配体辅助Ni(Ⅱ)离子印迹材料的制备及性能
Preparation and performance of ligand-assisted Ni(Ⅱ)ion-imprinted materials
付冬雪 1赵莉 1姚星月 1王琪 1成会玲1
作者信息
- 1. 昆明理工大学理学院,云南 昆明 650500
- 折叠
摘要
采用沉淀聚合法,以Ni(Ⅱ)离子为模板离子,邻氨基吡啶为配体,丙烯酰胺为功能单体,系统优化印迹条件,制备一系列Ni(Ⅱ)离子印迹聚合物Ni(Ⅱ)-IIP1-20及相应的非印迹聚合物Ni(Ⅱ)-NIP1-20.采用SEM(扫描电镜)、FT-IR(红外光谱)等对较优条件下制备的Ni(Ⅱ)-IIP3及Ni(Ⅱ)-NIP3进行结构表征,通过动力学吸附实验和等温吸附实验等进一步探究其吸附行为.结果表明:Ni(Ⅱ)-IIP3对Ni(Ⅱ)离子的平衡吸附量达109.48 mg/g,印迹因子为3.70,是典型的介孔材料.其表面存在吸附Ni(Ⅱ)离子的特异性印迹孔穴,吸附行为更符合准二级动力学模型和Freundlich等温吸附模型.此外,在"竞争离子"Co(Ⅱ)离子存在的条件下,Ni(Ⅱ)-IIP3对Ni(Ⅱ)离子仍具有较强的吸附能力和良好的吸附选择性,是一种性能优异的新型吸附材料.
Abstract
A series of Ni(Ⅱ)ion-imprinted polymers Ni(Ⅱ)-IIP1-20 and corresponding non-imprinted polymers Ni(Ⅱ)-NIP1-20 were prepared by precipitation polymerization method using Ni(Ⅱ)ion as template ion,o-aminopyridine as ligand,acrylamide as functional monomer,and the systematic optimization of imprinting conditions.The SEM(scanning electron microscopy)and FT-IR(fourier transform infrared)were used to structurally characterize Ni(Ⅱ)-IIP3 and Ni(Ⅱ)-NIP3 prepared under the preferred conditions,and their adsorption behaviors were further explored by kinetic adsorption experiments and isothermal adsorption experiments.The results show that the equilibrium adsorption of Ni(Ⅱ)-IIP3 on Ni(Ⅱ)ions reaches 109.48 mg/g with an imprinting factor of 3.70,which is a typical mesoporous material.The specific imprinted pores for adsorption of Ni(Ⅱ)ions exist on its surface,and the adsorption behavior is more in line with the quasi-secondary kinetic model and the Freundlich isothermal adsorption model.In addition,in the presence of"competing ions"Co(Ⅱ)ions,Ni(Ⅱ)-IIP3 still has strong adsorption capacity and good adsorption selectivity for Ni(Ⅱ)ions,which is a new type of adsorbent material with excellent performance.
关键词
Ni(Ⅱ)离子/沉淀聚合法/离子印迹聚合物/邻氨基吡啶Key words
Ni(Ⅱ)ion/precipitation polymerization method/ion imprinted polymer/o-aminopyridine引用本文复制引用
基金项目
国家自然科学基金资助项目(地区科学基金)(21764008)
出版年
2024
国家科技期刊平台
NSTL
万方数据