氧气/甲基改性碳化物作为有效的无金属光催化剂,通过过氧硫酸盐激活去除污染物
Xiaoying Yuan1, Yating Chen1, Wenqi Ruan1
1State Key Laboratory of Chemistry for NBC Hazards Protection, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, PR China.
Journal of colloid and interface science
|August 20, 2025
概括
一种新的无金属光催化剂,氧/甲基改性碳化物 (OMCN),在可见光下有效地激活过氧硫酸盐 (PMS),以完全去除. 这种可持续的水净化方法在连续流系统中具有很高的稳定性和有效性.
科学领域:
- 材料科学
- 环境化学
- 催化剂
背景情况:
- 无金属光催化剂对于通过过氧硫酸盐 (PMS) 激活的可持续水净化至关重要.
- 在这些系统中实现高效率仍然是一个重大挑战.
- 开发具有增强电子性能的新材料是改善PMS激活的关键.
研究的目的:
- 设计和合成一个高效的无金属光催化剂用于PMS激活.
- 研究氧和甲基修饰对碳化物的电子结构和催化性能的影响.
- 在可见光下使用开发的材料来评估类污染物的光催化降解.
主要方法:
- 简单的单热共聚尿素和二甲基酸盐以产生氧气/甲基改性碳化物 (OMCN).
- 包括内置电场和带隙在内的OMCN电子结构的特征.
- 使用可见光,PMS和污染物的光催化降解实验.
- 稳定性测试,pH耐受性评估和涉及激素检测的机械研究.
- 集成到连续流膜反应器中进行实际应用评估.
主要成果:
- 与未经修改或单独修改的化碳相比,合成的OMCN具有更强的内置电场和更窄的带隙.
- 优化的OMCN2表现出优异的可见光驱动的PMS激活,在90分钟内实现了完全的分解.
- 在四个循环后,催化剂保持了88. 1%的活性,显示出广泛的pH耐受性和稳定性.
- 硫酸盐基被确定为降解过程中的主导活性物种.
- 该系统有效地以205 L m-2 h-1的流量在连续流膜反应器中去除污染物.
结论:
- OMCN是一种高效,稳定且无金属的光催化剂,用于可见光驱动的PMS激活.
- 在OMCN中设计的内部电场显著增强了电荷分离和催化活性.
- 这项工作为可持续的水处理提供了先进的无金属光催化剂的合理设计策略.
相关概念视频
01:17Oxidation of Phenols to Quinones
3.4K
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...
3.4K
01:21Radical Oxidation of Allylic and Benzylic Alcohols
2.1K
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...
2.1K
02:21Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
13.0K
Alkenes can be dihydroxylated using potassium permanganate. The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
13.0K
02:37Oxidation of Alcohols
13.5K
In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
The process of oxidation in a chemical reaction is observed in any of the three forms:
The process of oxidation in a chemical reaction is observed in any of the three forms:
13.5K
01:46Oxidative Cleavage of Alkenes: Ozonolysis
11.1K
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.
11.1K
02:44Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
10.8K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.8K