从Mn0.5Cd0.5S和Zeolitic Imidazolate框架ZIF-8通过连接体和离子交换合成的高度水稳定和高效的产生的异构结构
Renjie Ding1, Haifeng Zhu1, Jiashun Zhou1
1School of Science, China University of Petroleum, Qingdao 266580, China.
ACS applied materials & interfaces
|July 21, 2023
概括
为了高效的光催化生产,开发了高度水稳定的化物化物框架 (ZIF). 新型Mn0.5Cd0.5S@ZIF-8-MB异质连接显示了增强的性能和稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 光催化作用的光催化
- 纳米技术纳米技术
背景情况:
- 开发水稳定光催化剂用于生产至关重要.
- 石化模酸盐框架 (ZIF) 提供了潜力,但往往缺乏稳定性.
- 可见光驱动的光催化水解需要高效和耐用的催化剂.
研究的目的:
- 为光催化生产设计和合成高度水稳定的基于ZIF的异质连接.
- 研究合成后修改对催化剂性能和稳定性的影响.
- 阐明增强光催化活性和减少光腐蚀背后的机制.
主要方法:
- 易于合成Mn0.5Cd0.5S@ZIF-8异质连接的S@ZIF-8异质连接.
- 双重合成后的配体和离子交换 (PSE) 处理.
- 使用X射线光电子谱学 (XPS) 进行表征.
- 密度函数理论 (DFT) 的计算.
主要成果:
- 通过MCS@ZIF-8-MB催化剂实现了5.450mmol·g-1·h-1的气生产效率.
- 经过9个小时,表现出极好的稳定性,97.11%的保留率.
- XPS证实了接口形成,削弱了Mn0.5Cd0.5S.的光腐蚀.
- DFT计算显示,Mn (II) 增强了电子的吸引力,促进了电子的转移.
结论:
- 构建的Mn0.5Cd0.5S@ZIF-8-MB异构连接表现出优越的水稳定性和光催化生产效率.
- 合成后修饰是一种有效的策略,可以提高基于ZIF的光催化剂性能.
- 异质连接接口在改善催化剂耐用性和活性方面发挥着至关重要的作用.
相关概念视频
Hydrogen Bonds
8.7K
A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
8.7K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.4K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.4K


