多氨基含氮配体改性有序介孔材料的制备及对铀(Ⅵ)的吸附性能研究  

Preparation and adsorption of uranyl of multi-amino nitrogen ligands functionalized mesoporous silica materials

作　　者：张宗波[1] 袁亚莉[1] 周智慧[1] 文艺[1] 龙威[1] 李乐[1] 廖琪[1] 

机构地区：[1]南华大学化学化工学院,湖南衡阳421001

出　　处：《应用化工》2016年第4期603-607,共5页Applied Chemical Industry

基　　金：国家自然科学基金项目资助(11405081);湖南省科技厅项目(2014FJ6097)

摘　　要：利用溶胶-凝胶法制备了有序介孔材料MCM-41,并用四乙烯五胺对其进行修饰,制备了多氨基改性的介孔氧化硅吸附剂。采用低温氮吸附(BET)、扫描电镜(SEM)、红外光谱(IR)、X射线粉末衍射(XRD)对材料进行表征。BET比表面积为1 052 cm^2/g,孔容为1.194 m L/g,平均孔径为3.86 nm。当pH=5.2,吸附时间30 min,初始浓度120 mg/L时,吸附剂对铀酰离子的吸附达到454 mg/g。Mesoporous silica materials was prepared by a sol-gel method,multi-amine functionalized materials was obtained through adding tetraethylenepentamine（ TEPA） into mesoporous silica materials. The structure of TEPA-modified materials were characterized by infrared absorption spectrum（ IR） and scanning electron microscope（ SEM） and the X-ray diffraction（ XRD）. The total surface area is1 052 cm^2/ g,average pore diameter is 3.86 nm and a pore volume is 1. 194 m L/g. The aqueous solution of uranium best adsorption conditions were as follows： adsorption time of 30 min,p H of 5.2,the initial concentration is 120 mg/L,the maximum adsorption capacity is 454 mg/g.

关 键 词：氨基化 四乙烯五胺 铀(Ⅵ) 介孔材料 吸附 

分 类 号：TQ050.4[化学工程] O615.11[理学—无机化学]