Rapid Microwave Synthesis of Mesoporous Oxygen-Doped g-C3N4 with Carbon Vacancies for Efficient Photocatalytic H2O2 Production
| Autor: | Yixuan Wang, Zhang Weijie, Hang Xie, Jianjie Zhao, Xinli Guo, Yanmei Zheng, Zheng Zhang, Ying Huang, Yuanyuan Liu |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment General Chemical Engineering Oxalic acid Doping chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Oxygen 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Specific surface area Photocatalysis Environmental Chemistry 0210 nano-technology Mesoporous material Carbon Microwave |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 9:6788-6798 |
| ISSN: | 2168-0485 |
| DOI: | 10.1021/acssuschemeng.1c01012 |
| Popis: | Oxygen-doped g-C₃N₄ (CN) with carbon vacancies (O–CNC) was synthesized by microwave heating the mixture of melamine–cyanuric acid (MCA) supramolecular aggregates and oxalic acid for only 7 min. The as-synthesized O–CNC shows a mesoporous structure and exhibits a tunable band structure, optimized charge separation, and significantly enhanced two-electron reduction for H₂O₂ production. The photocatalytic H₂O₂ production rate reaches 2008.4 μmol h–¹ g–¹ under simulated sunlight irradiation, which is more than 4 times higher than that of pristine bulk CN. The enhanced photocatalytic performance is attributed to the synergistic effects of the mesoporous structure with a large specific surface area, doped oxygen atoms, and carbon vacancies. These results have provided a facile and efficient way for realizing the practical application of CN in photocatalytic H₂O₂ production. |
| Databáze: | OpenAIRE |
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