4-硝基苯酚
乳状液
催化作用
多孔性
化学工程
结晶度
材料科学
二乙烯基苯
选择性催化还原
整体
化学
纳米颗粒
纳米技术
共聚物
复合材料
有机化学
苯乙烯
聚合物
工程类
作者
Jieyi Chen,Yu Gao,Shixiang Zuo,Huihui Mao,Xiazhang Li,Wenjie Liu,Chao Yao,Haoguan Gui
出处
期刊:Langmuir
[American Chemical Society]
日期:2024-01-31
卷期号:40 (6): 3024-3034
标识
DOI:10.1021/acs.langmuir.3c03200
摘要
A monolithic catalyst was fabricated through an emulsion-templating method, postpolymerization modification, and in situ loading of active constituents. To achieve a high specific surface area, divinylbenzene (DVB) was solely employed as the monomer, while the porous structure was adjusted with the porogen content and the types of initiators. Then, anchor points were introduced on the pore wall through nitration and amination of the polymeric scaffold. Using a controlled "silver mirror reaction", monolithic catalysts were obtained after loading of silver nanoparticles (Ag NPs), which was verified from morphological and crystallinity characteristics. The catalytic performance of the resultant monolithic catalyst was determined with the model reduction of 4-nitrophenol (4-NP). In static catalysis, the monolithic catalyst was proved to have a reactively high apparent rate constant and a good reusability. Furthermore, a flow reactor was fabricated with the monolithic catalyst, showing a high efficiency and long-term durability for the continuous reduction of 4-NP. This work broadened the adjustment of porous structures and the subsequent application for emulsion-templated monoliths.
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