Construction of rGO wrapping octahedral Ag-Cu2O heterostructure for enhanced visible light photocatalytic activity
| Autor: | Jiabin Liu, Yangfang Lu, Hongzhong Chi, Haiying Qin, Qi Wei, Fan Yang, Bin Zhou, Yang Wang, Jin-Ming Wu, Houlin Yu |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Graphene Process Chemistry and Technology Oxide Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences law.invention chemistry.chemical_compound chemistry Octahedron Chemical engineering law Photocatalysis Surface plasmon resonance 0210 nano-technology Ternary operation General Environmental Science Visible spectrum |
| Zdroj: | Applied Catalysis B: Environmental. 227:132-144 |
| ISSN: | 0926-3373 |
| Popis: | A ternary reduced graphene oxide wrapped octahedral Ag-Cu2O (Ag-Cu2O/rGO) photocatalyst has been synthesized through a facile one-pot water bath method at 55 °C. The ternary Ag-Cu2O/rGO composites possessed a novel heterostructure, in which Cu2O octahedra were decorated with dense Ag nanoparticles and were wrapped with thin rGO nanosheets. The ternary Ag-Cu2O/rGO photocatalyst exhibited much higher activity in photodegradations of phenol in water under visible light than either pure Cu2O or binary Cu2O/rGO or Ag-Cu2O composites. The photo-excited electrons from Cu2O transferred to rGO and Ag, leading to the separation of the electron-hole pairs. The incorporation of rGO not only suppressed the recombination of electron-hole pairs but also prevented the agglomeration of Ag nanoparticles. Ag nanoparticles played an important role in the photocatalysis owing to the surface plasmon resonance. |
| Databáze: | OpenAIRE |
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