以氯化钾为晶体结构导向剂,以正硅酸乙酯和2-氰乙基三乙氧基硅烷为硅源,聚(乙二醇)-聚(丙二醇)-聚(乙二醇)三嵌段共聚物为模板剂,合成了偕胺肟基螯合氧化硅(AO-SBA-15).通过X射线衍射(XRD)、低温氮气吸附-脱附、傅里叶红外光谱(FT-IR)、Zeta电位分析和元素分析技术对样品的结构、孔性质和螯合官能团等进行了表征.XRD分析结果表明,偕胺肟基螯合氧化硅材料具有有序的二维六方结构,通过氮气物理吸附数据计算得到材料的平均孔径和比表面积分别为3.96 nm和435 m2/g.FT-IR分析表明将氰基成功地引入材料中并转化为偕胺肟基螯合官能团,元素分析发现材料的偕胺肟基含量约为1.6 mmol/g,此外,Zeta电位分析表明材料呈现电负性.相对未改性的氧化硅材料(SBA-15),AO-SBA-15对铜离子吸附容量提高了2倍;相对氰基功能化氧化硅(CN-SBA-15),AO-SBA-15吸附容量提高了3.6倍.这表明通过引入偕胺肟基螯合官能团,SBA-15对铜离子的亲和力得到显著提高.
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