Madkhali Osama
Department of Physical Sciences, Physics Division, College of Science, Jazan University, P.O. Box. 114, Jazan 45142, Kingdom of Saudi Arabia.
Langmuir. 2024 Sep 3;40(35):18525-18534. doi: 10.1021/acs.langmuir.4c01772. Epub 2024 Aug 19.
The escalating concerns over water pollution and antimicrobial resistance have underscored the urgency of effective antibiotic degradation. Photocatalytic degradation offers a promising solution due to its efficiency and environmental friendliness. In this study, I synthesized a novel nanocomposite comprising WSe and polypyrrole (PPy) via a hydrothermal method coupled with polymerization for the degradation of nitrofurazone antibiotics. The WSe/PPy nanocomposite demonstrated significantly higher photocatalytic degradation efficiency (94.50%) compared to pure WSe and PPy, with degradation efficiencies of 23.07% and 32.96%, respectively. The degradation was performed at different pH values, with acidic conditions proving the most suitable for nitrofurazone degradation. The photocatalytic degradation efficiencies at pH 2, 3, 5, 7, 9, and 11 were 98.5%, 98.3%, 85.4%, 78.02%, 61.4%, and 61%, respectively. The acidic conditions were found to be the most suitable for nitrofurazone degradation. The nanocomposite's improved efficiency was ascribed to its low recombination rate and quick charge transfer, as demonstrated by time-resolved photoluminescence (TRPL) and electrochemical impedance spectroscopy (EIS) tests, respectively. The Z-Scheme photocatalysis mechanism as proposed for the WSe-PPy nanocomposite and supported by scavenger experiments. Moreover, the nanocomposite demonstrated excellent reusability, which enhanced its practical applicability.
对水污染和抗生素耐药性的担忧日益加剧，凸显了有效降解抗生素的紧迫性。光催化降解因其高效性和环境友好性提供了一个有前景的解决方案。在本研究中，我通过水热法结合聚合反应合成了一种包含WSe和聚吡咯（PPy）的新型纳米复合材料，用于呋喃西林抗生素的降解。与纯WSe和PPy相比，WSe/PPy纳米复合材料表现出显著更高的光催化降解效率（94.50%），纯WSe和PPy的降解效率分别为23.07%和32.96%。降解在不同pH值下进行，结果表明酸性条件最适合呋喃西林降解。在pH 2、3、5、7、9和11时的光催化降解效率分别为98.5%、98.3%、85.4%、78.02%、61.4%和61%。发现酸性条件最适合呋喃西林降解。分别通过时间分辨光致发光（TRPL）和电化学阻抗谱（EIS）测试表明，纳米复合材料效率的提高归因于其低复合率和快速电荷转移。WSe-PPy纳米复合材料提出的Z-型光催化机理得到了清除剂实验的支持。此外，该纳米复合材料表现出优异的可重复使用性，增强了其实际应用价值。
