苯基官能化介孔二氧化硅固相微萃取涂层的合成与表征  

Synthesis and characterization of phenylfunctionalized mesoporous silica using as solidphase microextraction fiber coating

作　　者：杜新贞[1] 王亚荣[1] 马骞[1] 毛学峰[1] 侯经国[1] 

机构地区：[1]西北师范大学化学化工学院,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2005年第2期52-54,76,共4页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(20735031)

摘　　要：以正硅酸乙脂为硅源, 十六烷基三甲基溴化铵为结构模板剂, 苯基三甲氧基硅烷为偶联剂, 根据共水解缩聚一步合成了苯基官能化的介孔二氧化硅(C6H5 MCM 41). 用小角X 射线衍射表征其孔道特征, 红外光谱、元素分析和滴定法表征其有机键合量和表面覆盖率. 结果表明, 介孔二氧化硅具有 MCM 41 的孔道结构特征, 苯基成功键合至孔道表面而形成无机/有机介孔复合体(C6H5 MCM 41), 高键合量的苯基导致介孔二氧化硅具有很强的疏水性和热稳定性; 与高效液相色谱联用, 以C6H5 MCM 41为固相微萃取的涂层对苯并芘有较高的萃取效率.Onestep synthesis of mesoporous silica tethered with phenyl group(C_6H_5MCM41) is employed using tetraethyoxysilane as silica source,cetyltrimethylammonium bromide as a directing template and trimethoxyphenysiliane as a silanized reagent under alkaline reaction conditions.The assynthesized mesoporous composite is characterized by small angle Xray diffraction,FTIR,elemental analysis and titration.The experimental data show that the MCM41type inorganic/organic composite with hexagonal structure is prepared. Phenyl group bonded to mesoporous surface further affords to establish high hydrophobicity and thermal stability. Higher extraction efficiency of benzo[a]pyrene is obtained using phenylfunctionalized mesoporous silica as solidphase microextraction fiber coating.

关 键 词：介孔二氧化硅 介孔二氧化硅复合体 固相微萃取 

分 类 号：O648[理学—物理化学]