Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 612, Issue -, Pages 536-549Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.12.190
Keywords
Polyimide; Photocatalysis; Z-scheme heterojunction; Sulfonamides
Categories
Funding
- National Key Research and Development Program of China [2016YFD0201200, 2016YFD0201203]
- 2115 Talent Development Program of China Agricultural University
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Photocatalysis is a promising technology for water pollutant elimination. In this study, polyimide/NH2-UiO-66 composites were synthesized as photocatalysts for the degradation of sulfonamides. The optimized photocatalyst PU1.5 exhibited superior activity due to improved heterojunction and carrier separation efficiency.
Photocatalysis treatment is a promising technology to eliminate water pollutants. Herein, we constructed polyimide/NH2-UiO-66 composites (PUs) through a facile one-step solvothermal method for the photocatalytic degradation of sulfonamides. The optimized photocatalyst PU1.5 was superior to the photocatalysts prepared through multi-step methods due to the more exposed (001) facets of polyimide and the better distribution of small NH2-UiO-66 particles. PU1.5 showed the highest photocatalytic activity, which was 9.5 and 92.0 times higher than that of polyimide and NH2-UiO-66. Such improvement was attributed to the improved carrier separation efficiency resulted from direct Z-scheme heterojunction. The probable degradation pathway of sulfathiazole was proposed by the LC-MS/MS and Density Functional Theory (DFT) calculation. Furthermore, the reduced toxicity and the little antibacterial activity of intermediates was investigated by the Quantitative Structure-Activity Relationship (QSAR) analysis and the residual antibiotic activity experiment. The study might provide a new strategy for designing composite photocatalyst to achieve efficient removal of pollutants. (c) 2022 Elsevier Inc. All rights reserved.
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