铜(Ⅱ)离子印迹聚合物的制备及其吸附性能研究

以铜离子为模板,以3-氨基丙基-三乙氧基硅烷为偶联剂,纳米TiO2/SiO2为载体,利用表面离子印迹技术,在纳米TiO2/SiO2表面聚合形成了铜离子印迹聚合物.详细研究了铜离子印迹聚合物的吸附性能和选择性.实验结果表明,与非印迹聚合物相比较,铜离子印迹聚合物对铜离子具有较好的识别性和选择性.铜离子印迹聚合物与非印迹聚合物的吸附量分别是36.51mg g-1和11.79mg g-1.该法的检出限为0.17ng mL-1,相对标准偏差为1.97%.将该印迹聚合物用于自来水、青海湖水和扎陵湖水中的铜离子的分离富集和测定,分析结果令人满意.

Applications on the Preparation of the Surface Cadmium Ion Imprinted Polymer

A Cu （II） ion imprinted nanometer TiO 2 /SiO2 composite material was prepared by surface imprinting technique using Cu（II） ion as the template ,3 - Aminopropyltriethoxysilane as the crosslinking agent ,nanometer TiO2 /SiO2 composite material as the carrier. With the traditional solid sorbents and non-imprinted polymer particles ,the ion-imprinted polymers （IIPs） had higher adsorption capacity and selec-tivity for Cu（II）. The maximum static adsorption capacity of the imprinted and non-imprinted sorbent for Cu（II） was 36.51mg g - 1 and 11.79mg g - 1 ,respectively. The detection limit of the method was 0.17ng mL - 1 and relative standard deviation of the eleven replicate determinations was 1.97 % . The method was applied in the determination of Cu（II） in Qinghaihu lake and zhalinghu lake water samples with satisfactory results.