钼酸根阴离子印迹陶瓷膜的制备与吸附性能

发布时间：2018-05-14 13:26

  本文选题：陶瓷膜 + 钼酸根阴离子　； 参考：《高等学校化学学报》2017年11期

【摘要】：以三氧化二铝陶瓷膜为载体,以钼酸根阴离子为模板离子,1-乙烯基咪唑为功能单体,1,6-二溴己烷为交联剂,采用表面印迹和接枝聚合方法制备了能选择性吸附Mo(Ⅵ)的新型印迹陶瓷膜(IIP-PVI/CM).采用红外光谱、X射线光电子能谱、热重分析及扫描电子显微镜等方法对陶瓷膜进行结构表征.研究了pH值对吸附性能的影响,当pH值范围为2~4时,IIP-PVI/CM具有良好吸附能力;动力学和热力学结果表明,IIP-PVI/CM对Mo(Ⅵ)的吸附符合准二级动力学模型和Langmuir吸附模型;当pH=4.0和温度为30℃时,IIP-PVI/CM对Mo(Ⅵ)具有良好选择性,Mo(Ⅵ)对W(Ⅵ)的选择性系数高达7.48;动态吸附结果表明,IIP-PVI/CM对W(Ⅵ)和Mo(Ⅵ)的吸附饱和时间分别为24和47 min,饱和吸附量分别为0.163和0.672 mmol/100 g,动态吸附时IIP-PVI/CM亦具有良好选择性;经9次吸附与解吸后,IIP-PVI/CM对Mo(Ⅵ)吸附容量仍可达到初始值的92%,再生和循环使用性能良好.
[Abstract]:Aluminum trioxide ceramic membrane was used as carrier, and molybdate anion as template ion, 1-vinylimidazole as functional monomer, 1-dibromohexane as crosslinking agent. A novel imprinted ceramic membrane, IIP-PVI / CMN, was prepared by surface imprinting and graft polymerization. The structure of the ceramic film was characterized by X-ray photoelectron spectroscopy, thermogravimetric analysis and scanning electron microscope. The effect of pH value on the adsorption performance was studied. The adsorption ability of IIP-PVI / CM was found to be good when pH was in the range of 2 ~ 4, and the results of kinetics and thermodynamics showed that the adsorption of Mo (鈪，

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