08-15
摘要A new strategy to realize efficient removal of organics from water through photo-self-Fenton was investigated. Characterizations and calculations demonstrated that a novel twin carbon nitride with abundant surficial Ndefects and compressed n-n layer stacking can be constructed by thermal polymerization of urea under suitable basicity. Synergistically, the twins exhibited an in-situ H2O2 producing at a rate as high as 26.36 mM h-1 g-1 at 420 nm that exceeded most reported C3N4, and their mineralization rates for Tetracycline Hydrochloride, Bisphenol A, Ciprofloxacin, and Rhodamine B reached 8.8, 15.2, 9.1, and 13 times higher than that of pristine C3N4. It is concluded that enriching both of photogenerated electrons and molecular oxygens on specific sites plays a crucial role during photocatalysis-self-Fenton process. Particular attentions have to be paid to build structures achieving one and two-electron reduction of O2, and activation of H2O2 to & BULL;OH simultaneously.
关键词Defective twin carbon nitride Photocatalysis-self-Fenton Utilization of electrons Organic pollutants mineralization
DOI10.1016/j.apcatb.2023.122716
发表期刊APPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
卷号331页码:12
通讯作者Yang, Hanpei(yanghanpei@hhu.edu.cn)
收录类别SCI
WOS记录号WOS:001053267900001
语种英语