| Autor: |
Ying-Lao Zhang, Mei Yang, Abhinav Kumar, Jun-Cheng Jin, Archisman Dutta, Cheng-Gen Xie |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Journal of the Taiwan Institute of Chemical Engineers. 129:410-417 |
| ISSN: |
1876-1070 |
| Popis: |
Background The photocatalytic activity of a series of UIO-66 modified MOFs viz. UiO-66-NO2 [ 1 ], UiO-66-NH2 [ 2 ] and UiO-66-NO2/UiO-66-NH2 [ 3 ] materials for photocatalytic degradation of model aromatic dye Rhodamine B [Rh B] have been assessed. Methods The photocatalysis experiments indicated that the most efficient photocatalyst for the Rh B degradation is 3 which achieved 95.5% degradation under UV light irradiation and displayed excellent recyclability and reusability when compared to 1 and 2. The trapping experiments indicated that O2˙− radical anion is main ROS generated during the photocatalysis play major role in the Rh B degradation. The LC-MS experiments and band gap calculations have been performed which suggested initial protection of xanthene unit and confirmed the major contribution of O2˙− radical anion generated by ligand to ligand transition in 3 for photodegradation of Rh B. Significant Findings This facile approach inculcating benefits of mixed ligands in multivariate metal-organic framework, lays a new pathway to design effective photocatalytic systems for safe and sustainable degradation of aromatic dyes. This strategy led to suppression in rate of hole-electron pair recombination that concomitantly uplifted photocatalytic efficiency over single component counterparts. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect