一个纳米封闭的FeCo2O4嵌入式陶膜调节过氧硫酸盐激活中的电子转移,以选择性地产生单片氧气用于清除水污染
Peng Xu1, Rui Wei1, Peng Wang1
1State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, P. R. China.
Environmental science & technology
|August 27, 2024
概括
在陶膜上纳米封闭FeCo2O4,可以促进过氧硫酸盐的激活,用于水处理. 这种工程系统可以选择性地产生单片氧,从而实现快速去除阿特拉津,并在先进的氧化过程中提高效率.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 基于氧硫酸盐 (PMS) 的先进氧化过程 (AOP) 对水的净化有希望,但由于选择性和质量转移不佳,其动力学较慢.
- 开发高效的催化剂和反应器设计对于增强PMS激活和污染物降解至关重要.
研究的目的:
- 设计一个纳米封闭的FeCo2O4嵌入式陶膜 (FeCo2O4-CM),以增强PMS激活和清除水污染.
- 研究纳米封闭在调节电子转移路径和选择性产生单片氧 (1O2) 中的作用.
主要方法:
- 使用受控纳米通道 (3.0-4.7 nm) 制造FeCo2O4-CM.
- 通过PMS激活和亚特拉 (ATZ) 降解的流动反应器设置.
- 使用DFT计算和实验方法对吸附相互作用和活性位点转化进行表征.
- 动力溶剂同位素实验和DPAO2分析证实了1O2.2.的作用.
主要成果:
- 与非封闭系统相比,纳米封闭显著增强了吸附相互作用和质量转移.
- 纳米封闭的FeCo2O4-CM通过调节活性位点 (Co(III)) 选择性地产生1O2.
- 在2.124ms内实现了100%的阿特拉津去除,速度常数超过非受限系统的5个数量级.
- 在14天内表现出优异的稳定性和适应pH值变化 (3.3-9.0) 和共存物质的弹性.
结论:
- 纳米封闭是一种有效的策略,通过增强质量转移和调节选择性1O2生成来促进PMS激活和污染物降解.
- 该FeCo2O4-CM系统提供了一个高效和稳定的平台,用于使用基于PMS的AOP进行水疗.
- 这种方法为控制在AOP中选择性激素生成的电子转移提供了洞察力,具有超出水处理范围的潜在应用.
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