光催化
异质结
材料科学
可见光谱
氮化碳
水溶液
压电
纳米技术
光化学
光电子学
化学工程
复合材料
化学
催化作用
有机化学
工程类
作者
Rongdi Tang,Hao Zeng,Chengyang Feng,Sheng Xiong,Ling Li,Zhanpeng Zhou,Daoxin Gong,Lin Tang,Daoxin Gong
出处
期刊:Small
[Wiley]
日期:2023-02-11
卷期号:19 (18)
被引量:26
标识
DOI:10.1002/smll.202207636
摘要
Herein, a twisty C-TiO2 /PCN (CNT) Step-scheme (S-scheme) heterojunction is fabricated and applied to degrade ciprofloxacin (CIP) with the assistance of ultrasonic vibration and visible light irradiation. The nitrogen-rich twisty polymeric carbon nitride (PCN) can not only induce a non-centrosymmetric structure with enhanced polarity for a better piezoelectric effect but also provide abundant lone pair electrons to promote n→π* transition during photocatalysis. Its hybridization with C-TiO2 particles can construct S-scheme heterojunction in CNT. During the piezo-photocatalysis, the strain-induced polarization electric field in the heterojunction can regulate the electron migration between the two components, resulting in a more effective CIP degradation. With the synergistic effect of ultrasonic vibration and visible light irradiation, the reaction rate constant of CIP degradation by CNT increases to 0.0517 min-1 , which is 1.86 times that of photocatalysis and 6.46 times that of ultrasound. This system exhibits a stable CIP decomposition efficiency under the interference of various environmental factors. In addition, the in-depth investigation found that three pathways and 12 major intermediates with reduced toxicity are produced after the reaction. Hopefully, the construction of this twisty CNT S-scheme heterojunction with enhanced piezo-photocatalytic effect offers inspiration for the design of environmentally functional materials.
科研通智能强力驱动
Strongly Powered by AbleSci AI