催化作用
聚丙烯腈
4-硝基苯酚
化学
硝基苯酚
铵
选择性催化还原
阳离子聚合
盐(化学)
纳米颗粒
纤维
吡啶
高分子化学
有机化学
材料科学
纳米技术
聚合物
作者
Jian Xiao,Zhiying Wu,Kunlang Li,Zibo Zhao,Chunyan Liu
出处
期刊:RSC Advances
[The Royal Society of Chemistry]
日期:2022-01-01
卷期号:12 (2): 1051-1061
被引量:9
摘要
Ag(0) nanoparticles were immobilized on various pyridine salt, imidazole salt and quaternary ammonium functionalized polyacrylonitrile fibers (PANFs) to prepare Ag(0)-immobilized fiber catalysts. The catalytic activities of these immobilized catalysts for 4-nitrophenol (4-NP) reduction were detected. Among them, the quaternary ammonium fiber with butyl group immobilized Ag(0) nanoparticle catalyst PANQA-C4F-Ag(0) showed the best catalytic activity, and can effectively catalyze 4-nitrophenol (4-NP) reduction with a high conversation rate of 99.6%. Furthermore, PANQA-C4F-Ag(0) can be easily recovered, and it was reused 20 times with little decrease in catalytic activity and moderate Ag retention (53.5%). Notably, the cationic groups in the functionalized fibers can stabilize Ag(0) nanoparticles through electrostatic interactions and steric effects, and play an important role in phase transfer catalysis. Accordingly, possible mechanisms for the 4-NP reduction catalyzed by PANQA-C4F-Ag(0) were proposed.
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