Constructing a compact heterojunction structure of ag2co3/ag2o in-situ intermediate phase transformation decorated on zno with superior photocatalytic degradation of ibuprofen
In this study, the ZnO/Ag2CO3/Ag2O photocatalyst had been successfully fabricated via the facile two-step synthesis method, which included the heterojunction of Ag2CO3 on ZnO, followed by the in-situ phase transformation method of Ag2CO3/Ag2O. The phase transformation from Ag2CO3 to Ag2O over ZnO su...
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| Main Authors: | , , , , , |
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| Format: | Article |
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Elsevier B.V.
2020
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/93391/ http://dx.doi.org/10.1016/j.seppur.2020.117391 |
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| Summary: | In this study, the ZnO/Ag2CO3/Ag2O photocatalyst had been successfully fabricated via the facile two-step synthesis method, which included the heterojunction of Ag2CO3 on ZnO, followed by the in-situ phase transformation method of Ag2CO3/Ag2O. The phase transformation from Ag2CO3 to Ag2O over ZnO surfaces was observed in different phase structures and the O atom possessed by Ag2O had diffused towards the Ag2CO3 surface, signifying the presence of Ag2CO3/Ag2O heterostructure over the ZnO. The result indicates that the heterojunction of Ag2CO3/Ag2O over ZnO surfaces exhibited a 99.3% photodegradation of Ibuprofen (IBF) solution under visible-light irradiation, with 10-folds higher reaction rate compared to the pristine ZnO. Compact interfacial heterojunction in ZnO–Ag2CO3-Ag2O sample had promoted effective interfacial charge transfers due to synergistic effect of Ag2CO3/Ag2O heterostructure. This situation leads an extended light absorption due to light sensitive Ag2CO3 and Ag2O which can all lead to an improved photocatalytic activity of the ZnO/Ag2CO3/Ag2O. Experimental and characterization results have shown that a plausible mechanism of highlighting the surface of redox reaction and charge transfer pattern on ZnO/Ag2CO3/Ag2O had been attained. Hence, heterojunction with interface structure could be a promising photocatalyst for photocatalytic applications. |
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