洞察自由基和非激进路径的规范,用于清洁水的洞察
Yi Zhou1,2,3, Wenxuan Guo2, Yanpan Li2
1School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, China.
Nature communications
|August 20, 2025
概括
这项研究利用新型碳催化剂调节过氧硫酸盐 (PMS) 废水处理中的氧化途径. 定制含量和金属原子控制激进与非激进的过程,以有效地去除污染物.
科学领域:
- 环境科学 环境科学
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
背景情况:
- 控制激进和非激进途径对于有效的废水处理至关重要.
- 氧硫酸盐 (PMS) 氧化系统具有潜力,但需要优化的催化剂.
研究的目的:
- 研究PMS系统中激进和非激进氧化的调节.
- 开发用于增强废水处理的新型双金属单原子催化剂 (NC-FeMn(TA)).
- 了解物种和金属原子合并对催化路径的影响.
主要方法:
- 用控制的烧焦温度合成添加碳材料.
- 双金属单原子催化剂 (NC-FeMn(TA)) 的构建.
- 密度函数理论 (DFT) 计算和实验验证.
- 对NC-FeMn(TA) /PMS系统在不同pH值下降解污染物的性能评估.
主要成果:
- 化和单个金属原子有利于非激进氧化.
- 石墨/酸和双金属中心促进了激素氧化.
- 在22个循环中,NC-FeMn(TA) / PMS系统实现了目标污染物的100%降解.
- 观察到,新出现的污染物在5分钟内完全消失.
结论:
- 催化剂的设计,特别是含量和金属原子配置,有效调节氧化途径.
- 该NC-FeMn(TA) /PMS系统表现出高稳定性,广泛的pH适用性和抗干扰性.
- 这种先进的氧化过程显示出在控制水污染方面实际应用的巨大潜力.
更多相关视频
09:23A Protocol for Detecting and Scavenging Gas-phase Free Radicals in Mainstream Cigarette Smoke
Published on: January 2, 2012
19.5K
13:21Detection of Nitric Oxide and Superoxide Radical Anion by Electron Paramagnetic Resonance Spectroscopy from Cells using Spin Traps
Published on: August 18, 2012
19.1K
相关概念视频
Radical Reactivity: Overview
2.2K
Radicals, the highly reactive species, gain stability by undergoing three different reactions. The first reaction involves a radical-radical coupling, in which a radical combines with another radical, forming a spin‐paired molecule. The second reaction is between a radical and a spin‐paired molecule, generating a new radical and a new spin‐paired molecule. The third reaction is radical decomposition in a unimolecular reaction, forming a new radical and a spin‐paired...
2.2K
Radical Formation: Elimination
1.9K
Another method of radical formation is the elimination process. It is the opposite of the addition route and is driven by the instability of the radical. For example, as depicted in Figure 1, dibenzoyl peroxide yields a pair of unstable radicals upon homolysis. Given its instability, this radical spontaneously undergoes elimination via a C–C bond cleavage to form a relatively more stable phenyl radical. The mechanism involves cleavage of the bond between the α and β positions...
1.9K
Radical Autoxidation
2.2K
The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
2.2K
Radical Formation: Overview
2.2K
A bond can be broken either by heterolytic bond cleavage to form ions or homolytic bond cleavage to yield radicals. A fishhook arrow is used to represent the motion of a single electron in homolytic bond cleavage. There are two main sources from which radicals can be formed:
Radicals from spin-paired molecules:
Radicals can be obtained from spin-paired molecules either by homolysis or electron transfer. While two radicals are formed in the former, an electron is added in the...
Radicals from spin-paired molecules:
Radicals can be obtained from spin-paired molecules either by homolysis or electron transfer. While two radicals are formed in the former, an electron is added in the...
2.2K
Radical Reactivity: Nucleophilic Radicals
2.2K
Radicals adjacent to electron-donating groups are called nucleophilic radicals. These radicals readily react with electrophilic alkenes. The SOMO–LUMO interactions are the driving force for the reaction, where the high-energy SOMO of the electron-rich, nucleophilic radicals interacts with the low-energy LUMO of the electron-deficient, electrophilic alkenes. Such SOMO–LUMO interactions are the basis of reactive radical traps, affecting the selectivity in radical reactions. For...
2.2K
Radical Formation: Addition
1.8K
Radicals can be formed by adding a radical to a spin-paired molecule. This is typically observed with unsaturated species, where the addition of a radical across the π bond leads to the production of a new radical by dissolving the π bond. For example, the addition of a Br radical to an alkene yields a carbon-centered radical.
Similar to charge conservation in chemical reactions, spin conservation is implicit for radical reactions. Accordingly, the product formed must possess an...
Similar to charge conservation in chemical reactions, spin conservation is implicit for radical reactions. Accordingly, the product formed must possess an...
1.8K
