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以纳米二氧化钛为载体的Ag(I)表面印迹聚合物的制备及应用

发表时间:2016-04-15  浏览量:1941  下载量:768
全部作者: 刘彦雄,刘笑岚,谭文祥,刘鹏,曹秋娥
作者单位: 云南大学化学科学与工程学院
摘 要: 基于软硬酸碱理论,选择了主要以N为配位原子的烯丙基脲(NAU)为功能单体,在系统优化了功能单体、纳米二氧化钛和交联剂用量的基础上,采用0.1 mmol Ag(I)为模板,50 mg纳米二氧化钛为载体,0.3 mmol烯丙基脲为功能单体,3 mmol乙二醇二甲基丙烯酸酯(EGDMA)为交联剂,以表面印迹技术制备了一种Ag(I)离子印迹聚合物(ion-imprinted polymer,IIP)。该印迹聚合物在10 mL含有50 mg/L的Ag(I)水溶液中对Ag(I)的平衡吸附量为34.16 mg/g,印迹因子为1.94,用其制备的固相萃取小柱在优化的萃取条件下,对Ag(I)的萃取率达到了78%,而对Ir(IV)、Pd(II)、Ru(III)、Rh(III)、Au(III)和Cu(II)的萃取率均在15%以下。
关 键 词: 分析化学;Ag(I);离子印迹聚合物;表面印迹技术;纳米二氧化钛;固相萃取
Title: Preparation of Ag(I) surface imprinted polymer with nano-titanium dioxide as supporter and its applications
Author: LIU Yanxiong, LIU Xiaolan, TAN Wenxiang, LIU Peng, CAO Qiue
Organization: School of Chemical Science and Technology, Yunnan University
Abstract: Based on the soft and hard acid and alkali theory, N-allylthiourea (NAU), which can use N as coordination atom, was selected as functional monomer for the preparation of Ag(I) ion-imprinted polymer (IIP). After the amounts of functional monomer, cross-linking agent and nano-titanium dioxide were optimized, a Ag(I) ion-imprinted polymer was obtained by surface imprinting technique with 0.1 mmol Ag(I) as template, 0.3 mmol NAU as functional monomer, 50 mg nano-titanium dioxide as supporter, and 3 mmol ethylene glycol dimethacrylate (EGDMA) as crosslinker. The adsorption capacity and imprinting factor of this IIP in 10 mL of aqueous solutions containing 50 mg/L Ag(I) were 34.16 mg/g and 1.94, respectively. The obtained IIP could be used as adsorbent for solid phase extraction of Ag(I). After the extraction conditions was optimized, the solid phase extraction based Ag(I) ion-imprinted polymers exhibited good selectivity to Ag(I) over the other metals such as Ir(IV)、Pd(II)、Ru(III)、Rh(III)、Au(III) and Cu(II). The extraction percentage for Ag(I) could reach to above 78% and those for the other metals were below 15%.
Key words: analytical chemistry; Ag(I); ion-imprinted polymer; surface imprinting technique; nano-titanium dioxide; solid phase extraction
发表期数: 2016年4月第7期
引用格式: 刘彦雄,刘笑岚,谭文祥,等. 以纳米二氧化钛为载体的Ag(I)表面印迹聚合物的制备及应用[J]. 中国科技论文在线精品论文,2016,9(7):739-745.
 
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