化工新型材料

化工新型材料 ›› 2024, Vol. 52 ›› Issue (12) : 159-163. DOI: 10.19817/j.cnki.issn1006-3536.2024.12.008

科学研究

基于纳米TiO₂的Co(Ⅱ)离子印迹聚合物的制备及其性能研究

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Preparation and properties of Co(Ⅱ) ion-imprinted polymer based on nano-TiO₂

Luo Ganbin, Fu Dongxue, Hong Yuwen, Hu Bin, Zhao Li, Cheng Huiling

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Received		Published
2023-10-21		2024-12-20
Issue Date	Revised Date
2024-12-12	2023-10-21

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摘要

采用表面离子印迹技术,以Co(Ⅱ)离子为模板离子,双(2,4,4-三甲基戊基)次膦酸(Cyanex272)为配体,α-甲基丙烯酸(MAA)为功能单体,纳米TiO₂为载体,乙二醇二甲基丙烯酸酯(EGDMA)为交联剂,制备了21种Co(Ⅱ)离子印迹聚合物[Co(Ⅱ)-IIP_1-21@TiO₂]和相应的非印迹聚合物(NIP_1-21@TiO₂)。通过对印迹条件进行优化,得到最佳条件下制备的Co(Ⅱ)-IIP₃@TiO₂其吸附量为158.70mg/g,印迹因子为2.35。通过傅里叶变换红外光谱仪、氮气吸附-脱附实验和扫描电子显微镜对Co(Ⅱ)-IIP₃@TiO₂和NIP₃@TiO₂的表面形态和内部结构进行表征;结合等温吸附和动力学吸附实验,对Co(Ⅱ)-IIP₃@TiO₂的吸附行为进行分析。结果表明:Co(Ⅱ)-IIP₃@TiO₂对 Co(Ⅱ)离子的吸附以准二级动力学过程为主,符合Langmuir等温吸附模型,属于单分子层化学吸附。

Abstract

21 kinds of Co(Ⅱ) ion-imprinted polymers [Co(Ⅱ)-IIP_1-21@TiO₂] and the corresponding non-imprinted polymers (NIP_1-21@TiO₂) were synthesized by surface ion-imprinting technique,using Co(Ⅱ) ions as template ions,bis(2,4,4-trimethylpentyl)hypophosphite (Cyanex272) as a ligand,α-methyl methacrylate (MAA) as a functional monomer,nano-TiO₂ as a carrier,and ethylene glycol dimethacrylate (EGDMA)as a cross-linking agent.The imprinting conditions were optimized,resulting in Co(Ⅱ)-IIP₃@TiO₂ prepared under the optimal conditions with an adsorption amount of 158.70mg/g and an imprinting factor of 2.35.Fourier transform infrared spectroscopy (FT-IR),nitrogen adsorption/desorption experiments (BET) and scanning electron microscopy (SEM) were used to characterize the surface morphology and internal structure of Co(Ⅱ)-IIP₃@TiO₂ and NIP₃@TiO₂.Combining with isothermal adsorption and kinetic adsorption experiments,the adsorption behaviors of Co(Ⅱ)-IIP₃@TiO₂ were analyzed,and the results showed that the adsorption of Co(Ⅱ)-IIP₃@TiO₂ for Co(Ⅱ) ions was dominated by quasi-secondary kinetic processes,which was consistent with the Langmuir isothermal adsorption model,and belonged to the monomolecular layer chemisorption.

关键词

Co(Ⅱ)离子 / 表面印迹技术 / 配体 / 纳米TiO₂

Key words

Co(Ⅱ)ion / surface imprinting technique / ligand / nano-TiO₂

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基于纳米TiO₂的Co(Ⅱ)离子印迹聚合物的制备及其性能研究[J]. 化工新型材料, 2024, 52(12): 159-163 DOI:10.19817/j.cnki.issn1006-3536.2024.12.008

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