超疏水有机-无机杂化硅基介孔分子筛对苯丙氨酸的吸附研究  

Adsorption Studies of Phe on Super-hydrophobic Organic-inorganic Hybrid Mesoporous Silica

作　　者：高强[1,2] 徐耀[1] 吴东[1] 孙予罕[1] 

机构地区：[1]中国科学院煤炭化学研究所煤转化国家重点实验室,太原030001 [2]中国科学院研究生院,北京100039

出　　处：《化学学报》2009年第15期1754-1758,共5页Acta Chimica Sinica

基　　金：国家自然科学基金(No.20573128);山西省自然科学基金(Nos.20051025;2006021031)资助项目

摘　　要：为了提高中性氨基酸在硅基介孔分子筛上的吸附量,采用中性氨基酸苯丙氨酸(Phe)为模型吸附质,考察Phe在一种新型的通过非模板剂途径制备的有机-无机杂化硅基介孔分子筛上的吸附情况.利用该分子筛超疏水表面、大的比表面积和孔容以及特殊的疏水区域,Phe达到了非常突出的吸附效果.通过优化溶剂组成,发现当溶剂为等体积比的甲醇和水的混合溶液时,Phe在此分子筛上的最大吸附量达到0.827mmol/L,远高于同等条件下Phe在常规法制备的甲基化硅基介孔分子筛上的吸附量0.122mmol/L.对Phe在该分子筛上的吸附机制进行了简要阐述.In order to increase the adsorption amount of neutral amino acids on mesoporous silica, amino acid phenylalanine （Phe） was selected as model adsorbate to investigate its adsorption on a novel or- ganic-inorganic hybrid mesoporous material that was made without template agents. Based on remarkable characteristics of this mesoporous material including super-hydrophobic surface, large specific surface area and pore volume, and extraordinary hydrophobic region, the adsorption of Phe on this adsorbent was highly satisfactory. When CH3OH-H20 binary solvent was used as the adsorption solvent with the volume ratio of CH3OH to H20 being 50 ： 50, the maximum adsorption amount of Phe reached 0.827 mmol/L, much higher than that （0.122 mmol/L） of Phe adsorption on traditionally prepared CH3-functionalized mesoporous silica. In this study, the adsorption mechanism of Phe was also discussed.

关 键 词：吸附 中性氨基酸 硅基介孔分子筛 超疏水 

分 类 号：O647.31[理学—物理化学]