Covalent Organic Frameworks Enhance Photocatalytic Hydrogen Peroxide Production through Synergistic Effects

IF 11.3 1区化学 Q1 CHEMISTRY, PHYSICAL

ACS Catalysis Pub Date : 2025-03-24 DOI:10.1021/acscatal.4c08060

Lin Wang, Changzhi Han, Shiyong Gao, Jia-Xing Jiang, Yong Zhang

引用次数: 0

Abstract

Covalent organic frameworks (COFs) are promising photocatalytic materials due to their high crystallinity, ordered porous structures, and customizable functionality. However, their photocatalytic performance is often hampered by challenges such as charge carrier recombination and suboptimal reactant adsorption. In this study, we aim to enhance the photocatalytic hydrogen peroxide production performance by introducing fluorine atoms into the pore walls of an imine-bonded COF, synthesizing two imine-bonded COFs: HITMS-COF-20 and HITMS-COF-21. The high electronegativity and small atomic size of fluorine atoms significantly improve light absorption, exciton delocalization, charge-carrier separation, and oxygen molecule adsorption. Analyses revealed that fluorine doping reduces charge recombination and enhances oxygen activation, thereby improving hydrogen peroxide production efficiency. These findings provide important insights into the mechanism of photocatalytic hydrogen peroxide production in COFs and offer pathways for the design of advanced photocatalysts for chemical synthesis.

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来源期刊

ACS Catalysis CHEMISTRY, PHYSICAL-

CiteScore

20.80

自引率

6.20%

发文量

1253

审稿时长

1.5 months

期刊介绍： ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels. The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.