通过 Fe 结合来调节 Co-O 键的共价性,可以实现有效的 peracetic 酸激活,用于持久净化水
Tianhao She1, Jimin Shen1, Jing Kang1
1State Key Laboratory of Urban-rural Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
Journal of hazardous materials
|December 4, 2025
概括
这项研究引入了一种新的催化剂,CuCo0.6Fe0.4O2,用于使用酸 (PAA) 的高级氧化过程 (AOP). 催化剂通过改善PAA激活和基因生成以有效去除污染物,显著增强了2,4,6-TCP的降解.
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:
- 使用酸 (PAA) 的高级氧化工艺 (AOP) 对于环境修复是有效的.
- 提高PAA激活和有机基生成对于有效降解污染物至关重要.
- 调节金属-氧键共价性提供了一条改善AOP催化性能的途径.
研究的目的:
- 开发一种新的催化剂,CuCo0.6Fe0.4O2,通过将Fe纳入CuCoO2来增强PAA激活.
- 为了研究CuCo0.6Fe0.4O2/PAA系统对2,4,6-TCP降解的催化性能.
- 阐明增强的催化活性背后的机制和合的作用.
主要方法:
- 通过将Fe纳入CuCoO2.2,合成CuCo0.6Fe0.4O2.
- 使用CuCo0.6Fe0.4O2/PAA系统对2,4,6-三二 (2,4,6-TCP) 降解的催化活性进行评估.
- 对表面电子结构,PAA吸附和激素生成机制的分析.
主要成果:
- 该CuCo0.6Fe0.4O2/PAA系统实现了2,4,6-TCP的97.2%降解,速度常数是CuCoO2/PAA的17倍.
- 铁的加入增加了Co2的比例,增强了PAA吸附 (ΔEads = -6.98 eV),并降低了电子转移阻力.
- 催化剂在连续运行中表现出91.3%的2,4,6-TCP去除,表明其实际可用性.
结论:
- 在CuCoO2中加入铁有效调节金属-氧键的共价性,显著增加PAA的激活和激素的形成.
- 该CuCo0.6Fe0.4O2/PAA系统表现出卓越的催化效率和稳定性,用于降解2,4,6-TCP.
- 这项研究为设计过渡金属氧化物提供了洞察力,通过精确的协同价值控制来有效去除污染物.
相关概念视频
Coagulation
1.2K
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
1.2K
Leveling Effect
1.3K
In acid-base chemistry, the leveling effect refers to the limitation imposed by the solvent on the strength of acids and bases in solution. When a base stronger than the solvent's conjugate base is used, it deprotonates the solvent until the base is entirely consumed, making it ineffective against weaker acids. Conversely, an acid stronger than the solvent's conjugate acid protonates the solvent until the acid is depleted, rendering it ineffective against weaker bases. Essentially, the...
1.3K
Precipitation and Co-precipitation
4.0K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
4.0K
Esters to Carboxylic Acids: Acid-Catalyzed Hydrolysis
3.9K
Hydrolysis of esters under acidic conditions proceeds through a nucleophilic acyl substitution. In the presence of excess water, the reaction proceeds in a reversible manner, forming carboxylic acids and alcohols.
During hydrolysis, the ester is first activated towards nucleophilic attack through the protonation of the carboxyl oxygen atom by the acid catalyst. The protonation makes the ester carbonyl carbon more electrophilic. In the next step, water acts as a nucleophile and adds to the...
During hydrolysis, the ester is first activated towards nucleophilic attack through the protonation of the carboxyl oxygen atom by the acid catalyst. The protonation makes the ester carbonyl carbon more electrophilic. In the next step, water acts as a nucleophile and adds to the...
3.9K
Leveling Effect and Non-Aqueous Acid-Base Solutions
9.3K
This lesson defines the leveling effect in acidic and basic solutions and its role in aqueous and non-aqueous solutions. It is essential to understand the competing nature of various species in a chemical system.
The Leveling Effect of a Solvent
A generic acid (HA) reacts with the generic base (B-) to yield the corresponding conjugate base (A-) and conjugate acid (HB):
The Leveling Effect of a Solvent
A generic acid (HA) reacts with the generic base (B-) to yield the corresponding conjugate base (A-) and conjugate acid (HB):
9.3K
Lewis Acids and Bases
47.9K
In 1923, G. N. Lewis proposed a generalized definition of acid-base behavior in which acids and bases are identified by their ability to accept or to donate a pair of electrons and form a coordinate covalent bond.
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
47.9K


