AI Article Synopsis
- The photocatalytic oxidation technique is highlighted as a promising solution to environmental pollution.
- A novel ternary nanocomposite, UiO-66(Ce)/Ag/BiOBr, was successfully created using a straightforward method and showed impressive photocatalytic efficiency, achieving 93.5% degradation of ketoprofen after 180 minutes of light exposure.
- The mechanism involves broadening light absorption, enhanced electron transfer due to cerium cycling, and improved charge transfer through a combination of plasmon resonance, Schottky junctions, and Ag bridging.
Article Abstract
Photocatalytic oxidation technique is considered as one of the most prospective approaches to solve the problem of environmental pollution. Herein, the novel ternary nanocomposite UiO-66(Ce)/Ag/BiOBr was fabricated via simple synthetic strategy. The obtained UiO-66(Ce)/Ag/BiOBr exhibited an excellent performance and photocatalytic efficiency of ketoprofen reached 93.5% after 180 min illumination. The ·OH and ·O were main active species and play an important role during the photocatalytic reaction. Furthermore, intermediate products and degradation pathways of ketoprofen were analyzed based on the 3D-EEM, DFT calculation and LC-MS. The possible reaction mechanism was proposed as follows: (1) the successful construction of heterojunction broadened the light absorption range to the visible light region; (2) the design of Ce-based MOFs provided more chances for electron transfer due to the Ce/Ce cycling; (3) the combination of plasmon resonance effect, Schottky junction and effect of Ag bridge was an important strategy to accelerate charge transfer and improve photocatalytic efficiency.
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| http://dx.doi.org/10.1016/j.chemosphere.2022.135352 | DOI Listing |
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