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Visible-light-driven H2O2 production from O-2 reduction with nitrogen vacancy-rich and porous graphitic carbon nitride
Wang, Yanbin; Meng, Di; Zhao, Xu
2020-09-15
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
Volume273Pages:1-11
AbstractVisible-light-driven H2O2 production from O-2 reduction is an eco-friendly strategy and attracts increasing attentions. In this study, KOH modified graphitic carbon nitrides (CNKx) were constructed through the thermolysis of melamine-cyanuric acid supramolecular-complex in the presence of KOH. The BET specific surface area of CNK0.2 with porous structure was 92 m(2) g(-1). The photocatalyst was characterized by XPS, ESR and element analysis and the analysis suggested that nitrogen vacancy was created in the framework of g-C3N4. Photoluminescence (PL) spectra indicated that the recombination of photogenerated electrons and holes was efficiently suppressed. zeta-potential revealed that more negative charge on the surface of CNK0.2, which promoted the adsorption of O-2 and accelerated the photocatalytic H2O2 production. ESR experimental and radical quenching results illustrated that superoxide radical (O-2-(center dot)) was the primary intermediate during the O-2 reduction process, suggesting the O-2 reduction pathway by CNK0.2 was the sequential two-step single-electron reduction.
Department中国科学院饮用水科学与技术重点实验室
KeywordHydrogen peroxide Photocatalysis Oxygen reduction reaction Graphitic carbon nitride Nitrogen vacancy
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/45384
Collection中国科学院饮用水科学与技术重点实验室
Recommended Citation
GB/T 7714
Wang, Yanbin,Meng, Di,Zhao, Xu. Visible-light-driven H2O2 production from O-2 reduction with nitrogen vacancy-rich and porous graphitic carbon nitride[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2020,273:1-11.
APA Wang, Yanbin,Meng, Di,&Zhao, Xu.(2020).Visible-light-driven H2O2 production from O-2 reduction with nitrogen vacancy-rich and porous graphitic carbon nitride.APPLIED CATALYSIS B-ENVIRONMENTAL,273,1-11.
MLA Wang, Yanbin,et al."Visible-light-driven H2O2 production from O-2 reduction with nitrogen vacancy-rich and porous graphitic carbon nitride".APPLIED CATALYSIS B-ENVIRONMENTAL 273(2020):1-11.
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