在W18O49纳米线表面的单个原子合氧空缺,以构建不对称的活性位点增强过氧硫酸盐激活
Shumin Zhu1, Qingdong Ruan2, Xingwang Zhu3
1Institute for Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China.
Journal of colloid and interface science
|March 16, 2024
概括
这项研究引入了一种用于先进氧化过程的新型催化剂,显著提高过氧硫酸盐激活率,以有效净化水. 这种新材料加速了污染物的降解,为环境修复提供了一个有前途的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 催化剂是一种催化剂.
背景情况:
- 先进的氧化过程 (AOP) 依赖于活性氧物种 (ROS) 来降解污染物.
- 氧硫酸盐 (PMS) 激活对于在AOP中产生ROS至关重要,但在增强吸附和电子转移方面仍然存在挑战.
- 开发用于PMS激活的高效催化剂是改善净水技术的关键.
研究的目的:
- 设计和合成一种具有不对称活性中心的新型催化剂,以增强PMS激活.
- 使用设计的催化剂,研究PMS激活和ROS生成的机制.
- 评估催化剂在降解水中的微污染物的效率.
主要方法:
- 构建具有不对称的Co-Vo-W活性中心的封闭W18O49纳米线,具有表面丰富的氧空隙 (Vo) 和单原子 (Co).
- 在水净化过程中利用催化剂激活过氧硫酸盐 (PMS).
- 描述催化剂的结构和电子性质,并分析降解动力学和生成的基因物种.
主要成果:
- Co-W18O49催化剂显示出显著增强的吸附和激活PMS由于"电子喷泉头"效应由合氧空缺和单原子产生的显著增强吸附和激活.
- 催化剂有效地产生了各种各样的活性物种,包括硫酸盐基 (SO4•−),基基 (•OH),超氧化基 (•O2−) 和单片氧 (1O2).
- 由Co-W18O49降解的双甲 (BPA) 降解速度是单独由W18O49降解的32.6倍,超过其他过渡金属化催化剂的性能.
结论:
- 具有不对称活性中心的催化剂的合理设计,如Co-W18O49,有效地增强了AOPs的PMS激活.
- 开发的催化剂在降解微污染物方面表现出高效率,为水处理提供了潜在的解决方案.
- 这项工作提供了关于催化剂设计的见解,用于在环境应用中高效的界面电子传输和ROS生成.
相关概念视频
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
11.4K
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.
11.4K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
10.1K
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.
10.1K
Oxidative Cleavage of Alkenes: Ozonolysis
10.3K
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.
10.3K
Oxidation-Reduction Reactions
64.9K
Oxidation–Reduction Reactions
64.9K
Oxidation and Reduction of Organic Molecules
6.5K
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...
6.5K
Radical Oxidation of Allylic and Benzylic Alcohols
2.0K
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...
2.0K


