Visible light triggered exfoliation of COF micro/nanomotors for efficient photocatalysis
In: Green Energy & Environment, Jg. 8 (2023-04-01), S. 567-578
Online
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Zugriff:
We report a new facile light-induced strategy to disperse micron-sized aggregated bulk covalent organic frameworks (COFs) into isolated COFs nanoparticles. This was achieved by a series of metal-coordinated COFs, namely COF-909-Cu, -Co or -Fe, where for the first time the diffusio-phoretic propulsion was utilized to design COF-based micro/nanomotors. The mechanism studies revealed that the metal ions decorated in the COF-909 backbone could promote the separation of electron and holes and trigger the production of sufficient ionic and reactive oxygen species under visible light irradiation. In this way, strong light-induced self-diffusiophoretic effect is achieved, resulting in good dispersion of COFs. Among them, COF-909-Fe showed the highest dispersion performance, along with a drastic decrease in particle size from 5 μm to 500 nm, within only 30 min light irradiation, which is inaccessible by using traditional magnetic stirring or ultrasonication methods. More importantly, benefiting from the outstanding dispersion efficiency, COF-909-Fe micro/nanomotors were demonstrated to be efficient in photocatalytic degradation of tetracycline, about 8 times faster than using traditional magnetic stirring method. This work opens up a new avenue to prepare isolated nanosized COFs in a high-fast, simple, and green manner.
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Visible light triggered exfoliation of COF micro/nanomotors for efficient photocatalysis
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Autor/in / Beteiligte Person: | Feng, Kai ; Zhang, Liang ; Niu, Ran ; Gong, Jiang ; Qu, Jinping |
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Zeitschrift: | Green Energy & Environment, Jg. 8 (2023-04-01), S. 567-578 |
Veröffentlichung: | Elsevier BV, 2023 |
Medientyp: | unknown |
ISSN: | 2468-0257 (print) |
DOI: | 10.1016/j.gee.2021.09.002 |
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