| Autor: |
Da Wang, Yinning He, Yi Chen, Fan Yang, Zhiqiao He, Tao Zeng, Xiaohui Lu, Lizhang Wang, Shuang Song, Jun Ma |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Water research. 230 |
| ISSN: |
1879-2448 |
| Popis: |
In this study, manganese oxide (MnO) dispersed on CN (Mn-nCN) was fabricated as a catalyst in heterogeneous catalytic ozonation (HCO), achieving excellent catalytic performance on refractory organic pollutant degradation via the synergistic effects between MnO and CN. The study demonstrated that the C-N-Mn and C-O-Mn bonds constructed in the catalyst linking MnO and CN created the synergistic effects which could overcome typical problems, such as metal leaching etc. The C-N-Mn and C-O-Mn bonds could promote electron transfer from cation-π reactions to form electron-rich Mn(II) sites and electron-poor CN sites. The electron-rich Mn(II) sites as active sites supplied electrons to ozone which then further evolved into reactive oxygen species (ROS). The electron-poor CN sites captured electrons from the pollutant intermediate radicals to electron-rich Mn(II) sites via cation-π reactions with the help of C-N-Mn and C-O-Mn bonds, which promote the redox reactions of Mn. The surface hydroxyl groups also participated in ozone decomposition and ROS production. Additionally |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect