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- Title
Enhancing visible-light-driven photocatalysis: unveiling the remarkable potential of H<sub>2</sub>O<sub>2</sub>-assisted MOF/COF hybrid material for organic pollutant degradation.
- Authors
Abeysinghe, Amila Kasun; Peng, Yen-Ping; Huang, Po-Jung; Chen, Ku-Fan; Chen, Chia-Hung; Chen, Wu-Xing; Liang, Fang-Yu; Chien, Po-Yen
- Abstract
In this study, we synthesized MOF/COF hybrid material (NH2-MOF-5/MCOF) by integrating NH2-MOF-5 (Zn) with a melamine-based COF (MCOF) to target the photocatalytic degradation of methylene blue (MB) dye. Characterization using SEM, XRD, XPS, FT-IR, and UV-DRS confirmed the synthesized MOF/COF hybrid's exceptional photocatalytic performance under visible light. The addition of H2O2 significantly enhanced the photocatalytic degradation, achieving removal rates of 90%, 92%, and 57% for 11.75 mg L−1, 30 mg L−1, and 83 mg L−1 of MB, respectively. Kinetic studies revealed first-order kinetics, with a rate constant nearly 3.5 times higher with added H2O2. We proposed a comprehensive photocatalytic mechanism elucidated through energy band structure analysis and scavenger tests. Our findings revealed the formation of a heterojunction between NH2-MOF-5 and MCOF, which mitigates electron–hole recombination, with ∙OH identified as the principal species governing methylene blue degradation. Moreover, the NH2-MOF-5/MCOF hybrid displayed excellent reusability and chemical stability over six cycles. Notably, this H2O2-assisted hybrid material demonstrated the removal of 99% of ibuprofen, a pharmaceutical drug, showcasing its broad applicability in removing organic contaminants in aqueous solutions, thereby holding great promise for wastewater treatment.
- Subjects
HYBRID materials; WASTEWATER treatment; CHEMICAL stability; PHOTODEGRADATION; ENERGY bands; METHYLENE blue
- Publication
Environmental Science & Pollution Research, 2024, Vol 31, Issue 38, p50983
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-024-34552-8