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Preparation and Adsorption Properties of Lanthanum Ion MCM-41 Imprinted Polymers
Journal of Inorganic and Organometallic Polymers and Materials ( IF 3.9 ) Pub Date : 2019-09-19 , DOI: 10.1007/s10904-019-01318-6
Liu Xiaogang , Cheng Yuwen , Wang Xiu , Tian Minglei , Li Xiancai , Yang Yifeng

Using 3-chloropropyltriethoxysilane as an anchor, the functional monomer linear polyethylenimine(PEI) was grafted on the surface of mesoporous MCM-41. La3+ was selected as the template ion and epichlorohydrin was used as the crosslinker. A lanthanum ion MCM-41 imprinted polymer (La(III)-IIP-PEI/MCM-41) was prepared, and a non-ion-imprinted polymer (NIP-PEI/MCM-41) was arranged in the same manner. The La3+ surface imprinted polymer was characterized by means of infrared spectrometer, thermogravimetric(TG) analyzer, and scanning electron microscope(SEM). The optimal adsorption conditions and selective adsorption properties of La(III)-IIP-PEI/MCM-41 for La3+ were determined by static adsorption method and adsorption performance. Experiments show that the maximum adsorption capacity of La(III)-IIP-PEI/MCM-41 can reach 212.69 mg g1. Adsorption equilibrium can be reached at 30 min. Quasi-second-order kinetic model can be used to describe its adsorption mechanism. La(III)-IIP-PEI/MCM-41 also has a strong selectivity for La3+.

中文翻译:

镧离子MCM-41印迹聚合物的制备及吸附性能

以3-氯丙基三乙氧基硅烷为锚定剂,将功能性单体线性聚乙烯亚胺(PEI)接枝在介孔MCM-41表面。选择La 3+作为模板离子,并使用环氧氯丙烷作为交联剂。制备了镧离子MCM-41印迹聚合物(La(III)-IIP-PEI / MCM-41),并且非离子印迹聚合物(NIP-PEI / MCM-41)以相同的方式排列。利用红外光谱仪,热重分析仪和扫描电子显微镜对La 3+表面印迹聚合物进行了表征。La(III)-IIP-PEI / MCM-41对La 3+的最佳吸附条件和选择性吸附性能用静态吸附法和吸附性能测定。实验表明,La(III)-IIP-PEI / MCM-41的最大吸附量可达212.69 mg g 1。30分钟即可达到吸附平衡。准二级动力学模型可以用来描述其吸附机理。La(III)-IIP-PEI / MCM-41对La 3+也具有很强的选择性。
更新日期:2019-09-19
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