膜
氢键
选择性
渗透
共价键
化学
离子
萃取(化学)
氢
离子键合
分析物
化学工程
有机化学
分子
色谱法
催化作用
生物化学
工程类
作者
Qingwei Meng,Shao-Chun Wu,Mingjie Liu,Qing Guo,Weipeng Xian,Xiuhui Zuo,Sai Wang,Hong Yin,Shengqian Ma,Qi Sun
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2023-06-23
卷期号:9 (25)
被引量:4
标识
DOI:10.1126/sciadv.adh0207
摘要
Acids are extensively used in contemporary industries. However, time-consuming and environmentally unfriendly processes hinder single-acid recovery from wastes containing various ionic species. Although membrane technology can overcome these challenges by efficiently extracting analytes of interest, the associated processes typically exhibit inadequate ion-specific selectivity. In this regard, we rationally designed a membrane with uniform angstrom-sized pore channels and built-in charge-assisted hydrogen bond donors that preferentially conducted HCl while exhibiting negligible conductance for other compounds. The selectivity originates from the size-screening ability of angstrom-sized channels between protons and other hydrated cations. The built-in charge-assisted hydrogen bond donor enables the screening of acids by exerting host-guest interactions to varying extents, thus acting as an anion filter. The resulting membrane exhibited exceptional permeation for protons over other cations and for Cl- over SO42- and HnPO4(3-n)- with selectivities up to 4334 and 183, respectively, demonstrating prospects for HCl extraction from waste streams. These findings will aid in designing advanced multifunctional membranes for sophisticated separation.
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