双功能性离子液体溶胶-凝胶法制备介孔SiO_2  

Bifunctional ionic liquid as template in the preparation of mesoporous silica via a sol-gel method

作　　者：葛倪林 张迪[1] 魏海兵[1,2] 丁运生[1,2] 

机构地区：[1]合肥工业大学化学工程学院,高分子材料与化工研究所,合肥230009 [2]先进功能材料与器件安徽省重点实验室,合肥230009

出　　处：《功能材料》2014年第20期20068-20073,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51373045)

摘　　要：首先合成了一种新型双功能性离子液体1-甲基-3-(3'-磺酸丙基)咪唑十二烷基磺酸盐([PMIM(SO3H)][C12SO3]),并采用FT-IR、1H NMR和13C NMR对其结构进行了表征;进一步以该离子液体为模板剂和酸源,以正硅酸乙酯(TEOS)为硅源,通过溶胶-凝胶法制备出介孔SiO2,利用TGA和FT-IR研究了介孔材料的形成过程,采用SAXRD、SEM、TEM和氮气等温吸附-脱附等手段对介孔材料的结构形貌进行了表征,并研究了其对Pb2+的吸附性能。结果显示,以[PMIM(SO3H)][C12SO3]为模板剂和酸源制备的介孔SiO2其比表面积、孔容、平均孔径大小分别为1 010m2/g、0.95 cm3/g、3.25 nm,其对重金属Pb2+有很好的吸附性能。A novel bifunctional ionic liquid 1-methyl-3-（3-sulfopropyl）-imidazolium n-dodecayl sulfonate（[PMIM（SO3H） ][C12SO3]） was conveniently synthesized,and the structure was determined by FT-IR,^1H NMR and ^13C NMR,respectively.Furthermore,mesoporous silica was prepared from ethyl silicate（TEOS） as silica source and the obtained ionic liquid as acid source and template by traditional sol-gel methods.The formation of the mesoporous material was characterized by TGA and FT-IR.Several methods such as SAXRD,SEM,TEM and nitrogen adsorption-desorption isotherms were employed to characterized the morphological structure and properties of mesoporous silica.The experiment on Pb^2＋,one kind of heavy metal ion,adsorption was applied so as to detect the property of the material.The resultant mesoporous silica material exhibited the specific surface area of 1 010 m^2/g,the pore volume of 0.95 cm^3/g and the average pore diameter size of 3.25 nm,respectively,while the mesoporous silica has a good adsorption property for heavy metal ion of Pb^2＋.

关 键 词：双功能性离子液体 模板剂 溶胶-凝胶 介孔材料 吸附性能 

分 类 号：O613.72[理学—无机化学] O611.4[理学—化学]