光合作用
氧气
氮气
化学
过氧化氢
降级(电信)
光催化
吸附
光化学
析氧
石墨氮化碳
激进的
催化作用
电极
生物化学
有机化学
电化学
计算机科学
电信
物理化学
作者
Jiaoni Li,Jinhui Huang,Guangming Zeng,Chenyu Zhang,Hanbo Yu,Qiongfang Wan,Kaixin Yi,Wei Zhang,Haoling Pang,Si Liu,Suzhou Li,Wenjuan He
标识
DOI:10.1016/j.cej.2023.142512
摘要
The development of photocatalysts for the efficient generation of hydrogen peroxide (H2O2) and degradation of antibiotic pollutants is a mutual-beneficial solution to the chemical resource demands and environmental remediation. Herein, efficient visible-light-driven H2O2 production and antibiotic degradation are achieved by using nitrogen-deficient modified polymeric carbon nitride (g-C3N4) to facilitate the reduction of dioxygen. The N defects modified g-C3N4 reached an excellent H2O2 generation rate of 623.5 μmol g−1h−1 without O2 bubbling. The structural features and entire photocatalytic conversion process were systematically studied via experiments and theoretical calculations. It was found that the N defects in the framework constructed a giant internal electric field (IEF), which effectively inhibited carrier recombination. Revealed the neglected H2O2 production via 1O2 pathway, which effectively promoting the selective 2e− oxygen reduction reaction (ORR). More interestingly, the N defects structure greatly improved the O2 adsorption ability and O2 production ability of the material, while inhibiting the in situ generated H2O2 from being decomposed and maintaining high efficiency of H2O2 production under air conditions. This study thoroughly revealed the synergistic effects of the terminal cyano group and nitrogen vacancies over g-C3N4 for efficient H2O2 photogeneration photosynthesis.
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