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Rapid Synthesis of Bismuth MOF @Carbon Nanotube Composite by microwave-assisted Solvothermal for Photodegrading RhB.
- Source :
-
Topics in Catalysis . Sep2024, Vol. 67 Issue 17/18, p1155-1168. 14p. - Publication Year :
- 2024
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Abstract
- We synthesized a bismuth-MOFs@CNTs (BiBTC@CNTs) catalyst using a microwave-assisted solvothermal method. The mass ratios of CNTs and BiBTC varied from 0 to 2, 5, and 10% (denoted as BiBTC@CNTs-x, x = 0 to 2, 5, and 10). The characteristics of the catalyst were determined by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and diffuse reflectance spectroscopy (UV-Vis DRS). The catalytic activity of the material was tested by photodegradation of rhodamine B. The structure of BiBTC@CNTs-x displayed a UU-200 and CNT structure with rod-shaped interweaving between the CNT fibers. The results indicated that BiBTC@CNTs-2 had the most significant ability to degrade RhB, achieving 98% degradation in 180 min. The increased separation of electron-hole pairs via a built-in electric field between CNT and BiBTC is responsible for the improved photocatalytic degradation of RhB, as observed in the XPS spectrum, transient photocurrent response, electrochemical impedance spectroscopy (EIS), and Mott-Schottky plots. In addition, the catalyst mass, dye concentration, pH of the medium, and radical scavengers were investigated. Furthermore, free radicals (O2−) and electrons (e-) played the primary and most influential role in the photocatalytic degradation of both dyes, with a minor contribution from the photogenerated holes (h+). Kinetic study of the dye degradation process followed a first-order kinetic model. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10225528
- Volume :
- 67
- Issue :
- 17/18
- Database :
- Academic Search Index
- Journal :
- Topics in Catalysis
- Publication Type :
- Academic Journal
- Accession number :
- 179069464
- Full Text :
- https://doi.org/10.1007/s11244-024-01985-x