Metal-Free Fenton-like Photocatalysts Based on Covalent Organic Frameworks

16 March 2021, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


The Fenton reaction is one of the most efficient and widely used advanced oxidation processes for remediating the ever-growing water pollution. Metal-free photocatalysts for Fenton-like reactions have gathered enormous scientific interest for their advantages including board pH operation range and high stability. Herein, we demonstrate a metal-free covalent organic framework (COF)-based standalone photocatalyst with superior reactivity and reusability for Fenton-like reactions at acid and neutral pH solutions, which can be attributed to its large porosity, high density of the photoactive triazine moiety, vertical π arrays formed by eclipsed layer stacking and the β‑ketoenamine linkage. Our experiments showed that the photocatalyst can absorb visible light effectively for activation of H2O2, producing abundant reactive oxygen species including superoxide radical (O2·-), hydroxyl radical (·OH), and singlet oxygen (1O2) for oxidizing organic pollutants. This work not only provides an efficient metal-free photocatalyst for Fenton-like reactions, but also paves the way for COFs towards advanced oxidation processes, opening up the possibilities to their future applications in industry.


covalent organic frameworks
Fenton-like reaction
advanced oxidation process

Supplementary materials

supporting information


Comments are not moderated before they are posted, but they can be removed by the site moderators if they are found to be in contravention of our Commenting Policy [opens in a new tab] - please read this policy before you post. Comments should be used for scholarly discussion of the content in question. You can find more information about how to use the commenting feature here [opens in a new tab] .
This site is protected by reCAPTCHA and the Google Privacy Policy [opens in a new tab] and Terms of Service [opens in a new tab] apply.