Issue 6, 2024

Donor–acceptor sp2 covalent organic frameworks for photocatalytic H2O2 production and tandem bisphenol-A degradation

Abstract

Covalent organic frameworks (COFs) emerge as innovative photocatalysts featuring systematically tuned chemical structures, nano-porosity, and photoelectric properties. We have shown in the last years that COFs are excellent photocatalysts and they are able to produce hydrogen peroxide (H2O2) from oxygen and water. Despite the recent surge in the photosynthesis of H2O2 using COFs, its subsequent application for tandem pollutant remediation as a tangible green alternative to Fenton chemistry has not yet been comprehensively explored. In this study, we synthesized three highly crystalline sp2 COFs with different donor–acceptor (D–A) strengths, employing triazine units as the electron acceptor moiety. The D–A alignment promotes photogenerated charge separation, augmenting the photocatalytic process, which resulted in the TMT-TT-COF achieving a H2O2 production rate of 1952 μmol g−1 h−1 without any sacrificial agents. The COFs also manifested a rapid photocatalytic degradation of bisphenol A (BPA) from a variety of real-life waterbodies. This study pioneers the in situ H2O2 production via COFs to subsequently generate other reactive oxygen species (ROS) for direct organic pollutant degradation in the visible region.

Graphical abstract: Donor–acceptor sp2 covalent organic frameworks for photocatalytic H2O2 production and tandem bisphenol-A degradation

Supplementary files

Article information

Article type
Paper
Submitted
23 Oct 2023
Accepted
29 Jan 2024
First published
30 Jan 2024
This article is Open Access
Creative Commons BY license

Green Chem., 2024,26, 3239-3248

Donor–acceptor sp2 covalent organic frameworks for photocatalytic H2O2 production and tandem bisphenol-A degradation

M. Deng, L. Wang, Z. Wen, J. Chakraborty, J. Sun, G. Wang and P. Van Der Voort, Green Chem., 2024, 26, 3239 DOI: 10.1039/D3GC04045C

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