烯类反应
点击化学
化学
硫醇
印记(心理学)
介孔二氧化硅
吸附
分子印迹
基础(拓扑)
路易斯酸
组合化学
介孔材料
有机化学
化学工程
纳米技术
催化作用
选择性
材料科学
生物化学
数学分析
数学
工程类
基因
作者
Hongxing He,Siqing Ye,Weiye Zhang,S.J. Li,Zhifeng Nie,Xiaofei Xu,Weili Li,Abdukader Abdukayum,Wen‐Tong Chen,Guangzhi Hu
标识
DOI:10.1016/j.cej.2024.151294
摘要
The development of an environmentally friendly material for efficiently captures Pb(II) is crucial for human health and environmental preservation. In this investigation, we synthesized a magnetic mesoporous silica ion-imprinted polymer (IIP) using an efficient thiol-ene click reaction method. The maximum adsorption capacity reached 57.2 mg·g−1, with equilibrium achieved in just 14 min. Additionally, the IIP demonstrated high selectivity for Pb(II) in both simulated wastewaters and strongly acidic industrial wastewaters, with partition coefficients as high as 2444. The mechanism of Pb(II) capture by IIP was elucidated through a combination of density functional theory (DFT) and X-ray photoelectron spectroscopy (XPS). This selectivity is attributed to the strong attraction of imprinted sites originating from O atoms in the functional monomers. Furthermore, a strategy is proposed to regulate the Lewis alkalinity of imprinted sites using imprinted technology, based on the hard and soft acids and bases theory, offering a novel direction for the design of imprinted sites. It is noteworthy that IIPs can rapidly separate in the presence of a magnetic field and exhibit a tiny amount of Fe ion leakage in strongly acidic solutions, thereby presenting a wide range of practical applications.
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