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Zhan Xinyuan,She Zhixiang,Yue Zhengbo,Hu Fupeng,Wang Guangcheng,Wang Shaoping,Li Wei,Liu Bing,Wang Jin 한국화학공학회 2024 Korean Journal of Chemical Engineering Vol.41 No.1
Fe-doped g-C 3 N 4 has been proven to have the potential of visible light photocatalysis, but its catalytic activity of peroxymonosulfate (PMS) is neglected. Herein, the complex advanced oxidation processes of Fe-g-C 3 N 4 mediated PMS and visible light photocatalysis was developed, named as Vis/Fe-g-C 3 N 4 /PMS system, whose eff ects and synergistic mechanism for decomposing Rhodamine B (RhB) was evaluated. The coupling of sulfate radicals and photocatalysis for RhB degradation showed that the synergistic effi ciency ( η Syn ) and factor ( S c ) were 20.1% and 4.82, respectively, with a degradation effi ciency of 99.8%. Iron species dispersed on g-C 3 N 4 provided active sites for PMS activation to generate sulfate radicals, simultaneously reduced the forbidden band, and separated the photo-generated charges of g-C 3 N 4 . h + , SO 4 · ‾ and 1 O 2 were the main active species, and the increase of 1 O 2 was the cause of the synergistic eff ect. The possible degradation path of RhB by this coupling system was proposed. Our fi ndings prove that Vis/Fe-g-C 3 N 4 /PMS system has a great potential to decompose dye wastewater, and also to be an environmental remediation perspective.