Abstract
Reactive oxygen species (ROS) are one of the most useful chemicals in photo-therapeutic and catalytic applications. In order to effectively generate ROS, the role of light-absorbing photosensitizers or activators for pre-ROS sources like peroxymonosulfate (PMS) is significantly essential. Although metal-based ROS-generating materials have been widely utilized due to the affordable heavy atom effect or viable catalytic sites, the potential toxicity of leached metal ions can be sometimes an undesirable hazard to humans and ecosystems. Herein, we prepare a covalent organic framework (COF) that generates both type I and II ROS upon ultrasound irradiation. In addition, the COF effectively generated ROS through PMS activation even without light sources or catalytic metal sites. We also observed synergistic ROS generation by sonosensitization and PMS activation by the COF. This work is a demonstration of the COF material functioning as both a sonosensitizer and a PMS activator.
| Original language | English |
|---|---|
| Pages (from-to) | 9621-9628 |
| Number of pages | 8 |
| Journal | ACS Catalysis |
| Volume | 12 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - 2022 Aug 5 |
Bibliographical note
Funding Information:This work was supported by the National Research Foundation of Korea funded by the Ministry of Science and ICT (NRF-2021R1A2B5B03086313 and 2019R1A6A1A11044070 for C.S.H.; 2018R1A3B1052702 for J.S.K.; NRF-2019R1A6A1A10073079 for J.Y.L.). We appreciate Prof. Kwangyeol Lee for the TEM measurements and Dr. Hyung Jong Kim and Prof. Dong Hoon Choi for the CV measurements.
Publisher Copyright:
© 2022 American Chemical Society.
Keywords
- PMS activation
- covalent organic frameworks
- meta-free catalyst
- reactive oxygen species
- sonosensitization
ASJC Scopus subject areas
- Catalysis
- General Chemistry