Institute of New Carbon Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China.
College of New Materials and New Energies, Shenzhen Technology University, Shenzhen, Guangdong, 518118, China.
Chemosphere. 2024 Jun;358:142151. doi: 10.1016/j.chemosphere.2024.142151. Epub 2024 Apr 26.
Herein, MXene-based composite aerogel (MXene-Fe aerogel) are constructed by a one-step freeze-drying method, using TiCT MXene layers as substrate material and ferrous ion (Fe) as crosslinking agent. With the aid of the Fe induced Fenton reaction, the synthesized aerogels are used as the particle electrodes to remove phenol from wastewater with three-dimensional electrode technology. Combined with the dual roles of Fe and the highly conductive MXene, the obtained particle electrode possesses extremely effective phenol degradation. The effects of experiment parameters such as Fe to MXene ratio, particle electrode dosage, applied voltage, and initial pH of solution on the removal of phenol are discussed. At pH = 2.5, phenol with 50 mg/L of initial concentration can be completely removed within 50 min at 10 V with the particle electrode dosage of 0.56 g/L. Finally, the mechanism of degradation is explored. This work provides an effective way for phenol degradation by MXene-based aerogel, which has great potential for the degradation of other organic pollutants in wastewater.
本文通过一步冷冻干燥法构建了基于 MXene 的复合气凝胶（MXene-Fe 气凝胶），以 TiCT MXene 层作为基底材料，亚铁离子（Fe）作为交联剂。在 Fe 引发的芬顿反应的帮助下，合成的气凝胶被用作粒子电极，通过三维电极技术去除废水中的苯酚。由于 Fe 和高导电性的 MXene 的双重作用，所获得的粒子电极对苯酚的降解具有极其有效的作用。讨论了实验参数，如 Fe 与 MXene 的比例、粒子电极剂量、施加电压和溶液初始 pH 值对苯酚去除效果的影响。在 pH=2.5 下，初始浓度为 50mg/L 的苯酚在 10V 下，以 0.56g/L 的粒子电极剂量，可在 50min 内完全去除。最后，探索了降解的机制。这项工作为基于 MXene 的气凝胶降解苯酚提供了一种有效的方法，对于降解废水中的其他有机污染物具有很大的潜力。
