Issue 7, 2022

Rational design of covalent organic frameworks for efficient photocatalytic hydrogen peroxide production

Abstract

Hydrogen peroxide (H2O2) is an important chemical for environmental applications and also used in large-scale industrial processes. Recent studies have demonstrated photocatalytic production of H2O2, but the observed production rates are low, making the materials unpractical for applications at scale. Herein, covalent organic frameworks (COFs) have been studied as photocatalysts for H2O2 production. Two related COFs show markedly different performances, which can be explained by the presence of donor–acceptor configurations in the backbone. N0-COF has increased charge-separation efficiencies and a better band alignment compared to its nitrogen containing analogue N3-COF. The result is that N0-COF has a H2O2 production rate of 15.7 μmol h−1 for 10 mg, which is ten times higher compared to N3-COF. In this study, both experimental and theoretical studies have been used to understand the improved performance. This study reveals the importance of the backbone design of metal-free materials for advanced photocatalytic applications.

Graphical abstract: Rational design of covalent organic frameworks for efficient photocatalytic hydrogen peroxide production

Supplementary files

Article information

Article type
Paper
Submitted
12 fev 2022
Accepted
30 may 2022
First published
31 may 2022

Environ. Sci.: Nano, 2022,9, 2464-2469

Rational design of covalent organic frameworks for efficient photocatalytic hydrogen peroxide production

S. Chai, X. Chen, X. Zhang, Y. Fang, R. S. Sprick and X. Chen, Environ. Sci.: Nano, 2022, 9, 2464 DOI: 10.1039/D2EN00135G

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