Carbon nitride from urea: Mechanistic study on photocatalytic hydrogen peroxide production for methyl orange removal

被引：4
|
作者：
Velazquez, Laura S. Gomez [1 ]
Dell'Arciprete, Maria L. [1 ]
Madriz, Lorean [1 ,2 ,3 ]
Gonzalez, Monica C. [1 ]
机构：
[1] Univ Nacl La Plata, Inst Invest Fisicoquim Teor & Aplicadas INIFTA, CCT La Plata CONICET, La Plata, Argentina
[2] CCT La Plata CONICET, Inst Tecnol Chascomus INTECH, Chascomus, Buenos Aires, Argentina
[3] Univ Nacl San Martin UNSAM, Escuela Bio & Nanotecnol, Chascomus, Buenos Aires, Argentina
来源：
CATALYSIS COMMUNICATIONS | 2023年 / 175卷
关键词：
Carbon nitride; Azo dyes; Hydrogen peroxide; Visible light; Urea; Reactive species; Vibrio Fischeri; VISIBLE-LIGHT; NEONICOTINOID PESTICIDES; REDUCTION; DEGRADATION; PHOTOREDUCTION; POTENTIALS; OXIDATION; RADICALS; G-C3N4; GENERATION;
D O I：
10.1016/j.catcom.2023.106617
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Herein, we investigated the photocatalytic removal of methyl orange (MO) under 350 nm irradiation with carbon nitride (CN) nanoparticles from urea. Participation of photogenerated charge carriers and secondary reactive species in MO degradation process was evaluated by scavenging and photoelectrochemical assays. The experi-ments suggest that HO center dot radicals are not only formed from the reaction of water with photogenerated holes, but via a three consecutive one-electron reduction of O2 involving the formation of H2O2. The photocatalytic MO degradation mechanism was proposed. The present results emphasize the importance of charge carriers' sepa-ration in the optimization of CN photocatalysis for technological uses.
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页数：12
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