| 2 | Controllable Generation of Reactive Oxygen Species on Cyano-Group-Modified Carbon Nitride for Selective Epoxidation of Styrene显示文摘The controlled generation of reactive oxygen species(ROS)to selectively epoxidize styrene is a grand challenge.Herein,cyano-group-modified carbon nitrides(CNCY_(x) and CN-T_(y))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 H_(2)O_(2) 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. | Hao Tan Peng Kong Riguang Zhang Mengting Gao Meixian Liu Xianmo Gu Weifeng Liu Zhanfeng Zheng | 2021 | The Innovation2021，2，1： | 0 |
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