Preparation of amino-functionalized mesoporous silica thin films with highly ordered large pore structures

被引：7

作者：

Zhang, Xueao ^{[1
]}

Wang, Jianfang ^{[1
]}

Wu, Wenjian ^{[1
]}

Liu, Changli ^{[1
]}

Qian, Siwen ^{[1
]}

机构：

[1] Natl Univ Def Technol, Coll Aerospace & Mat Engn, Changsha 410073, Peoples R China

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2007年 / 43卷 / 03期

关键词：

mesoporous silica; thin films; amino group; sol-gel; cytochrome c;

D O I：

10.1007/s10971-007-1588-9

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Highly ordered amino-functionalized mesoporous silica thin films have been directly synthesized by co-condensation of tetraethoxysilane (TEOS) and 3-aminopropyltriethoxysilane (APTES) in the presence of triblock copolymer Pluronic P123 surfactant species under acidic conditions by sol-gel dip-coating. The effect of the sol aging on thin films organization is systematically studied, and the optimal sol aging time is obtained. The amino-functionalized mesoporous silica thin films exhibit a long-range ordering of 2D hexagonal (p6mm) mesostructure with a large pore size of 8.3 nm, a large Brunauer-Emmett-Teller (BET) specific surface area of 680 m(2) g(-1) and a large pore volume of 1.06 cm(3) g(-1) following surfactant extraction as demonstrated by X-ray diffraction (XRD), Transmission electron microscope (TEM), and physical adsorption techniques. Based on BET surface area and weight loss, the surface coverage of amino-groups for the amino-functionalized mesoporous silica thin films is calculated to be 3.2 amino-groups per nm(2). Moreover, the functionalized thin films display improved properties for immobilization of cytochrome c in comparison with pure-silica mesoporous thin films.

引用

页码：305 / 311

页数：7