| Autor: |
Fan Yang, Mingzhi Huang, Shiyu Zuo, Zeyu Guan, Dongya Li, Dongsheng Xia |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Carbon. 187:207-215 |
| ISSN: |
0008-6223 |
| DOI: |
10.1016/j.carbon.2021.11.022 |
| Popis: |
The action mechanism of pollutants in solar-water evaporation (SWE) is a crucial scientific issue in the utilization of sewage resources. A single-atom copper-carbon system (Cu/SA) was used for the first time in SWE for utilization of sewage resources. Experiments and theoretical calculations show that atomic-level dispersed Cu-N coordination promotes carrier orientation migration. Electron-rich Cu sites with high carrier concentrations can enhance the localized surface plasmon resonance (LSPR) and thus enhance the nonradiative relaxation energy release. The suitable adsorption energy of single-atom copper sites for H2O could effectively promote the evaporation of water. Benefiting from these effects, Cu/SA achieves a high water evaporation rate (3.325 kg/m2·h under 2 suns). The action mechanism of various pollutants in SWE is explored. The metal ions in sewage can be deposited by photogenerated electron reduction, which enhances the light absorption properties. Dyes with a visible light absorption capability can increase the light absorption performance. Electron-donating organics can facilitate water evaporation process by promoting photogenerated carrier separation. A variety of sewage can be effectively resourced to produce clean water. This study can provide a fundamental scientific understanding of the behavior mechanism of pollutants in SWE, thus providing viable technical support for wastewater resource utilization. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect