Novel MOFs-based ion-imprinted polymer for selective separation of cobalt ions from waste battery leaching solution
Novel MOFs-based ion-imprinted polymer for selective separation of cobalt ions from waste battery leaching solution
复制标题
新型基于MOFs的离子印迹聚合物用于从废电池浸出液中选择性分离钴离子
DOI：
10.1016/j.ica.2022.120922
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发表时间：
2022-03-23
影响因子：
2.8
通讯作者：
Yuan, Guoyuan
中科院分区：
文献类型：
--
作者：
Li, Jian;Li, Yanqiu;Yuan, Guoyuan
以UiO-66-（OH）2为模板分子，通过接枝2-吡啶甲醛（PCA），制备了一种新型金属有机骨架（MOF）钴离子印迹聚合物（MOF-IIP），用于从废电池浸出液中选择性分离钴离子。采用X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）、扫描电镜（SEM）和比表面积（BET）分析等手段对MOF-IIP的结构和性能进行了表征。通过X射线光电子能谱（XPS）探讨了吸附机理。结果表明，该吸附过程符合准二级动力学模型和Langmuir吸附等温式，为均相单分子层放热过程。在最佳条件下，MOF-IIP对Co（II）的最大吸附量为132.8mg/g，高于大多数印迹材料的吸附量。此外，MOF-IIP对Co（II）/Ni（II）、Co（II）/ Ca（II）、Co（II）/Li（I）和Co（II）/K（I）的选择性系数分别为1.20、4.61、78.40和3.71，这显著优于基于MOFs的非印迹聚合物（MOF-NIP;分别为0.35、3.54、24.9和3.00）。本研究以MOFs为基质，制备了一种选择性分离钴离子的印迹吸附剂。实验中获得的优异的吸附能力和选择性表明，基于MOFs的印迹材料在高选择性分离和回收金属离子方面具有很大的潜力。
A novel metal-organic framework (MOF)-based cobalt ion-imprinted polymer (MOF-IIP) was prepared by grafting 2-pyridinecarboxaldehyde (PCA) onto UiO-66-(OH)2 for the selective separation of Co(II) from waste battery leaching solution. The structure and property of MOF-IIP were characterised by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) analyses. The adsorption mechanism was explored by X-ray photoelectron spectroscopy (XPS). The adsorption performance was investigated based on batch adsorption experiments, and the results indicated that the adsorption conformed to the pseudo-second-order kinetic model and the Langmuir isotherm model, and that it was a homogeneous monolayer exothermic process. Under the optimal parameters, the maximum adsorption capacity of MOF-IIP for Co(II) was 132.8 mg/g, which is higher than the values reported for most imprinted materials. In addition, the selectivity coefficients of MOF-IIP for Co(II)/Ni(II), Co(II)/ Ca(II), Co(II)/Li(I), and Co(II)/K(I) were 1.20, 4.61, 78.40, and 3.71, respectively, which were significantly better than those of MOFs-based non-imprinted polymer (MOF-NIP; 0.35, 3.54, 24.9, and 3.00, respectively). In this study, MOFs were used as the matrix to prepare an imprinted adsorbent for the selective separation of cobalt ions. The outstanding adsorption capacity and excellent selectivity obtained in the experiments showed that MOFs-based imprinted materials have great potential for highly selective separation and recovery of metal ions.