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Journal of Zhejiang University SCIENCE A
ISSN 1673-565X(Print), 1862-1775(Online), Monthly
2022 Vol.23 No.12 P.988-997
Enhanced photocatalytic performance of S-doped covalent triazine framework for organic pollutant degradation
Abstract: Photocatalysis using the abundant solar energy is an environmentally friendly and efficient way to degrade organic matter. Covalent triazine frameworks (CTFs), a new class of metal-free organic semiconductors responsive to visible light, are promising materials for water treatment. In this study, an original CTF, namely CTF-1, was modified by S-doping to form CTFSx, which were used as metal-free catalysts for degradation of methyl orange (MO) and bisphenol A (BPA). The outcomes demonstrated that the photocatalytic degradation of MO and BPA by CTFSx was superior to that by CTF-1, with better stability and reusability. Within 6 h, 53.2% MO and 84.7% BPA were degraded by CTFS5, and the degradation rate constants were 0.145 h-1 and 0.29 h-1, respectively, which were 3.6 and 5.8 times higher than those of CTF-1. Further investigation revealed that enhanced visible light absorption, a reduced degree of free carrier recombination, rapid separation and transfer of photogenerated electrons and holes, and improved ·OH oxidation capacity were important factors contributing to the significantly enhanced photocatalytic activity. The S-doping method effectively improved the light absorption performance, electronic structure, and modulation band structure of CTF-1. This work highlights the potential application of low-cost metal-free catalysts driven by visible light for the removal of organic pollutants from wastewater.
Key words: Covalent triazine frameworks (CTFs); Photocatalysis; S-doping; Organic pollutant removal
1昆明理工大学， 省部共建非人灵长类生物医学国家重点实验室， 中国昆明市， 650500
2昆明理工大学生命科学与技术学院， 中国昆明市， 650500
3云南省灵长类生物医学重点实验室， 中国昆明市， 650500
4生物岛实验室， 中国广州市， 510005
5广州国家实验室， 中国广州市， 510005
摘要：尽管人们已经开发了多种构建人类多能干细胞的方法，但这些方法仍未应用在非人灵长类细胞中。在本文中，我们利用多样品标记单细胞测序技术对不同培养条件下的猴多能干细胞进行了分子特征的表征。结果表明，虽然用于重置人类干细胞的信号通路可以用来构建猴干细胞系，但其配方有待优化才能更好地维持猴干细胞多能性。总而言之，本研究证实了新型的人类干细胞培养体系可以转化到猴干细胞体系中，这对于未来猴干细胞系培养配方的探索具有指导意义。
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DOI:
10.1631/jzus.A2200440
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On-line Access:
2023-01-11
Received:
2022-09-12
Revision Accepted:
2022-10-14
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2023-01-13