A rational design of g-C3N4-based ternary composite for highly efficient H2 generation and 2,4-DCP degradation
| Autor: | Yang Yuan, Junhao Cao, Yahui Tian, Muhammad Humayun, Lang Shu, Abbas Khan, Qiuyun Fu, Wenbo Pi, Wei Luo, Zhiping Zheng |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Composite number Resonance 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Hydrothermal circulation 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Biomaterials Colloid and Surface Chemistry Chemical engineering law Photocatalysis Degradation (geology) 0210 nano-technology Electron paramagnetic resonance Ternary operation Visible spectrum |
| Zdroj: | Journal of Colloid and Interface Science. 599:484-496 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2021.04.049 |
| Popis: | In this work, g-C3N4 based ternary composite (CeO2/CN/NH2-MIL-101(Fe)) has been fabricated via hydrothermal and wet-chemical methods. The composite showed superior photoactivities for H2O reduction to produce H2 and 2,4-dichlorophenol (2,4-DCP) degradation. The amount of H2 evolved over the composite under visible and UV–visible irradiations is 147.4 µmol·g−1·h−1 and 556.2 µmol·g−1·h−1, respectively. Further, the photocatalyst degraded 87% of 2,4-DCP in 2 hrs under visible light irradiations. The improved photoactivities are accredited to the synergistic-effects caused by the proper band alignment with close interfacial contact of the three components that significantly promoted charge transfer and separation. The 2,4-DCP degradation over the composite is dominated by OH radical rather than h+ and O2 − as investigated by scavenger trapping experiments. This is further supported by the electron para-magnetic resonance (EPR) study. This work provides new directions for the development of g-C3N4 based highly efficient ternary composite materials for clean energy generation and pollution control. |
| Databáze: | OpenAIRE |
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