氧化物生产的共价有机框架光催化剂的加速合成和发现
Wei Zhao1,2, Peiyao Yan1, Boyu Li1
1Materials Innovation Factory and Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom.
Journal of the American Chemical Society
|May 31, 2022
概括
研究人员开发了一种用于光催化物的共价有机框架 (COF) 的新方法. 一个COF,sonoCOF-F2,有效地产生过氧化,但随着时间的推移而降解;然而,双相系统提高了其稳定性.
科学领域:
- 材料科学
- 化学学
- 催化剂
背景情况:
- 共价有机框架 (COF) 是光催化剂的有希望的材料.
- 开发高效和稳定的COF用于过氧化生产仍然是一个挑战.
研究的目的:
- 开发一种高通量声化学合成和测试策略,用于发现光催化剂的COF.
- 为了确定有效的光催化过氧化 (H2O2) 的新型COF.
- 在光催化应用中增强COF的光稳定性.
主要方法:
- 结合聚合物和COF的高通量声化学合成.
- 用水和氧进行光催化H2O2生产的合成COF的选.
- 在光催化条件下研究COF的长期稳定性和降解途径.
- 实施使用醇的双相催化系统以提高COF光稳定性.
主要成果:
- 合成了76种合聚合物,其中包括60种晶体COF (18种新).
- 确定 sonoCOF-F2 是一种不需要牺牲的 H2O2 生产的优秀光催化剂.
- 在96小时后,观察到因胺结合的sonoCOF-F2降解为胺结合的COF,其活性降低.
- 在双相系统中证明了 sonoCOF-F2 的增强光稳定性,使其能够稳定地产生 H2O2 超过一周.
结论:
- 一种新的声化学策略可以快速发现光催化剂的COF.
- sonoCOF-F2显示出产生H2O2的高潜力,但需要稳定.
- 一个双相系统显著提高光催化剂的光稳定性和寿命.
更多相关视频
08:42Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
Published on: July 10, 2017
13.6K
10:13A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
Published on: April 28, 2023
2.6K
相关概念视频
02:50Catalysis
27.7K
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.
27.7K
02:13Reduction of Alkenes: Catalytic Hydrogenation
12.6K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
12.6K
02:17Reduction 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