引入FeOOH的氧空位上显著增强了芬顿式降解活动,通过活性物种之间的协同作用,引入了FeOOH
Shuang Tian1, Xiaowei Hu2, Dan Wei1
1College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, PR China.
Chemosphere
|February 28, 2026
概括
将氧空位 (OVS) 引入铁氧化 (FeOOH) 中,可显著提高其用于降解有机污染物的催化活性. 这种新的方法提高了过氧化的利用率,并采用了激进和非激进降解途径的协同作用.
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:
- 铁氧化 (FeOOH) 是一种广泛可用的,绿色的芬顿类催化剂.
- 它的应用受到低H2O2利用和依赖OH基的限制,导致有机污染物的降解不足.
研究的目的:
- 通过引入氧气空缺 (OVS) 来提高FeOOH的降解性能.
- 调查OVS对催化活性,H2O2效率以及降解机制的影响.
主要方法:
- 用不同度的氧空位合成FeOOH.
- 使用四环素作为模型污染物的催化降解实验.
- 对降解速度,矿化程度和涉及的基质物种的分析.
主要成果:
- 最优的FeOOH-OVS-200催化剂的降解率是原始FeOOH的2.96倍.
- 矿化程度增加了2.38倍.
- H2O2利用效率因Fe2+/Fe3+循环的增强而提高了2.37倍.
结论:
- 将氧气空缺引入FeOOH显著增强了其类似芬顿的催化活性.
- 改进的性能源于提升的H2O2效率和协同的OH和O2降解.
- 这一战略为设计用于环境修复的先进的芬顿式催化剂提供了一个有前途的途径.
更多相关视频
07:44Determining the Chemical Composition of Corrosion Inhibitor/Metal Interfaces with XPS: Minimizing Post Immersion Oxidation
Published on: March 15, 2017
16.2K
09:34Synthesis and Characterization of Fe-doped Aluminosilicate Nanotubes with Enhanced Electron Conductive Properties
Published on: November 15, 2016
9.7K
相关概念视频
Oxidative Cleavage of Alkenes: Ozonolysis
13.3K
In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
13.3K
Catalysis
31.1K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
31.1K
Radical Oxidation of Allylic and Benzylic Alcohols
3.0K
Activated manganese(IV) oxide can selectively oxidize allylic and benzylic alcohols via a radical intermediate mechanism. Primary allylic alcohols are oxidized to aldehydes, while secondary allylic alcohols yield ketones. The redox reaction of potassium permanganate with an Mn(II) salt such as manganese sulfate (under either alkaline or acidic conditions), followed by thorough drying, yields the oxidizing agent: activated MnO2. While MnO2 is insoluble in the solvents used for the reaction, the...
3.0K
Oxidation of Phenols to Quinones
5.0K
In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
5.0K
Radical Autoxidation
3.3K
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...
3.3K
Oxidation and Reduction of Organic Molecules
9.6K
Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
The removal of an electron from a molecule, results in a...
9.6K
