Issue 6, 2024

Constructing a novel super-crosslinked triazine COF through molecular expansion for enhanced photocatalytic performance under visible light

Abstract

A novel hyper-crosslinked triazine-based COF (HCTF-2) photocatalyst was prepared by a simple molecular expansion method. Compared with CTF-2, HCTF-2 showed excellent photocatalytic performance under visible light irradiation. The photodegradation efficiency of HCTF-2 for some pollutants (20 ppm tetracycline (TC), 30 ppm rhodamine B (RhB), 20 ppm levofloxacin hydrochloride (LEF) and 20 ppm methylene blue (MB)) can reach more than 99% in a short time. Meanwhile, HCTF-2 had a stronger hydrogen production rate (2728.61 μmol h−1 g−1), which was 5.11 times higher than that of CTF-2 (534.12 μmol h−1 g−1). Molecular oxygen activation experiments confirmed that HCTF-2 exhibited strong oxidation capacity for 3,3′,5,5′-tetramethylbenzidine (TMB), and superoxide radical and hydrogen peroxide generation ability. The photodegradation active species were identified through free radical trapping experiments and ESR. Moreover, the possible degradation pathways of LEF were analyzed by liquid chromatography-mass spectrometry (LC-MS). The enhanced photocatalytic ability of HCTF-2 was attributed to the strong absorption of visible light and the porous braided structure leading to a larger specific surface area with higher carrier separation efficiency. This research provided a strategy for the development of specially structured COFs for photocatalytic applications and more efficient improvement of photocatalytic efficiency.

Graphical abstract: Constructing a novel super-crosslinked triazine COF through molecular expansion for enhanced photocatalytic performance under visible light

Supplementary files

Article information

Article type
Paper
Submitted
03 mar 2024
Accepted
09 apr 2024
First published
23 apr 2024

Environ. Sci.: Nano, 2024,11, 2591-2606

Constructing a novel super-crosslinked triazine COF through molecular expansion for enhanced photocatalytic performance under visible light

Y. Shao, D. You, Y. Wan, Z. Pan and Q. Cheng, Environ. Sci.: Nano, 2024, 11, 2591 DOI: 10.1039/D4EN00176A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements