以MoS2为媒介的活性调节,以促进太阳能驱动的电-芬顿工艺中的Fe2+再生
Linsen Li1, Jiaqing Guo1, Kun Zheng1
1Hebei Key Laboratory of Public Health Safety, Ministry of Education & College of Public Health, Hebei University, Baoding 071002, PR China.
Journal of hazardous materials
|April 12, 2024
概括
这项研究通过使用装饰石墨 (GF) 阴极的二硫化 (MoS2) 增强了芬顿工艺. 这促进了铁的再生和基 (HO•) 的产生,以实现有效的废水处理.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 慢慢的Fe2+再生限制了芬顿工艺的效率.
- 传统的芬顿系统忽略了活性 (H*) 在Fe3+降解中的作用.
- 太阳能驱动的电-芬顿 (SEF) 工艺需要优化的阴极材料来提高性能.
研究的目的:
- 开发一种调节活性 (H*) 的策略,以增强SEF中的Fe2+再生.
- 为了研究二硫化物 (MoS2) 装饰石墨 (GF) 作为阴极的双功能作用.
- 提高基 (HO•) 生产和有机污染物降解效率.
主要方法:
- 用二硫化物 (MoS2) 装饰石墨 (GF) 阴极.
- 制造一个MoS2@GF阴极,用于太阳能驱动的电-芬顿 (SEF) 工艺.
- 使用了DFT计算和EPR实验来确认H*激活.
- 评估的Fe2+再生,HO•含量和有机降解率.
主要成果:
- MoS2@GF作为一个双功能阴极,同时产生H*和H2O2.
- 在6小时后,MoS2@GF-SEF系统中的Fe2+度是GF-SEF系统的17.89倍.
- 在MoS2@GF-SEF系统中,HO•含量和有机降解率分别是3.61倍和5.30倍.
- MoS2@GF系统在广泛的pH范围 (3-11) 和各种耐火有机化合物中表现出效率.
结论:
- 通过GF上的MoS2装饰进行H*调制,是一种增强Fe2+再生和HO•生产的实用策略.
- 摩斯2@GF阴极显著提高了太阳能驱动的废水处理电-芬顿工艺的效率.
- 这种太阳能系统为降解危险有机化合物和灭菌提供了一个有希望的,环保的解决方案.
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