| Autor: |
Hao Tan, Peng Kong, Riguang Zhang, Mengting Gao, Meixian Liu, Xianmo Gu, Weifeng Liu, Zhanfeng Zheng |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
The Innovation, Vol 2, Iss 1, Pp 100089- (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2666-6758 |
| DOI: |
10.1016/j.xinn.2021.100089 |
| Popis: |
Summary: The controlled generation of reactive oxygen species (ROS) to selectively epoxidize styrene is a grand challenge. Herein, cyano-group-modified carbon nitrides (CNCYx and CN-Ty) are prepared, and the catalysts show better performance in regulating ROS and producing styrene oxide than the cyano-free sample. The in situ diffuse reflectance infrared and density functional theory calculation results reveal that the cyano group acts as the adsorption and activation site of oxygen. X-ray photoelectron spectroscopy and NMR spectrum results confirm that the cyano group bonds with the intact heptazine ring. This unique structure could inhibit H2O2 and ⋅OH formation, resulting in high selectivity of styrene oxide. Furthermore, high catalytic activity is still achieved when the system scales up to 2.7 L with 100 g styrene under solar light irradiation. The strategy of cyano group modification gives a new insight into regulating spatial configuration for tuning the utilization of oxygen-active species and shows potential applications in industry. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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