膨润土
吸附
水溶液
化学
纳米复合材料
选择性吸附
朗缪尔吸附模型
选择性
X射线光电子能谱
分子印迹
无机化学
化学工程
核化学
有机化学
催化作用
工程类
作者
Cuizhen Wang,Shouxin Zhang,Guangzhu Zhou,Jun Qiu,Yin Liu,Rongchao Yang,Jingyi Chi,Jinpu Wang
标识
DOI:10.1016/j.jcis.2022.10.161
摘要
A novel reusable ion imprinted nanocomposite magnetic bentonite(IIPNMB) was prepared for selective recovery of aqueous scandium. Based on the fact that oxyphosphorus functional groups in sodium tripolyphosphate have good affinity to Sc(III) and chitosan is rich in hydroxy and amino active sites, they were chosen to build ion imprinted layers. Mesoporous IIPNMB showed good adsorption performance. The pseudo second-order kinetic model and Langmuir model fit the experimental data. According to XPS features, the amino, hydroxyl, PO and PO bonds of the adsorbents had electrostatic interaction and complexation with Sc(III), leading to the good selectivity of IIPNMB for Sc(III). In addition, the material atomic structure was proposed based on the chemical structure of IIPNMB for DFT calculation of ion imprinting adsorption, which clearly proved that the adsorption process of Sc(III) was stable, and it gave another proof for the mechanism of the selective extraction.
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