摘要
合成了一种具有较大孔径的氨基改性介孔二氧化硅材料(m-MCF)。通过XRD、TEM、低温氮吸附、TGA、FTIR以及原子吸收光谱(AAS)等表征方法对产物的结构和性能进行的分析表明:利用三甲基苯为扩孔剂制备得到的介孔材料具有较大的孔径,有利于功能基团对孔内表面的改性。当氨基改性介孔材料后,该材料仍然保留较大的孔径(22nm)和较高的比表面积(444m^2·g^(-1))。研究发现:与改性而未扩孔的介孔二氧化硅SBA-15相比,该材料对铜离子的吸附能力提高了2倍。
macroporous silica materials were surface modified by a grafting method using amine functional groups. The structure and physicochemical properties of the materials were characterized with low-angle XRD, N2 adsorption-desorption, FTIR and atomic absorption spectrophotometry （AAS）. The obtained materials still held a high surface area of 444 m^2·g^-1 and a larger pore size of 22 nm after the pore surface was functionalized with 3-aminopropyl-triethoxysilane （APTES）. The adsorption properties were investigated by Cu^2＋ removal from aqueous solutions. The resultant materials demonstrated an improved adsorption capacity, which is almost three times as high as that of conventional amine modified mesoporous silica SBA-15.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2007年第9期1627-1630,共4页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.50573013)
上海市科委(No.05ZR14077)资助项目。
关键词
介孔材料
改性
扩孔
3-氨丙基三乙氧基硅烷
吸附
mesoporous materials
modified
pore-expanded
3-aminopropyhriethoxysilane
adsorption
作者简介
杨娜，女，23，硕士研究生；研究方向：纳米复合材料。
通讯联系人。E-mail：smzhu@sjtu．edu．cn
