聚丙烯腈
吸附
氟化物
化学工程
膜
静电纺丝
羧化
化学
纳米纤维
高分子化学
材料科学
无机化学
有机化学
聚合物
催化作用
生物化学
工程类
作者
Xin Chen,Wan Chen,Rui Yu,Lingpu Meng,Daoliang Wang,Wei Chen,Tao Duan,Liangbin Li
标识
DOI:10.1016/j.jhazmat.2021.125113
摘要
To deal with the drinking water safety caused by fluoride, a novel carboxylated polyacrylonitrile nanofibrous membrane (C-PAN NFM) is designed and fabricated massively for the first time by adopting synchronously biaxial stretching and carboxylation. The C-PAN NFM is composed of the layered stack structure by cross-linked nanofibers. Due to its high specific surface area, excellent hydrophilicity, a large amount of carboxyl and amine groups, C-PAN NFM owns high fluoride adsorption capacity and outstanding selectivity. Both the carboxylation and acid treatment of C-PAN NFM improved the fluoride adsorption capacity remarkably. Specifically, C-PAN NFM shows excellent reusability without secondary pollution. The fluoride adsorption behavior of C-PAN NFM is dominated by chemical adsorption, and the adsorption mechanism is mainly driven by hydrogen bonding and ion exchange. The mass-produced C-PAN NFM is a novel polyacrylonitrile-based porous membrane that shows a great application potential for fluoride removal with good efficiency and recyclability.
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