Frontier Institute for Research in Sensor Technologies (FIRST), The University of Maine, Orono, ME 04469, USA; Department of Mechanical and Materials Engineering, Wright State University, 3640 Colonel Glenn Hwy, Dayton, OH 45435, USA.
Department of Mechanical and Materials Engineering, Wright State University, 3640 Colonel Glenn Hwy, Dayton, OH 45435, USA.
Sci Total Environ. 2021 Apr 20;766:144109. doi: 10.1016/j.scitotenv.2020.144109. Epub 2020 Dec 24.
A flexible, durable, and reusable nanocatalyst system was fabricated by anchoring palladium nanoparticles on carbon nanotube (CNT) carpets covalently attached to carbon cloth. These hierarchical hybrid materials were tested for catalytic degradation of triclosan (TCS), an emerging contaminant. Materials were characterized using scanning & transmission electron microscopy techniques (SEM and TEM), X-Ray Diffraction (XRD), and X-Ray Photoelectron Spectroscopy (XPS). The reaction kinetics was studied using HPLC and reaction pathways proposed based on LC-MS/GC-MS analyses. In the presence of hydrogen, complete step-wise chlorine removal was seen until complete dechlorination was accomplished. The pseudo-first-order rate constant was measured to be orders of magnitude higher than earlier reported values. Moreover, the same material was usable for multiple cycles in flowing water. This study demonstrates that robustness and reusability of larger structural materials can be combined with the ultra-high surface activity of nanocatalysts to provide practical and eco-friendly solutions for water sustainability.
通过将钯纳米颗粒锚定在共价附着在碳布上的碳纳米管（CNT）地毯上，制备了一种灵活、耐用且可重复使用的纳米催化剂系统。这些分层杂化材料被用于催化降解三氯生（TCS），这是一种新兴污染物。使用扫描和透射电子显微镜技术（SEM 和 TEM）、X 射线衍射（XRD）和 X 射线光电子能谱（XPS）对材料进行了表征。使用 HPLC 研究了反应动力学，并根据 LC-MS/GC-MS 分析提出了反应途径。在氢气存在下，观察到氯的逐步完全去除，直到完成脱氯。测量的假一级速率常数比以前报道的值高出几个数量级。此外，相同的材料可在流动水中重复使用多个周期。这项研究表明，较大结构材料的坚固性和可重复性可以与纳米催化剂的超高表面活性相结合，为水的可持续性提供实用且环保的解决方案。
