Enhanced Degradation of Norfloxacin Under Visible Light by S-Scheme Fe₂O₃/g-C₃N₄ Heterojunctions.

IF 4.2 2区化学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY Molecules Pub Date : 2024-11-04 DOI:10.3390/molecules29215212

Guang Lu, Wei Li, Zheng Li, Guizhou Gu, Qiuju Han, Jiling Liang, Zhen Chen

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Abstract

S-scheme Fe₂O₃/g-C₃N₄ heterojunctions were successfully fabricated by the ultrasonic assistance method to remove norfloxacin (NOR) under visible light irradiation. The synthesized catalysts were well studied through various techniques. The obtained Fe₂O₃/g-C₃N₄ heterojunctions exhibited an optimal photocatalytic degradation of 94.7% for NOR, which was 1.67 and 1.28 times higher than using Fe₂O₃ and g-C₃N₄ alone, respectively. In addition, the kinetic constant of NOR removal with Fe₂O₃/g-C₃N₄ composites was about 0.6631 h^-1, and NOR photo-deegradation was still 86.7% after four cycles. The enhanced photocatalytic activity may be mainly attributed to the formation of S-scheme Fe₂O₃/g-C₃N₄ heterojunctions with built-in electric fields, which were beneficial to the separation and transfer of photostimulated charge carriers. Furthermore, a possible photo-degradation mechanism of NOR for S-scheme Fe₂O₃/g-C₃N₄ heterojunctions is described.

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S-Scheme Fe2O3/g-C3N4 异质结在可见光下增强诺氟沙星的降解能力

利用超声辅助法成功制备了 S 型 Fe2O3/g-C3N4 异质结，可在可见光照射下去除诺氟沙星（NOR）。通过各种技术对合成的催化剂进行了深入研究。所获得的 Fe2O3/g-C3N4 异质结对 NOR 的最佳光催化降解率为 94.7%，分别是单独使用 Fe2O3 和 g-C3N4 的 1.67 倍和 1.28 倍。此外，Fe2O3/g-C3N4 复合材料去除 NOR 的动力学常数约为 0.6631 h-1，四个循环后 NOR 的光降解率仍为 86.7%。光催化活性增强的主要原因可能是形成了具有内置电场的 S 型 Fe2O3/g-C3N4 异质结，这有利于光刺激电荷载流子的分离和转移。此外，还描述了 S 型 Fe2O3/g-C3N4 异质结可能的 NOR 光降解机制。

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来源期刊

Molecules 化学-有机化学

CiteScore

7.40

自引率

8.70%

发文量

7524

审稿时长

1.4 months

期刊介绍： Molecules (ISSN 1420-3049, CODEN: MOLEFW) is an open access journal of synthetic organic chemistry and natural product chemistry. All articles are peer-reviewed and published continously upon acceptance. Molecules is published by MDPI, Basel, Switzerland. Our aim is to encourage chemists to publish as much as possible their experimental detail, particularly synthetic procedures and characterization information. There is no restriction on the length of the experimental section. In addition, availability of compound samples is published and considered as important information. Authors are encouraged to register or deposit their chemical samples through the non-profit international organization Molecular Diversity Preservation International (MDPI). Molecules has been launched in 1996 to preserve and exploit molecular diversity of both, chemical information and chemical substances.