期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 324, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2022.122217
关键词
CO2; Cyclic carbonate; Mechanochemical; Halogen-free; Organocatalyst
In this work, a mechanochemical method was used to fabricate mesoporous SiO2-supported organocatalysts with alkylol-amine cooperative sites. The catalysts showed medium to remarkable activity for the cycloaddition of CO2 and epoxides under halogen- and solvent-free conditions. The activity could be adjusted by controlling the pore size of SiO2 and the structure of organocatalysts. The SiO2-supported organocatalysts also exhibited easy recovery and recycling. This work not only provides an efficient method for constructing organic-inorganic hybrid materials, but also offers a halogen-free catalyst for CO2 conversion.
In this work, we demonstrated a mechanochemical method to quickly fabricate mesoporous SiO2-supported organocatalysts with alkylol-amine cooperative sites. The detailed characterizations of solid-state NMR, FTIR, XPS, TGA, as well as electron microscope confirmed that the organocatalysts were successfully grafted on the surface of SiO2 by mechanically ball-milling without any solvent. These SiO2-supported organocatalysts exhibit medium to remarkable activity for the cycloaddition of CO2 and epoxides under halogen- and solvent-free conditions, and the activity of the catalysts can be also adjusted by controlling the pore size of the support SiO2 and the structure of organocatalysts. Further mechanistic studies suggest that the good activity originates from the synergistic effect between the alkylol and amine sites. Furthermore, SiO2-supported organocatalysts can be easily recovered and recycled. This work not only provides an efficient method for the agile construction of multifunctional organic-inorganic hybrid materials, but also provides an alternative halogen-free catalyst for CO2 conversion.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据