氧化铁/石墨感觉阴极的激活潜力降低,通过在电化学芬顿式反应中引入Mn
Yalong Xu1, Weijian Li1, Jun Wang1
1School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China.
Chemosphere
|December 5, 2024
概括
将添加到氧化铁阴极中,通过增强过氧化硫酸盐 (PMS) 激活以降解阿特拉,显著降低了电化学高级氧化过程 (EAOP) 的能耗.
科学领域:
- 环境化学环境化学
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
背景情况:
- 电化学高级氧化工艺 (EAOP) 对于污染物降解是有效的,但由于高能耗而受到损害.
- 氧硫酸盐 (PMS) 激活是EAOP的一个关键步骤,阴极材料显著影响其效率.
- 阿特拉辛 (ATZ) 是一种持久性除草剂,需要有效的降解方法.
研究的目的:
- 为了合成Mn-Fe氧化物/石墨 (GF) 阴极,在EAOP中增强PMS激活.
- 评估引入对阴极活动,稳定性和ATZ降解的能量消耗的影响.
- 为了阐明参与降解过程的活性氧物种 (ROSs).
主要方法:
- 合成Mn-Fe氧化物/GF阴极通过现场还原和低温化.
- 评估PMS激活潜力 (ηmin) 和ATZ降解效率.
- 能源消耗分析和催化剂稳定性测试 (Fe 液).
- 使用火实验和电子磁共振 (EPR) 来识别ROS.
主要成果:
- 优化的Mn-Fe氧化物/GF阴极显著降低了PMS最小激活潜力 (ηmin).
- 与Fe氧化物/GF单独相比,随着Mn的引入,能源消耗减少了大约85.1%.
- 观察到增强的催化活性和稳定性,降低了Fe漏.
- 该EAOPs系统产生了多个ROS,包括基基 (•OH),硫酸盐基 (SO4•−),超氧化基 (O2•−) 和单片氧 (1O2).
结论:
- 在铁氧化物/铁氧化物阴极中加入有效地增强了EAOP中的PMS激活和ATZ降解.
- 添加Mn通过减少激活潜力,大大降低了EAOPs的能源需求.
- 本研究提出了一个可行的策略,用于开发高效和节能的催化材料,用于环境修复.
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